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121	Language and Culture Education	ABS-55
DEVELOPMENT OF TEACHING MATERIALS INDONESIAN FOR FOREIGN SPEAKERS (BIPA) BEGINNER LEVEL CHARGED WITH NORTH SUMATRA CULTURE BASED ON THE CANVA APPLICATION Emasta Evayanti Simanjuntak, Salmah Naelofaria, Tangson R. Pangaribuan Universitas Negeri Medan Abstract The purpose of teaching Indonesian for Foreign Speakers (BIPA) is to disseminate Indonesian, convey various information about Indonesia, including introducing Indonesian culture. Culturally charged teaching materials are one way to achieve this goal. In reality, the availability of teaching materials Indonesian for Foreign Speakers (BIPA), especially BIPA digital teaching materials, is low. For this reason, this study aims to produce BIPA teaching materials for beginners (A1) charged with North Sumatra culture based on the canva application. The research method used in this research is the R&D method with a 4-D development model. This research is limited to the development stage (develope). Based on the results of the study obtained (1) the results of material expert validation obtained a validity value of up to 82.5% and were included in the criteria of being valid and suitable for use for learning- (2) the validation results of design experts obtained a validity value of up to 85.5% and were included in the valid criteria and suitable for use for learning- (3) the practitioner^s response was obtained a value of 90% and was declared worthy and accepted as teaching material. Keywords: BIPA beginners, culture, canva Share Link | Plain Format | Corresponding Author (Emasta Evayanti Simanjuntak)

122	Language and Culture Education	ABS-100
PEMBELAJARAN BAHASA DAN SASTRA INDONESIA BERBASIS KEADILAN GENDER BAGI SISWA SMP DI KABUPATEN SAMOSIR M Oky Fardian Gafari (a*) Rosmaini (b) Wahyu Wiji Astuti (c) Muhammad Hafidz Assalam (d) Fakultas Bahasa dan Seni, Universitas Negeri Medan, Jalan Willem Iskandar Pasar V Medan Estate *oky[at]unimed.ac.id Abstract Pembelajaran bahasa dan sastra Indonesia merupakan pembelajaran yang berkorelasi dengan perkembangan psikologis peserta didik. Materi bahasa dan sastra Indonesia yang merupakan bagian dari kebudayaan dirancang untuk menstimulus siswa agar memiliki kepekaan kebudayaan dan kemanusiaan yang tinggi. Dalam beberapa kasus, muatan kebudayaan yang muncul justru berbenturan dengan nilai kemanusiaan. Beberapa teks bahasa Indonesia mendemonstrasikan ketidakadilan peran gender, khususnya yang terjadi pada perempuan. Misalnya, deskripsi ibu yang selalu ditempatkan di ruang-ruang domestik, seperti memasak, mencuci, dan menyapu lantai. Sementara itu, sosok ayah menjadi sosok yang selalu dicitrakan bekerja di kantor, berwibawa, dan memiliki ketegasan. Hal ini tentu merugikan perempuan dan berpotensi untuk memupuk wacana ketidakadilan di pikiran siswa. Artikel ini menyajikan hasil penelitian yang menghasilkan produk berupa bahan ajar mata pelajaran Bahasa Indonesia berbasis keadilan gender bagi siswa SMP di Kabupaten Samosir. Tujuan penelitian adalah 1) Menghasilkan bahan ajar mata pelajaran Bahasa Indonesia berbasis keadilan gender bagi siswa SMP di Kabupaten Samosir, 2) Mengukur validitas bahan ajar mata pelajaran Bahasa Indonesia berbasis keadilan gender bagi siswa SMP di Kabupaten Samosir. Penelitian menggunakan metode pengembangan dengan model ADDIE (Analysis, Design, Develop, Implementation, Evaluation). Uji validitas melibatkan ahli materi dan desain. Berdasarkan uji validitas, diperoleh hasil bahwa bahan ajar memperoleh skor rata-rata oleh dua orang validator sebanyak 89,25% pada kategori sangat layak. Adapun uji validitas lanjutan diberlakukan bagi siswa dan guru SMP di Kabupaten Samosir dengan perolehan rata-rata 87,05% pada kategori sangat layak. Uji validasi ini menggunakan teknik angket untuk menjaring data kelayakan bahan ajar berdasarkan penilaian siswa dan guru SMP di Kabupaten Samosir. Keywords: Bahan ajar, Bahasa Indonesia, Gender Share Link | Plain Format | Corresponding Author (M Oky Fardian Gafari)

123	Language and Culture Education	ABS-107
Development of Case Method and Project Based Museology Textbooks in the Department of History Education, Universitas Negeri Medan 1Apriani Harahap1, 2nd Mhd. Ihsan Syahaf nasution2,3rd Pidia Amelia3, 4th Muhammad Rivai4, Yenny Maharani Lubis5, and 6th Khalisatun Zahra6 Department of History Education, Faculty of Social Science, Universitas Negeri Medan, Indonesia Abstract This study aims to develop teaching materials based on case methods and projects in museology courses at the Department of History Education, Faculty of Social Sciences, Universitas Negeri Medan. This research belongs to the type of research and development (research and development) with reference to the model developed by Borg & Gall experts. The textbook compiled by the researcher was validated by material experts and media experts before being tested on students. The results of the validation of teaching materials show that the case methods and projects that have been applied are relevant and original and can be used as student references. The presentation of the museology learning materials is in accordance with the learning outcomes and the overall results can be concluded that the teaching materials are feasible and valid to become museology teaching materials and can be tested at a later stage. Keywords: Museology, Case Method, Project, Learning Materials Share Link | Plain Format | Corresponding Author (apriani harahap)

124	Language and Culture Education	ABS-114
Developing Self Assessment Model in Scientific Writing Anni Holila Pulungan, Rika, Khairunnisa Batubara Universitas Negeri Medan Abstract Abstract. Assessment is an essential part of a teaching and learning process. By the assessment, the level of mastery of one^s cognitive, affective and psychomotor competencies will also be known. The assessment process in Scientific Writing for students at the Universitas Negeri Medan of English Education study program is still carried out conventionally, just by assigning a topic based on the lecturer^s instructions. This study aims to develop a self-assessment model in the Scientific Writing course for students in the fourth semester of English Education study program. The research design used is Educational Research and Development (Gall, Gall, and Borg, 2003). Data collection was done through observation, questionnaires and group discussion forums, testing validation and reliability. The results of the research are shown through a self-assessment model which was developed based on the evaluation results of lecturers and students in the Scientific Writing which certainly makes students more mature and responsible for the results of the work the work they do. Keywords: Self Assessment, Developing, Scientific Writing, Assessment Share Link | Plain Format | Corresponding Author (Anni Holila Pulungan)

125	Language and Culture Education	ABS-154
Of Hurting and Healing: A Stylistic Study of Non-Regular Students^ New Culture through Emphatic Digital Sanative Poetry Writing Andreas Akun, Wiwik Andreani, Fredy Purnomo, Reni Agias Putri, Keenan Ario, Ikhsan Bella Persada Bina Nusantara University Abstract Covid-19 has forced humans to transform their learning culture into digital culture where learning challenges and opportunities are widely contested. Online learning seemed to be the only choice when the pandemic started in early 2019 and this has brought a new culture, especially for the Non-Regular students. The aims of this study are to trace students^ learning difficulties and opportunities in their new learning culture through their poetry writing focusing on hurting and healing words, their relationship to academic self-esteem and anxiety, and to find out the more preferred platform in expressing and coping with learning challenges. Stylistic analysis of the metaphorical expressions found in the poems is done and verified. Data is gathered through each students^ poem, its metaphorical textual analysis, questionnaire (DASS=Depression Anxiety Stress Scale and RSES=Rosenberg Self Esteem Scale), and deep interview with the students. The results show that students^ learning difficulties stem from low self-esteem, higher depression and anxiety regarding their learning and future pressures and fears. The more preferred poetic expression is done through digital poetry writing application than manual/traditional one, due to its practicality, emphatic and creative assistance. The research implies that sanative poetry writing may be proposed as an alternative coaching medium to therapeutically assist non-regular students to better succeed their study. Keywords: Digital sanative writing, empathy, non-regular students, poetry, stylistics Share Link | Plain Format | Corresponding Author (Andreas Akun)

126	Language and Culture Education	ABS-166
REPRESENTATION OF CHARACTER EDUCATION IN CHILDREN^S STORIES ^PINOKIO^ DAN ^ANAK GEMBALA DAN SERIGALA^ (ROLAND BARTHES STUDIES) Muharrina Harahap (a*), Hera Chairunisa (b), Ita Khairani (c), Heny Anggreini (d) (a, b, c, d) Indonesian Language and Literature Study Program, Faculty of Languages and Arts, Universitas Negeri Medan, Indonesia, * muharrina[at]unimed.ac.id Abstract The purpose of this study is to find out the ideology of the children^s stories ^Pinocchio^ and ^The Shepherd and the Wolf^ that the author wants to spread to his readers, especially children. This goal is motivated by the problem that the characters described by the author in the children^s stories ^Pinocchio^ and ^The Shepherd^s Son and the Wolf^ are deviant characters, namely liars. The ^liar^ character must be interpreted in depth to get values that build children^s character. The search for meaning uses the semiotic concept of Roland Barthes. The results of this study are the children^s stories ^Pinocchio^ and ^The Shepherd and the Wolf^ provide character education, which is about honesty. In this children^s story, the author wants to convey that honesty is a character that must be built from an early age. Keywords: dren^s stories, character education, Roland Barthes Share Link | Plain Format | Corresponding Author (Muharrina Harahap)

127	Language and Culture Education	ABS-168
Development of Learning Methods based on Deiktische Ausdruecke Method to Improve Leseverstaendnis (Reading Comprehension) of German Students Suci Pujiastuti, Jujur Siahaan, Ryan Dallion, Cindy Hasibuan, Risma ES Panjaitan Universitas Negeri Medan Abstract The aim of this research is to develop the deiktische Ausdruecke (referral speech) method to improve the Leseverstaendnis (reading comprehension) of German language students in Semester 2 Academic Year 2021/2022. In this study, a development method with a design and development research by Richey and Klein (2009) will be used. Leseverstaendnis is the process of decoding in the form of writing that must be interpreted, so that what the author conveys can be understood and concluded. However, students often face difficulties in the process of understanding the encoding of the reading text, so a method is needed, namely the deiktische Ausdruecke. Deiktische Ausdruecke is a pragmatic study which is one of the linguistic units (words, phrases, clauses) whose reference or referent is determined by the speaker. References contained in reading texts are often ignored by students, causing errors in understanding information about the contents of the text. In the deiktische Ausdruecke, every referent or reference in the reading text that refers to the previous information becomes a guideline for understanding the contents of the reading text. The deiktische Ausdruecke consists of die personal deixis, place deixis, time deixis, discourse deixis, and social deixis. Basically, Leseverstaendnis aims to understand and analyze German reading texts in the level of difficulty from simple (A1) to more difficult (B1). It is important to apply this deixis method in order to achieve the objectives of the Leseverstaendnis. This research was conducted at the German Language Education Study Program, Universitas Negeri Medan. In this study, there was one class that was treated as an experimental class with deiktische Ausdruecke. The experimental class is class C 2020 totaling 26 people. Leseverstaendnis of students before the deiktische Ausdruecke treatment showed an average score of 75.80 while after the deiktische Ausdruecke it reached 83.84. This shows that there is a positive increase. Keywords: Deiktische Ausdruecke, Leseverstaendnis Share Link | Plain Format | Corresponding Author (Suci Pujiastuti)

128	Language and Culture Education	ABS-183
Development of Art and Culture Teaching Materials Based on North Sumatra Local Content Uyuni Widiastuti (1), Ruth Hertami (1), Ilham Rifandi (1) (1) Faculty of Language and Arts, Universitas Negeri Medan Jalan William Iskandar Pasar 5 Medan Estate, Medan 20221, Indonesia Abstract The cultural arts teaching materials developed include traditional arts from North Sumatra, including: traditional music (Karo- Simalungun, Nias), traditional dances (Mandailing, Sibolga, Dairi), traditional theater (Makyong and Batak Opera). The results of the assessment of the material expert validators are an average of 96.5% (very valid). The test results to students averaged 85.07 (practical). The results of the assessment of the effectiveness of the Arts and Culture teaching materials were an average of 67.08 (effective), the second stage trial averaged 91.25 (Very Effective). The results obtained from the N-Gain value on the effectiveness test got a value of 0.81 percentage > 70% in the Very Effective category. The conclusion is based on the acquisition of the N-Gain value, it is known that the packaging of learning in Art and Culture teaching materials based on local content in North Sumatra is very effective. Keywords: Teaching Materials, Cultural Arts, Local Content Share Link | Plain Format | Corresponding Author (Uyuni Widiastuti)

129	Management Innovation	ABS-69
South Tapanuli Agropolitan Smart Regency: A Proposed Model Moh. Muttaqin (a), Vita Pusvita (b) Research Center for Society and Culture, Institute of Social Sciences and Humanities, National Research and Innovation Agency, Gedung B.J. Habibie Jalan M.H. Thamrin Nomor 8, Jakarta Pusat 10340, Indonesia a) mohm004[at]brin.go.id b) vita005[at]brin.go.id Abstract Smart city is a city model widely developed around the world, despite of its various definitions and concepts. Towards the best city quality of life, smart cities force various aspects of life to be managed in an integrated manner to solve complex urban problems, so that a large number of smart city models are born. In Indonesia, the smart city model is also applied to regencies known as smart regency. This paper proposes a model for developing a smart regency with agropolitan characteristics in South Tapanuli using the Garuda Smart City Framework (GSCF), a smart city development framework. The proposed model has been aligned with the regional development policy (RPJMD), the ICT strategy policy (RIPTIK/Renduk SPBE), and the local spatial plans (RTRW) Policy. This paper also proposes two areas as smart regency living labs, namely Batangtoru and Sipirok. Keywords: smart city- smart city framework- smart regency- smart agropolitan- living lab Share Link | Plain Format | Corresponding Author (Moh Muttaqin)

130	Management Innovation	ABS-137
Challenges of Cooperation between the Vocational Higher Education Study Program of Private Universities in North Sumatra and Industry in the Implementation of the Independent Campus Policy Yuniarto Mudjisusatyo (a*), Muslim (b) a) Master of Education Administration-Post-Graduate Study Program, State University of Medan * yuniarto[at]unimed.ac.id b) Mechanical Engineering Education Study Program, Faculty of Engineering, State University of Medan Abstract The independent campus policy requires Private Universities managers to develop change management in cooperation with industry. This study aims to identify challenges in managing change management in implementing a separate campus policy. This research uses a survey method. The research sample is 65 managers of the Private College Vocational Studies Program in North Sumatra. Data collection using an online questionnaire. The accreditation profile of the vocational study program is 39.31% B, 39.31 C, and 22.41% not yet accredited. The type of collaboration with industry that is utilized by the vocational study program is dominated by industrial internships (76.9%), curriculum development (60%), industry practitioners as guest lecturers (35.38%), and collaboration in the field of learning based on real projects from industry (24.62%). The research suggests an alternative to increasing cooperation between private college vocational study programs and industry is strengthening the existing collaboration and diversifying the type of cooperation. The second alternative is to develop the principle of cooperation by implementing management that is oriented towards maintaining accreditation. Keywords: industrial cooperation- vocational higher education- private universities- independent campus policy Share Link | Plain Format | Corresponding Author (Yuniarto Mudjisusatyo)

131	Management Innovation	ABS-184
Developing Professional Skills through Mentorship Program for EFL Students in Indonesia Indra Hartoyo, Fahri Haswani, Nora Ronita Dewi, Juli Rachmadani Hasibuan Jurusan Bahasa dan Sastra Inggris FBS Unimed Abstract Professional skills must be developed among university students to provide them with opportunities to compete in the real world. This study aims to investigate how professional skill development can be done to English and Literature Department students of Languages and Arts Faculty Universitas Negeri Medan through mentorship program. Twenty-four students were involved in four different fields such as Digital Literature, Journalism, Prose Writing, and Digital Teaching Media. Four professionals were chosen to become the mentors. The program was conducted from May 18th to July 8th, 2022. It began with collecting students^ needs related to the skills. Communicating with lecturers of relevant subjects, the twenty-four students were selected as mentees. Then, the mentors were chosen and assigned. Next, a technical meeting was done before the students joined a group. After that, the mentoring sessions were held for five 100-minute meetings in the following scenario: (1) brainstorming and idea filtering, (2) outlining or planning the product, (3) product drafting, (4) product reviewing and revising, and (5) finishing. During each session, all group activities were closely monitored. One best student of each group was selected by the mentor. In the last stage, an evaluation of the program was done. From all mentees who actively participated and submitted their products, it can be concluded that they were challenged to exploit their creativity and develop professional skills. Keywords: Keywords: professional skills, development, mentorship program Share Link | Plain Format | Corresponding Author (Indra Hartoyo)

132	Mathematics and Natural Sciences	ABS-108
THE EFFECT OF DYE COFFEE SYNTHESIS ON TEMPERATURE CALCINATION TOWARD SEMICONDUCTOR PARTICLE OF ZnO - TiO2 USING SOL-GEL - SPIN COATING MATERIALS AS A SOLAR CELL Abdul Rais Physics Department, Universiyas Negeri Medan Abstract A synthesis was fabricated from ZnO, TiO2, and C5H12O using thin films, KCl, and HCl electrolyte solutions as precursors. The process of making ZnO-TiO2 used the Hot Plate Stirrer Sol-Gel equipment. The results of the ZnO-TiO2 layering with FTO thin films were furnaced with calcination temperatures: 4000C, 5000C, and 6000C. Each sample was characterized by XRD, Scanning Electron Microscopy (SEM), UV-vis. and FTIR. XRD analysis characterization on TiO2 + Arabica coffee with a calcination temperature of 500o C had the highest point of 1035 as the integrated int (counts) and 100 as the intensity (counts). And the highest crystal size in ZnO + Robusta coffee is 500 C with a value of = 446. 846 Ao and the crystal size is 44.68 nm. The photon energy is found in ZnO + Robusta coffee at 400o C with a value of 3.75. 10-9 eV. The result of the SEM - EDX test, were found in ZnO + Arabica coffee at 400o C with a value of 91.57. The results of the FTIR test on ZnO + Robusta coffee 400o C have the highest transmittance value and wavelength with 3800 transmittances. 19 Ao (cm-1) and IV meters for DSSC current and voltage measurement. The results of the UV-Vis Spectrophotometer showed the ZnO-TiO2 solution dye in the visible light absorption region. The variation of the hydrolysis temperature showed that the heating of the ZnO-TiO2 affected the solar cell performance, where a temperature of 400 C has the highest efficiency value when compared to the calcination temperature of 500o C and 600o C. In this case, it influences the current and voltage or power generated. The result can provide a current of 2.5 - 4.5 mA and a maximum voltage of 3.8 eV - 8.5 eV. Keywords: ZnO-TiO2, Dye coffee, Synthesis, C5 H12 O, Dehydrolysis, Thin Films FTO Share Link | Plain Format | Corresponding Author (Abdul Rais)

133	Mathematics and Natural Sciences	ABS-110
The Ab Initio study of the structure of the [Fe2(Htrz)6(trz)3]BF4 and the [Fe4(Htrz)10(trz)5](BF4)3 complexes at the low spin and the high spin states Asep Wahyu Nugraha *1), Ani Sutiani 1), Djulia Onggo 2), and Muhamad A Martoprawiro 2) Physical Chemistry Division Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, Jalan Willem Iskandar V Medan Estate Medan 20222 Indonesia Inorganic and Physical Chemistry Research Group, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Ganesha 10 Bandung 40132 Indonesia Abstract The aim of this study was to determine the structure of the [Fe2(Htrz)6(trz)3]BF4 and the [Fe4(Htrz)10(trz)5](BF4)3 complexes in the low spin state and high spin state. Determination of the complex structure using the visualization of the results of computational chemistry calculations. Computational chemistry calculations using the function basis set UHF 6-31G(d). The Fe(II) 1,2,4 H-triazole complex has a polymeric structure, so the computational calculations used molecular modeling with two and four Fe(II) ions. Models of the complex compounds with two Fe(II) ions was the [Fe2(Htrz)6(trz)3]BF4 complex and the models with four Fe(II) ions was the [Fe4(Htrz)10(trz)5](BF4)3 complex. The results of this study showed that the distance between Fe (II) ions in the [Fe2(Htrz)6(trz)3]BF4 complex at the low spin and the high spin states respectively, were 3.792 and 4.043, while in the [Fe4(Htrz)10(trz)5](BF4)3 complex at the low spin and the high spin states respectively, were 3.823 3.839 and 3.995 4.008. The distance between Fe (II) ions at high spin state is longer than the distance between Fe(II) ions at low spin state. The Fe-N bond lengths on the [Fe2(Htrz)6(trz)3]BF4 complex at the low spin was 2.047 2.123 and the high spin states was 2.173 2.372, whereas in the [Fe4(Htrz)10(trz)5](BF4)3 complex at the low spin states was 2.064 2.228 and the high spin states was 2.140 2.502. The length of the FeN bond at the high spin state is longer than the length of the Fe-N bond at the low spin state. Keywords: complex structure, the 1,2,4 H-triazole Fe(II), computational chemistry, and visualization Share Link | Plain Format | Corresponding Author (Asep Wahyu Nugraha)

134	Mathematics and Natural Sciences	ABS-130
Antibacterial Activity of Clove Medicinal Plants (Bischofia javanica Blume) Against Cell Damage of Staphylococcus aureus and Salmonella enterica Idramsa Idramsa (a*), Hendro Pranoto(a), Uswatun Hasanah (a) Faculty Mathematics and Natural Sciences, Universitas Negeri Medan, Jl. Willem Iskandar Psr V-Medan Estate, Medan 20221, Indonesia. idramsa[at]unimed.ac.id Abstract The development of clinical microbial strains that are resistant to one or more antibiotics has become a serious problem that must be addressed immediately. This shows that in the last decade, the demand for new antibiotic substances has increased considerably. The existence of this phenomenon is increasingly encouraging the importance and the need for research to search for new compounds that have the potential as antibacterial. Plants have a variety of secondary metabolites that can be used as natural medicinal ingredients, one of which is by utilizing plant materials such as cingkam (Bischofia javanica Blume). This study aimed to isolate secondary metabolites and to test the antibacterial activity of cingkam bark extracts. Extraction of secondary metabolites using the maceration method with methanol, ethyl acetate and hexane as solvents. The antibacterial activity test was carried out using the disc diffusion method. Determination of the minimum inhibitory concentration (MIC) and minimum killing concentration (MBC) in vitro by micro dilution method against pathogenic bacteria, namely Salmonella enterica ATCC 14028 and Staphylococcus aureus ATCC 25923. The results of the research that have been carried out are known to have antibacterial activity against Salmonella enterica and Staphylococcus aureus. The extraction that produced the strongest antibacterial activity was the extraction technique with methanol as a solvent on Salmonella enterica bacteria. In Staphyloccus aureus, the extraction technique with ethyl acetate solvent produces the strongest antibacterial activity. Cingkam bark extracts has antibacterial activity against Salmonella enterica and Staphylococcus aureus. Keywords: antibacterial, cingkam (Bischofia javanica Blume), Salmonella enterica, Staphylococcus aureus Share Link | Plain Format | Corresponding Author (Idramsa Idramsa)

135	Mathematics and Natural Sciences	ABS-131
Determining Molecular Weight and Polymerization^s Degree of &#945--Cellulose Isolated from Young Coconut Coir (Cocos nucifera L.) Using the Viscosity Method Zainuddin Muchtar1, Moondra Zubir1, Siti Rahmah1, Sri Adelila Sari1, Teguh Febri Sudharma2, Rini Selly1, Puspa Sari Panjaitan1 1Chemistry Department, Faculty of Mathematics and Natural Science, Universitas Negeri Medan, Jl. Willem Iskandar, Ps V, Medan Estate, Medan, North Sumatera 2Physics Department, Faculty of Mathematics and Natural Science, Universitas Negeri Medan, Jl. Willem Iskandar, Ps V, Medan Estate, Medan, North Sumatera Abstract Coconut coir is the largest component in coconut (Cocos nucifera L.) which contains 75% fiber and 25% cork. Coconut fiber contains cellulose as much as 54.3% with &#945--Cellulose 26.6% &#945--Cellulose is a polymer that is widely used in human life. The molecular weight and degree of polymerization are important because they directly affect the chemical properties of the polymer. The purpose of this study is to determine the molecular weight and degree of polymerization of &#945--Cellulose by viscosity method and characterized by Fourier Transform Infrared (FT-IR). The results showed that the molecular weight and degree of polymerization of &#945--Cellulose of young coconut coir (Cocos nucifera L.) were 3,0841.104 gr/mol and 171 gr/mol, respectively. While the FT-IR results show a wavelength of 3328,534 cm-1, 2891,254 cm-1 which indicates the presence of O-H, C-H groups. Keywords: Coconut, &#945--Cellulose, Molecular Weight, Polymerization^s Degree Share Link | Plain Format | Corresponding Author (Zainuddin Muchtar)

136	Mathematics and Natural Sciences	ABS-143
SEIR Model in Spread Disease Tiur Malasari Siregar1, Nerli Khairani2, Suci Frisnoiry3 Universitas Negeri Medan Abstract The purpose of this study is to find out how the mathematical model of several infectious diseases is handled through the SEIR Model. Some of the infectious diseases discussed in this study are Measles, Hepatitis B, Swine Flu and Covid-19. These four diseases are deadly epidemics caused by very fast-growing viruses. So its existence is very troubling for humans. Therefore we need an appropriate method to restrain the rate of development. The research method used is Literature Study, which collects data by conducting studies exploring several journals, books and other sources of information data. The results obtained through this study are exposure to mathematical models that can explain the spread of Measles, Hepatitis B, Swine Flu and Covid-19. Keywords: SEIR Model, Measles, Hepatitis B, Swine Flu and Covid-19 Share Link | Plain Format | Corresponding Author (Tiur Malasari Siregar)

137	Mathematics and Natural Sciences	ABS-152
The Effect of Potassium Fluoride on the Structure Properties of Sm3+ Doped Zinc Borophosphate Glasses Jonny Haratua Panggabean, Juniastel Rajagukguk, Donna Rajagukguk, Adri Silitonga Universitas Negeri Medan Abstract The borophosphate glasses compositions based on (64-x)P2O5-5B2O3-15ZnO-15Li2O-15KF-1Sm2O3 are prepared by melting and quenched technique. All ingredients are mixed homogeneously in a porcelain crucible and the melting process uses a furnace with a temperature of 1200 C for 3 hours. Followed by an annealing process for 3 hours at a temperature of 500 C. Glass that is not cracked and has good transparency will then be cut and polish. The structure properties were obtained from X-Ray Diffraction (XRD) and Fourier Transform Infra Red (FTIR). The result of XRD spectra show that glass is an amorphous and FTIR spectra show that glass has symmetrical stretching of the P-O-B. Keywords: Borophosphate- Structure- Potassium Fluoride Share Link | Plain Format | Corresponding Author (Jonny Haratua Panggabean)

138	Mathematics and Natural Sciences	ABS-153
THE EFFECT OF ALKALI-FLUORIDE ON THE PHYSICAL AND STRUCTURE PROPERTIES OF Tb3+ DOPED ON PHOSPHATE GLASS MEDIUM Juniar Hutahaean, Juniastel Rajagukguk, Chayani Sarumaha Universitas Negeri Medan Abstract The phosphate glasses are prepared by melting and quenched technique. All ingredients are mixed homogeneously in a porcelain crucible and the melting process uses a furnace with a temperature of 1200 C for 3 hours. Followed by an annealing process for 3 hours at a temperature of 500 C. Glass that is not cracked and has good transparency will then be cut and polish. The physical properties analyzed include molar volume, density, refractive index, and others. The structure properties were obtained from X-Ray Diffraction (XRD) and Fourier Transform Infra Red (FTIR). The result of XRD spectra show that glass is an amorphous and FTIR spectra show that glass has symmetrical stretching of the P-O-P. Keywords: Phosphate, Alkali Fluoride, Structure, Physical Share Link | Plain Format | Corresponding Author (Juniar Hutahaean)

139	Mathematics and Natural Sciences	ABS-213
Effect of Ethanol Extract of Lemongrass Plant (Cymbopogon Citratus), Ginger (Zingiber Officinale Rosc.), Pandan Leaf (Pandanus Amaryllifolius), And Cinnamon (Cinnamomum Burmanii) On Albumin And Blood Globulin Levels In Wistar Rats (Rattus Norvegicus) given high fat Ida Duma Riris, Marini Damanik, Tita juwitaningsih, Romondang Fransiska Tampubolon and Ely Sabet Pratiwi Siagian FMIPA UNIMED Abstract This study aimed to determine the administration of a mixture of lemongrass ethanol extract (Cymbopogon citratus), ginger (Zingiber officinale Rosc.), pandan leaves (Pandanus amaryllifolius), and cinnamon (Cinnamomum burmanii) against high fat-induced blood albumin and globulin levels of wistar rats. The method was carried out by dividing the mice with 7 treatment groups and 4 tests, including KO + (Groups given standard feed)- KO- (Controls fed with high-fat standard an feed)- K+ (Simvastatin-given controls),K1, K2, K3and K4 at a dosage of 100,200,300,and400 mg/Kg BB plant extract mixture of ginger, lemongrass, cinnamon and pandan leaves). The data was analyzed with SPSS software for windows. The results showed that giving a mixture of ethanol extracts of lemongrass plants, ginger, pandan leaves, and cinnamon affected the blood albumin and globulin levels of wistar rats. A significant increase was shown in K4 (400mg/Kg BB) with normal rat levels, namely for albumin 4.8 g/dL and globulins of 3.9 g/dL. With shapiro Wilk Normality Test analysis with sig 0.05, normal distributed data. The Test of Homogeneity of Variances obtained a calculated f value greater than the f table which showed that plant extracts have the potential to increase and stabilize albumin and globulin levels. Keywords: Albumin and Globulin- ethanol extract- mixing of : lemongrass, ginger, pandan leaves, and cinnamon Share Link | Plain Format | Corresponding Author (Ida Duma Riris)

140	Mathematics and Science Education	ABS-6
Development of Electronic Module on Colligative Materials STEM Based Solutions (Science, Technology, Engineering, Mathematics) Using Kvisoft Flipbook Maker Application Makharany Dalimunthe(1), Susilawati Amdayani(1*), Dewi Syafriani (1), Haqqi Annazili Nasution (1) (1) Chemistry Education, Faculty of Mathematics and Natural Sciences, Medan States University * susilawatiamdayani[at]unimed.ac.id Abstract This research is motivated by the increasingly rapid development of science and technology, which requires Indonesia to continue to race to not only improve its infrastructure, but also to improve the quality of its human resources. In addition, the teaching materials used in lectures are still in the form of printed materials (not yet using electronic modules) and have not been integrated into STEM. The results showed that the electronic module on the colligative properties of STEM based solutions using kvisoft flipbook maker application developed was declared very feasible with an average feasibility value of 92,34. While the practicality test was declared very practical by the lecture with an average practicality value of 94 and received a very good response from students with an average practicality value of 96,38 very practical category, without revision. In terms of effectiveness, it is declared effective with an N-gain value of 0,77 high criteria. Keywords: Development, Electronic Module, STEM, Kvisoft Flipbook Maker Share Link | Plain Format | Corresponding Author (Makharany Dalimunthe)

141	Mathematics and Science Education	ABS-7
Development of Socio-Scientific Issues Based Reaction Rate Module And Science Literacy Oriented Susilawati Amdayani(1*), Ratu Evina Dibyantini (1), Ayi Darmana (1), Makharany Dalimunthe (1) (1) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan * susilawatiamdayani[at]unimed.ac.id Abstract One the efforts that can accelerate the achievement of student scientific literacy is the development of teaching materials. Socio-scientific issues based teaching materials involve use of scientific topics/ issues that intentionally require students to engage in dialogue, discussion and debate. This study aims to determine validity, practicality, and effectiveness of developed socio-scientific issues based on module. This research was conducted using the R&D research method. The results showed that the socio scientific issues based module on the reaction rate material developed was declared to be very valid with an average kappa moment value of 0,93 very high category. The practicality test was declared very practical by lecturers and students with an average kappa moment value of 0,93 very high category. Based on the test results, the module is declared effective with an N-Gain values of 0,82 high criteria. Keywords: Development, Module, Socio Scientific Issues, Science Literacy Share Link | Plain Format | Corresponding Author (Susilawati Amdayani)

142	Mathematics and Science Education	ABS-12
Validity of Junior High School Mathematics Teaching Materials Based on Case Method Integrated Local Culture Mandailing Tribe 1Prihatin Ningsih Sagala, 2Pristi Suhendro L, 3Eri Widyastuti 1Universitas Negeri Medan, Jln.Willem Iskandar Psr V Medan North Sumatera Indonesia 20221 2Universitas Negeri Medan, Jln.Willem Iskandar Psr V Medan North Sumatera Indonesia 20221 3Universitas Negeri Medan, Jln.Willem Iskandar Psr V Medan North Sumatera Indonesia 20221 Abstract Abstract. Education is a conscious and planned effort to create a learning atmosphere and learning process so that students actively develop their potential to have religious spiritual strength, self-control, personality, intelligence, noble character, and skills needed by themselves, society, nation and state, and have global mindset. Junior high school students belonging to the Generation Z category have an attitude of openness, this generation accepts various views and mindsets, causing them to easily accept diversity and differences in views. As a result, Gen Z becomes difficult to define themselves, self-identity changes based on the factors that influence their thinking. Therefore, it is very important to restore national identity or introduce the cultural identity of the surrounding community so as not to be eroded by the development of the outside world which makes generation Z forget local culture, one of which is the Mandailing Tribe Culture in North Sumatra. Development research using the ADDIE Model by integrating the Local Culture of the Mandailing Tribe in North Sumatra in developing Mathematics Teaching Materials for Class VII Junior High Schools based on students^ initial perceptions of the current condition of Generation Z. The use of the Case Method approach aims to improve students^ critical thinking skills based on the cases presented in the teaching materials. The objectives of this study are (1) to find out how students perceive the Mandailing Tribe culture contained in the VII grade junior high school mathematics teaching materials, (2) to determine the validity and practicality of seventh grade junior high school mathematics teaching materials based on case method integrated local culture of the Mandailing tribe in North Sumatra. Keywords: Validity, Teaching Materials, Case Method, Mandailing Tribe Culture Share Link | Plain Format | Corresponding Author (Prihatin Ningsih Sagala)

143	Mathematics and Science Education	ABS-15
Student^s Problem Solving and Critical Thinking Ability through a Realistic Approach in Blended Learning Based on Non-routine Problems in the Department of Mathematics, Faculty of Mathematics and Natural Sciences, Medan State University Hasratuddin- M. Amin Fauzi- Budi Halomoan Siregar- Dwi Novita Sari Medan State University Abstract This study aims to analyze the problem-solving and critical thinking skills of students through a realistic approach to non-routine problem-based blended learning in the Mathematics Department, Faculty of Mathematics and Natural Sciences, State University of Medan. This type of research is a semi-experimental research. The research population was all undergraduate students of the Mathematics Education study program (MESP) in 2020. The research sample was taken from 2 classes of the population, namely- 1) MESP 2020 A as an experimental class that is given learning with a realistic approach in blended learning based on non-routine problems, and 2) MESP 2020 B as a control class that is given online learning. The research instrument is a test of problems solving abilities and critical thinking. Data on problem solving abilities and critical thinking were analyzed using two-way ANOVA statistics. The results showed that the problem-solving and critical thinking skills of students who were given geometry learning through a realistic approach to non-routine problem-based blended learning were better than those who were given online learning. Furthermore, from the results of the study it was found that there was no interaction between learning and students^ initial abilities, both on problem skills and on students^ critical thinking skills. This shows that students^ problem-solving and critical thinking skills are always better using realistic learning approaches based on non-routine problem-based blended learning compared to online geometry learning. Thus, the suggestion from the results of this study is that in improving students^ problem-solving and critical thinking skills through a realistic approach to non-routine problem-based blended learning, it is not necessary to classify students into low, medium or high initial abilities. Keywords: This study aims to analyze the problem-solving and critical thinking skills of students through a realistic approach to non-routine problem-based blended learning in the Mathematics Department, Faculty of Mathematics and Natural Sciences, State University of Medan. This type of research is a semi-experimental research. The research population was all undergraduate students of the Mathematics Education study program (MESP) in 2020. The research sample was taken from 2 classes of the population, namely- 1) MESP 2020 A as an experimental class that is given learning with a realistic approach in blended learning based on non-routine problems, and 2) MESP 2020 B as a control class that is given online learning. The research instrument is a test of problems solving abilities and critical thinking. Data on problem solving abilities and critical thinking were analyzed using two-way ANOVA statistics. The results showed that the problem-solving and critical thinking skills of students who were given geometry learning through a realistic approach to non-routine problem-based blended learning were better than those who were given online learning. Furthermore, from the results of the study it was found that there was no interaction between learning and students^ initial abilities, both on problem skills and on students^ critical thinking skills. This shows that students^ problem-solving and critical thinking skills are always better using realistic learning approaches based on non-routine problem-based blended learning compared to online geometry learning. Thus, the suggestion from the results of this study is that in improving students^ problem-solving and critical thinking skills through a realistic approach to non-routine problem-based blended learning, it is not necessary to classify students into low, medium or high initial abilities. Share Link | Plain Format | Corresponding Author (Hasratuddin Siregar)

144	Mathematics and Science Education	ABS-24
Development of Chemical Module Based on Science Lietaracy using the Chemie Im Konteks Stage on Redox Reactions Materials Feri Andi Syuhada, Gulmah Sugiharti, Dewi Syafriani Universitas Negeri Medan Abstract This research aims to develop a redox reaction module using fireworks context. The method used in this research is the development and validation, adopting stages of the research Chemie im Konteks. Module product is validated by expert validators. The research instruments are a form to check the integration of content and context, an interview guidelines and module validation format. The result of the research is a module that combines redox reaction content with the context of fireworks. From the validation format, the Content Validity Index (CVI) value is 0,919. So that the module produced is very suitable for use in learning. Keywords: module, fireworks, redox reactions Share Link | Plain Format | Corresponding Author (Feri Andi Syuhada)

145	Mathematics and Science Education	ABS-30
Development of Problem-Based Number Theory Learning Tools Pargaulan Siagian, Wamington Rajagukguk, Faiz Ahyaningsih Pendidikan Matematika FMIPA Universitas Negeri Medan Abstract This research is a learning tool development research that aims to: (1) describe the development process and produce learning tools that are valid, practical, and effective in learning Problem-Based Number Theory- (2) to find out whether Problem-Based learning in number theory learning can improve student lecture results. This device was developed using Four D (Define, Design, Develop, and Disseminate). The trial of the development of this device was carried out in the S1 Mathematics Education Study program in number theory lectures. The purpose of developing this lecture tool can be to produce a Number Theory lecture tool: a Number Theory Textbook, and 14 Valid, Practical and Effective Lecture Event Units (SAP). The implementation process is carried out by preparing the teaching material components of the Number Theory course that will be produced in the form of: textbooks, Lecture Event Units (SAP) which can be applied to the Number Theory course in 2022. In the implementation of dissemination by applying limited Number Theory teaching materials will produce: textbooks, Lecture Event Units (SAP) as many as 14 valid, practical and effective meetings to the Lecturer Team in the Department of Mathematics FMIPA Unimed. Keywords: Development of learning tools, validity, practicality, and effectiveness Share Link | Plain Format | Corresponding Author (Pargaulan Siagian)

146	Mathematics and Science Education	ABS-42
Development of Higher Order Thinking Skill (HOTS) Chemistry Module Based on Problem Based Learning (PBL) Model on Colligative Properties of Solutions Haqqi Annazili Nasution (a*), Ayi Darmana (a), Feri Andi Syuhada (a) a) Faculty of Mathematics and Natural Sciences, State University of Medan, Jalan Willem Iskandar Ps. V Medan Estate *haqqiannazili[at]unimed.ac.id Abstract This study aims to develop a Higher Order Thinking Skill (HOTS) chemistry module which is integrated with the Problem Based Learning (PBL) learning model on the colligative properties of solutions in general chemistry courses. This research was conducted at the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Medan State University. The development of this chemistry module is carried out using a 4-D development model. Then validated by expert validators and see how students respond to the chemistry module. Based on the data analysis of the feasibility test carried out using the kappa-cohen test, the kappa moment value of 0.769 was included in the ^high^ category with a feasibility percentage of 83.3%. This is also supported by data on student responses to the chemistry module which received a positive response with an average percentage of 91.10% which was included in the very good category. Keywords: Chemistry Module, Higher Order Thinking Skill, Problem Based Learning, colligative properties of solutions Share Link | Plain Format | Corresponding Author (Haqqi Annazili Nasution)

147	Mathematics and Science Education	ABS-63
MICROLEARNING OBJECTS IN LEARNING MATHEMATICS Suci Frisnoiry, Edy Surya, Tiur Malasari Siregar, Elfitra Mathematics Education Study Program, Department of Mathematics, Faculty of Mathematics and Natural Sciences, State University of Medan Abstract This study aims to find out how to use Microlearning Objects in learning Mathematics. Mathematics is a subject that contains material on numbers, formulas and structures, shapes and spaces as well as their magnitudes and changes. This is what makes students find it difficult to learn mathematics. Therefore, we need a learning media that can represent all objects in mathematics in a simple and interesting way. Microlearning objects are expected to be the answer to existing problems because Microlearning objects have characteristics that are simple, specific, interesting, easy to distribute, easy to use and integrated with the internet or social media that students have loved. This study uses the library study method in which the data is collected through journals, books and other sources of information data. The results obtained based on various sources are known that microlearning objects are very useful in conveying mathematics material, mathematics learning becomes more fun, time is used more effectively and students are happy and looking forward to the presence of mathematics lessons in class. Keywords: Microlearning object, Learning, Mathematics Share Link | Plain Format | Corresponding Author (Suci Frinoiry)

148	Mathematics and Science Education	ABS-150
The Effect of Collaborative Learning Oriented Project Based Learning (PjBL) and Learning cycle Model with Animated Video Media on Students^ Problem Solving Retno Dwi Suyanti(a*)Gulmah S(b) Maryati P.Simanjutak(c)Rindi.D(d)Nerli.S(e) 1.Dept of Chemistry Faculty of Math and Natural Science (FMIPA) Medan State University 2. Dept of Physic Faculty of Math and Natural Science FMIPA UNIMED Abstract The background of this research is the low problem solving ability among students. This study aims to analyze the problem solving ability of students who receive learning with a collaborative Learning Oriented Project Based Learning (PjBL) and Learning cycle Model with animated video. The sampling technique used was using Pre-experimental Design (Nondesign) in the form of a one-group pre-test-post-test design. The instrument used in the form of a problem solving ability test instrument that has been validated in fulfilling the content validity and reliability requirements with a high level reliability. The results obtained from the average value of the Normalized gain was high categories on both learning models applied. Based on the results of the analysis of the hypothesis test (one sample t - test) obtained tcount>ttable. which states that the problem solving ability of students who are taught using the project based learning (pjbl) learning model and learning cycle oriented to collaborative learning with animated video media on chemistry material meets the high criteria.The results showed that the problem solving ability of students for the aspect of understanding the problem was obtained by 88%, the aspect of planning a settlement was obtained by 83%, the aspect of carrying out a settlement plan was obtained by 79% and the aspect of re-examining was obtained by 74%. So it can be concluded that the aspect of problem solving ability that is developed is the aspect of understanding the problem. Keywords: Collaborative- PjBl- learning Cycle model- Problem Solving Share Link | Plain Format | Corresponding Author (Retno Dwi Suyanti)

149	Mathematics and Science Education	ABS-151
Implementation of Transcript Based Lesson Analysis (TBLA) on Pre-Service Science Teachers Scientific Literacy and Argumentation Skills Lastama Sinaga, Pintor Simamora, Widia Ningsih, Grace Angeline Manurung Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan Abstract This study aims to analyse pre-service science teachers^ scientific literacy and argumentation skills by using the TBLA method in implementing lesson study. This study is a descriptive qualitative research that analyse the communication patterns appear in teaching and learning process by using students^ scientific literacy and argumentation skills worksheet. The sample was selected using purposive sampling technique. The data were collected using observer field notes and documentation study. The lessons recorded using cameras and camcorders devices were transcribed and analysed using the Excel program based on the number of words spoken by students and teachers. The frequency of keywords appeared in science learning was fully considered. The data were transformed into graphs. The low achievement indicators of students^ scientific literacy and argumentation skills are caused because they are still not accustomed to expressing what is on their minds and the lack of conceptual knowledge about specific topic provided in students worksheet. The result implies that TBLA is an effective method to reflect on teaching and learning practices in order to improve learning quality for better instructional practices. Keywords: Transcript-based lesson analysis, scientific literacy, argumentation, preservice science teacher. Share Link | Plain Format | Corresponding Author (Lastama Sinaga)

150	Mathematics and Science Education	ABS-158
Analysis of students^ mathematical spatial abilities in solving geometric problems Ade Andriani (a*), Izwita Dewi (b), Nurliani Manurung a) Departement of mathematic,Universitas Negeri Medan, jalan Wiliem Iskandar Pasar V, North Sumatra *adeandriani[at]unimed.ac.id b) Departement of mathematic,Universitas Negeri Medan, jalan Wiliem Iskandar Pasar V, North Sumatra c)departement of mathematic,Universitas Negeri Medan, jalan Wiliem Iskandar Pasar V, North Sumatra Abstract This study aims to describe the mathematical spatial ability of students in solving mathematical problems. The research method used is the descriptive qualitative research method. Data collection techniques were carried out by tests, interviews, and documentation. The research instrument used was a spatial ability test and interview items. The data sources of this research consist of (1) The subjects in this study are students who take field and space geometry courses in the mathematics department, one of the universities in North Sumatra, and (2) this research activity is all activities during the execution of test instruments up to the results of the test and the interview took place. Data analysis techniques include data reduction, data presentation, and concluding. The results of this study indicate that (1) students with a high level of mathematical spatial ability category can meet all the indicators of spatial ability that researchers use in this study (2) students with a category of moderate level of mathematical spatial ability can meet two of the four spatial ability indicators that researchers use. in this study (3) students with the low level of mathematical spatial ability, the category had difficulty fulfilling several indicators of spatial ability that the researchers used in this study. Keywords: spatial ability, Geometry Share Link | Plain Format | Corresponding Author (Ade Andriani)

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