Publication Search

Tingginya permintaan dan turunnya penawaran minyak goreng mengakibatkan kelangkaan dan kenaikan harga minyak goreng di sebagian besar daerah di Indonesia. Tujuan penelitian adalah untuk menganalisis perilaku serta perlindungan konsumen terhadap kelangkaan minyak goreng dipasar domestik. Kegiatan dilaksanakan dalam bentuk focus group discussion melalui media zoom. Hasil dari kegiatan menyatakan bahwa masyarakat juga harus turut kooperatif dalam melaksanakan kebijakan pemerintah dan diharapkan dapat menakar kebutuhan masing-masing demi kepentingan bersama. Edukasi terhadap diri sendiri sangatlah penting untuk menambah kepekaan terhadap kondisi perekonomian di dunia. Adanya entry barrier bagi pelaku usaha pasar untuk dapat memperoleh minyak goreng satu harga sehingga konsumen kelas menengah ke bawah dapat membeli minyak goreng kemasan dengan harga yang terjangkau. Dengan kelangkaan yang terjadi, pemerintah seharusnya mampu membatasi ekspor demi mencukupi kebutuhan domestik.

Background: Adolescent problems are things that should be highlighted at this time, this is because youth is a transitional period that will cause various problems. According to the BKKBN (2012) the problems that stand out among adolescents are issues around the Adolescent Reproductive Health Triad (KRR), namely sexuality, HIV/AIDS and drugs. The results of the 2012 Indonesian Demographic Health Survey (IDHS) for Adolescent Reproductive Health (KRR) showed that 9.3% of adolescents stated that they had had premarital sex. Based on data from the National Narcotics Agency (BNN) in 2014, 27.32% of students were drug users. The low knowledge of adolescents about reproductive health is inadequate which can be seen by only 35.3% of young women and 31.2% of young men aged 15-19 years knowing that a woman can get pregnant with one sexual intercourse. Adolescents' knowledge of sexually transmitted infections (STIs) is still low where only 35% of women and 19% of men know gonorrhea, 14% of women and 4% of men know about genital herpes while other types of STIs are below 1%.

Backgroud: There are various causes of nausea and vomiting, including hormonal changes in the body, psychology, and lifestyle. Poor diet before or in the early weeks of pregnancy, lack of sleep or rest and stress can exacerbate nausea and vomiting. Some things that can be done to reduce nausea even though they cannot be completely eliminated, are to consume a balanced diet, get enough movement and get enough rest.

Background: Social welfare is highly correlated with health because poor health can cause a decrease in the level of social welfare and vice versa. Some of the indicators used to measure the level of community welfare include; Life Expectancy (AHH), Average Years of Schooling and Per-Capital Expenditures from the community. This is consistent with the results of research by Erwin Ndakularak, et al (2013) who concluded that household expenditures for food, education and health simultaneously have a significant effect on the welfare of the people of districts/cities in the Province of Bali. From the description above, it is deemed necessary to analyze the benefits of the KBS program in improving the welfare of the people of Badung Regency..

Penelitian ini merupakan penelitian kuantitatif dengan menggunakan metodologi penelitian eksperimen. Yang digunakan untuk analisis data adalah hasil belajar siswa dengan ambang nilai KKM 80. Investigasi ini akan dilakukan di SMP Negeri 2 Pontianak. Peserta penelitian adalah siswa kelas tujuh. Siswa kelas VII A sebagai kelas eksperimen dan siswa kelas VII B sebagai kelas kontrol, masing-masing berjumlah 29 dan 28 siswa yang menjadi sampel penelitian. Penyelidikan ini memanfaatkan materi pecahan kelas VII. Menurut hasil, pembelajaran problem posing mempengaruhi hasil belajar siswa dibandingkan dengan pembelajaran tradisional. Jika disajikan dengan model pembelajaran konvensional, siswa mendapatkan skor rata-rata 62,32, namun jika disajikan dengan model pembelajaran problem posing, siswa mendapatkan skor rata-rata 81,97 lebih tinggi dari skor KKM..    

This research aims to find out the results of research analysis of students abilities through the Two Stay Two Stray (TSTS) type cooperative learning model from various literature, as well as to analyze the difficulties of students mathematical communication skills through the Two Stay Two Stray model. This type of research is descriptive qualitative and uses a literature study research method which was carried out at the Digital Library, Medan State University in July – September 2022. The instrument in this study was the author himself. The steps of this research are: (1) Designing the research. (2) Carry out the research design. (3) Analyze and provide conclusions on the results of the analysis. The analysis technique used in the selection of information related to data analysis techniques is the Miles and Huberman analysis technique. The data source used secondary data consisting of 5 journals. The conclusions of the results of this study show that: (1) The average results of tests of students mathematical communication abilities through the application of the TSTS model are: (a) The indicator of mathematical representation is 51.93%, (b) The indicator of writing/explaining mathematics was 40.31%, (c) The indicators describe is 37.94%. (2) There are several difficulties experienced by students and teachers are: (a) Students have difficulty connecting real objects, pictures, and diagrams into mathematical models, (b) Students lack confidence in communicating arguments and ideas in mathematical problems, ( c) Students are less thorough in working on questions, (d) Students have difficulty expressing mathematical ideas in the form of graphs, pictures, or tables, (e) Low student skills in understanding mathematical communication problems and drawing conclusions about mathematical communication problems, (f ) The role of the teacher is less than optimal in carrying out learning activities.

This study aims to obtain teaching materials based on a valid, practical, and effective realistic mathematical approach, so as to improve students' mathematical reasoning abilities on the material of a three-variable linear equation system. The research instruments used were questionnaire validation sheets, lesson plans validation sheets, teaching material validation sheets, test instrument validation sheets, mathematical reasoning ability tests, and teacher and student response questionnaires to teaching materials. After all instruments, lesson plans, and teaching materials were declared valid by the validator, then readability tests and field trials were carried out. The results showed that: (1) the teaching materials based on the realistic mathematical approach developed had met the criteria of validity based on the validator's assessment with the average validity of the teaching materials for the material being 3.13 and 3.29 for media with a very feasible category; (2) the teaching materials based on the realistic mathematical approach that have been developed have met the practicality criteria through: a) the results of the questionnaire student responses to teaching materials show the percentage of practicality of 81.19% with a very practical category, b) the results of the questionnaire responses of teachers to teaching materials show the percentage of practicality 88.75% with very practical category; (3) The teaching materials based on the realistic mathematics approach developed meet the effective criteria with: a) classical student learning mastery of 88%, b) more than 65% of students have achieved 75% of learning objectives for each indicator, c) increased mathematical reasoning ability students after using teaching materials seen through the average score of students increased from 50 in the pretest to 85.33 in the posttest and the results of the N-Gain analysis which showed students' mathematical problem solving abilities increased by 0.712, meaning in the high category.

The method fuzzy is one part of the fuzzy inference system that is useful for drawing conclusions or the best decision in uncertain problems. Currently, about 200 countries in the world are experiencing the Covid-19 pandemic. Various policies were carried out to overcome this. In addition to the health protocols that are always implemented, the community must also know the conditions of the area where they live so that they can anticipate any activities carried out. The method is used fuzzy to determine the risk zone for the spread of Covid-19 in North Sumatra Province based on 3 variables, namely positive cases, suspected cases, and dead cases. The data used in this study is weekly Covid-19 data from March 2021 to July 2021 for 4 selected areas, namely Medan City, Pematang Siantar City, Simalungun Regency, and Central Tapanuli Regency. All variables are represented using triangular curves and their membership functions are determined. Then the implication function of the min is used to determine the rules used. From the results of the implication function, the composition between all the rules obtained is carried out by taking the maximum rule then that value is used to modify the fuzzy area so that a new membership function is obtained. The method is used centroid to obtain a crisp or the final result is the value of the risk zone. This research also utilizes the Matlab to calculate the results. The results from the use of the Mamdani method will be compared with the real risk zone data so as to produce a 75% average percentage similarity for the data for 4 regions in North Sumatra so it can be concluded that the model made is good enough to determine the risk zone for the spread of Covid-19 in North Sumatra Province.

Penelitian ini bertujuan untuk melihat apakah terdapat pengaruh pembelajaran berbasis masalah terhadap kemampuan berpikir kritis matematis siswa SMP. Penelitian ini termasuk dalam kategori eksperimen semu. Populasi dalam penelitian ini adalah seluruh siswa kelas VIII SMP Muhammadiyah 1 Medan dengan sampel kelas VIII-Terpadu 3 sebagai kelas eksperimen dan kelas VIII-Terpadu 2 sebagai kelas control yang dipilih dengan metode random sampling. Pada kelas eksperimen diberikan pembelajaran berbasis masalah sedangkan pada kelas control diberikan pembelajaran langsung/konvensional. Instrumen tes yang digunakan berupa soal uraian berjumlah 3 soal kemampuan berpikir kritis matematis yang telah dinyatakan valid. Berdasarkan data posttest, kelas eksperimen memperoleh nilai rata-rata sebesar 85,08 dan nilai rata-rata padaa kelas control sebesar 77,06. Melalui analisis uji statistik data terbukti berdistribusi normal dan homogen sehingga dilakukan uji hipotesis. Hasil dari uji hipotesis menggunakan uji independent Samples Test diperoleh hasil Sig (2-tailed) yaitu sebesar 0,001 hal ini menunjukkan bahwa nilai signifikansi 0,001 < 0,05 yang merujuk bahwa H0 ditolak dan Ha diterima. Untuk memperkuat hasil uji maka dilakukan uji t satu pihak yang menunjukkan  nilai  pada taraf nyata a =0,05. Dengan demikian H0 ditolak dan Ha diterima, artinya terdapat pengaruh pembelajaran berbasis masalah terhadap kemampuan berpikir kritis matematis siswa SMP

This research is an experimental research which aim is to know whether Realistic Mathematics Education approach is effective on ability of students’ mathematical concept understanding or not. The population in this research is all the students of class VIII SMP Swasta Bakti Mulia Onanrunggu. The sample is the students of class VIII-A as experimental group and the students of class VIII-B as control group. The instruments which are used consist of the ability of mathematical concept understanding test in α = 5% and df = 28 + 30 - 2 = 56, teacher’s observation notes, and student’s observation notes. Data analysis is done with t test, minimal mastery criteria , classroom activity and student response . The results of this research proves that Realistic Mathematics Education approach is effective on the ability of students’ mathematical concept understanding within score of t count is greater than t table . Classical mastery criteria accomplished by (85,7%) within individual mastery reach into 75,67. Class activity falls into the active category (76,7%), and student responses fall into the positive category (91,06%).

Distribution routes are generally a problem for every company, including in the public company BULOG Medan Amplas. Distribution to the Medan Amplas BULOG public company, namely having to serve every stall that is far from the warehouse with scattered locations, and limited vehicle capacity. So far, driver considerations in distributing products have only been based on random intuitions of driver and does not consider the efficiency of the route taken. Therefore, this research uses Clarke and Wright Savings algorithm to obtain optimal mileage by taking into account every consumer demand and vehicle capacity. Calculation results using the Clarke and Wright Savings Algorithm obtained the vehicle mileage of 695.08 km with a savings of 11 km or 1.56%.

Analysis of panel data regression is a regression method to determine the relationship between the independent variable and the dependent variable using combined data, namely between cross-section data and time-series data.Analysis of panel data regression can apply to the processing of rice production estimates for an area including the province of North Sumatera. North Sumatera is one of the provinces in Indonesia, at the very of the population focuses on the agricultural sector as the main livelihood in rice being the primary production. Based on data on the development of rice production at the Agriculture Office of North Sumatra Province, the level of rice production in 2019 for North Sumatra Province reached 4,693,563 Ton/Year.Throught Panel Data Regression Analysis with the three approach methods is Common Effect Model (CEM), Fixed Effect Model (FEM) and Random Effect Model (REM) , the best approach method is obtained, namely the Fixed Effect Model (FEM) with the best estimation model is . The coefficient of determination  of 0.950890, which means that the independent variable affects the dependent variable by 95.08% on rice production.Based on the estimation model, the development of rice production in the next 3 years, namely 2020, 2021 and 2022, has changes of around 39.88% (decrease), 10.68% (increase), 9.89% (increase).

The Erlang distribution is a special case of the Gamma distribution with the k shape parameter and the λ rate parameter. In this study, the parameter estimation of the Erlang distribution was carried out using the Maximum Likelihood method. In maximizing the function, an implicit and non-linear form is obtained, then it is solved using the Newton Raphson algorithm. Apart from Newton Raphon, the estimation of parameters was also carried out using the Fisher Scoring algorithm. The Fisher Scoring algorithm is similar to the Newton Raphson algorithm, the difference is that Fisher Scoring uses an matrix information. The result of parameter estimation in Erlang distribution using Newton Raphson algorithm which is applied to outgoing telephone call data that generated by Matlab R2010a software cannot be done simultaneously. Therefore, the parameter assessment is carried out on the k parameter first, then followed by the λ parameter estimation and the parameter and  = 0.6886812 are obtained. Meanwhile, the parameter estimation using the Fisher Scoring algorithm produces an equation that is not different from the Newton Raphson algorithm

Kemiskinan merupakan permasalahan multidimensi yang kompleks dan mencakup berbagai aspek. Akibat kompleksitas yang dimilikinya, penanggulangan kemiskinan memerlukan program yang terintegrasi dan tidak tumpang tindih. Tujuan dari penelitian ini terfokus pada analisis faktor-faktor penyebab kemiskinan di Provinsi Sumatera Utara dengan mempertimbangkan aspek spasial menggunakan metode Geographically Weighted Regression (GWR).  Penelitian ini menggunakan data kemiskinan Provinsi Sumatera Utara pada tahun 2018. Berdasarkan pengujian heterogenitas spasial dan dependensi spasial dapat disimpulkan bahwa kemiskinan dipengaruhi oleh aspek spasial sehingga penelitian ini dapat dianalisis menggunakan metode GWR. Pemodelan dengan menggunakan metode GWR menghasilkan nilai  yang lebih besar  dari regresi global yang mengahasilkan . Kemudian metode GWR menghasilkan  nilai AIC = 171.123 yang lebih kecil dibandingkan dengan model regresi global dengan nilai AIC = 185.909.Hasil analisis menunjukkan karakteristik persentase kemiskinan  mengelompok. Daerah-daerah yang tergolong memiliki persentase tertinggi berada di daerah kepulauan Nias.

This study aims to determine students’ mathematical connection abilities with the think talk write cooperative learning model. The type of research used is research with a qualitative approach. Qualitative research uses descriptive or verbal data from people who have behaved. The method used is literature study. The type of data used is secondary data. Secondary data is data that already exists, so we just need to find and collect existing data. The secondary data source used in this research is the influence of the cooperative learning model of the think talk write type on students’ mathematical connection .From the search results, the researchers found 3 journals and 2 thesis relevant to the research topic. From the journal it was found that there was an influence of the think talk write cooperative learning model on students’ mathematical connection abilities.

This study aims to find out that studying literature can effectively improve students' mathematics learning achievement with the STAD type cooperative learning model.  The type of research used is research with a qualitative approach.  Qualitative research uses descriptive or verbal data from people who have observed a behavior.  The method used is literature study.  Literature study is an activity that is closely related to the method of collecting library data, reading and taking notes as well as processing research materials.  The type of data used is secondary data.  Secondary data is data that already exists, so we just need to find and collect existing data.  The secondary data source used in this research is student learning outcomes with the STAD type cooperative learning model.  From the search results, the researchers found 7 journals relevant to the research topic.  From the journal it was found that there was an increase in student learning outcomes using the STAD type cooperative learning model.

Perum Bulog as a State-Owned Enterprise has the main task, which is to conduct a quality and adequate basic food logistics business for the survival of the people. The problem that occurred in Perum Bulog Sub Divre Medan is that the rice supply in Bulog does not consider the demand in the market. Forecasting is an important tool in effective and efficient planning. Therefore, prediction is indispensable for predicting future events. This method essentially uses past data initiated by performing an exponentially decreasing weighting of older observational values or newer values. Brown's double exponential smoothing is a linear model proposed by Brown. This double exponential smoothing method is used when the data indicate a trend. In this study, the terbaik best parameter for forecasting the Number of Rice Sales in Perum Bulog Sub Divre Medan was α = 0.2 with MAPE of 0.27%. And the results of the forecast for Rice Sales at Perum Bulog Sub Divre Medan in 2022 are decreasing every month.

This study aims to determine : (1) The effect size of using mathematic learning media to students’ mathematical abilities as a whole, (2) The effect size of using mathematics learning media to students’ mathematical abilities based on level of education, (3) The effect size of using mathematics learning media to students’ mathematical abilities based on learning media used, (4) The effect size of using mathematics learning media to students’ mathematical abilities based on subject matter, (5) The effect size of using mathematics instructional media to students’ mathematical abilities based on quantified mathematical ablility. This research used meta analysis method. The sampling technique used purposive sampling and obtained 17 research that fit the criteria. Data collection techniques used documentation with the support of software publish or perish. The results of data analysis showed that : (1) Overall using the learning media has a large effect to students’ mathematical abilities as a proportion 0,972, (2) Based on level of education, the use of learning media has a largest effect size if applied at SMP/MTs as a proportion 1,039 (n=16, SD=0,754), (3) Based on learning media used, the visual media has a largest effect size to students’ mathematical abilities as a proportion 1,003 (n=13, SD=0,641), (4) Based on material that is taught, the use of learning media on a branch of logic material has a largest effect size to matematical abilities as a proportion 1,237 (n=2, SD=0,489), (5) Based on quantified mathematical abilities, the use of learning media has a largest effect size to students’ reasoning abilities as a proportion 1,303 (n=3, SD=0,353).

Dalam kegiatan proyek konstruksi hal-hal yang perlu diperhatikan yaitu mutu (quality) dan waktu (time). Sebuah proyek konstruksi terdiri dari lingkup pekerjaan yang spesifik, terjadwal dari performa hasil proyek yang telah ditetapkan. Tujuan dari penelitian ini yaitu untuk mengetahui faktor-faktor yang mempengaruhi mutu dan waktu pada pelaksanaan lingkup pekerjaan proyek konstruksi bangunan Gedung, untuk mengetahui seberapa besar faktor-faktor tersebut terhadap kinerja waktu pelaksanaan proyek konstruksi. Metedologi penelitian menggunakan metode kuantitatif. Data diperoleh melalui survey dengan cara pengambilan kuesioner. Responden adalah perusahaan BUMN dan Swasta di Kota Surabaya sebanyak 45 sampel. Data dianalisis dengan bantuan perhitungan metode statistik deskriptif, yaitu menganalisa data-data dari kuesioner untuk menentukan mean kemudian menghitung nilai Indeks Kepentingan Relatif (IKR). Hasil penelitian menunjukkan bahwa mutu dan waktu menentukan interval sangat berpengaruh, berpengaruh, kurang berpengaruh dan tidak berpengaruh dalam pelaksanaan lingkup pekerjaan bangunan Gedung tinggi di Kota Surabaya.

Pancasila sebagai pandangan hidup bangsa harus terus diinternalisasikan kepada diri setiap bangsa Indonesia, karena kemakmuran, kemajuan serta persatuan dan kesatuan yang hendak dicapai harus sesuai dengan nilai-nilai Pancasila dimana Pancasila bertindah sebagai ruh perjuangan, pikiran dan tindakan setiap warga negara. Meskipun Pendidikan Pancasila dan Kewarganegaraan menjadi pelajaran wajib pada jenjang persekolahan, namun diperlukan upaya lebih untuk menginternalisasikan nilai-nilai Pancasila khususnya kepada siswa dan pada umumnya kepada segenap warga sekolah, karena pada prakteknya tidak jarang PPKn dianggap sebagai pelajaran pelengkap. Dilakukannya internalisasi nilai-nilai Pancasila melalui film inspiratif berbasis nilai Pancasila pada SMA R.A Kartini Maktihan menjadi salah satu upaya penguatan karakter dan jati diri warga sekolah sebagai manusia Pancasila. Adapun beberapa bentuk keberhasilan yang didapatkan dari pengabdian ini adalah; 1) warga sekolah SMA R.A Kartini Maktihan sangat antusias saat menerima internalisasi melalui film inspiratif berbasis nilai Pancasila; 2) Internalisasi nilai Pancasila melalui film dianggap lebih mudah dipahami oleh para siswa; dan 3) antusiasme peserta didik dan guru dalam mengomentari dan memberikan pandangan terhadap isi film sangat baik. Adapun kesimpulan dari pengabdian yang dilakukan ini bahwa internalisasi nilai-nilai Pancasila melalui film inspiratif berbasis nilai-nilai Pancasila memberikan dampak positif bagi warga sekolah SMA R.A Kartini Maktihan.