MES (Journal of Mathematics Education and Science) ISSN: 2528-4363
PERSAMAAN DIFFERENSIAL EKSAK DENGAN FAKTOR INTEGRASI
Rosliana Siregar
Dosen Koopertis Wil I Dpk FKIP-UISU
Abstrak. Penelitian ini bertujuan untuk mengetahui hubungan persamaan differensial tak eksak dengan faktor integrasi. kajian penentuan faktor integrasi pada persamaan diferensial eksak dengan menggunakan langkah-langkah penyelesaian dari persamaan differensial. Persamaan diferensial eksak memiliki kasus persamaan diferensial tak eksak, di mana persamaan diferensial tak eksak ini dapat di ubah menjadi persamaan diferensial eksak. Dalam hal ini diperlukan konsep faktor integrasi untuk menyelesaikannya, sehingga dari persamaan diferensial tak eksak dapat di ubah menjadi persaman diferensial eksak. Hasil pembahasan dari penelitian ini membuktikan adanya hubungan antara persamaan diferensial eksak dengan faktor integrasi.
Kata Kunci: Persamaan Differensial Eksak, Tak Eksak, Faktor Integrasi
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MES (Journal of Mathematics Education and Science) ISSN: 2579-6550 (online) 2528-4363 (print)
Vol. 3, No. 1. Oktober 2017
PENGARUH PENGGUNAAN MEDIA KOMIK MATEMATIKA DENGAN BANTUAN POWERPOINT TERHADAP MOTIVASI DAN HASIL BELAJAR MATEMATIKA SISWA DI SMK ISTIQLAL DELITUA
Putri Amanda Siregar1, Rosliana Siregar2
1Program Studi Pendidikan Matematika FKIP Universitas Islam Sumatera Utara
2Dosen Koopertis Wil. I. Dpk FKIP Universitas Islam Sumatera Utara
Abstrak. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan media komik matematika dengan bantuan powerpoint terhadap motivasi dan hasil belajar matematika pada pokok bahasan invers matriks ordo 2×2. Penelitian ini dilaksanakan di SMK Istiqlal Delitua. Populasi pada penelitian ini berjumlah 486 orang siswa kelas X. Pengambilan sampel dengan mengunakan teknik purposive sampling berjumlah 35 orang siswa kelas X.AP-1. Berdasarkan hasil uji persyaratan diketahui bahwa data motivasi maupun hasil belajar matematika siswa berdistribusi normal. Data motivasi dengan skor rata-rata 99,2 sedangkan data hasil belajar matematika siswa dengan skor rata 19,6. Berdasarkan hasil analisis data dapat disimpulkan bahwa: (1) media komik matematika berpengaruh positif dan signifikan terhadap motivasi belajar matematika. Dimana hasil uji t diperoleh thitung = 3,1914 ˃ ttabel = 1,692. Indeks determinasi I = 12,5%, artinya dimana media komik matematika menyumbang 12,5% terhadap motivasi belajar matematika; (2) media komik matematika berpengaruh positif dan signifikan terhadap hasil belajar matematika. Berdasarkan hasil uji t diperoleh thitung = 6,19 ˃ ttabel = 1,692. Indeks determinasi I = 53,77%, artinya dimana media komik matematika menyumbang 53,77% terhadap hasil belajar matematika siswa.
Kata Kunci: media komik matematika, motivasi belajar, hasil belajar
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Proceeding The 7th International Conference on Multidisciplinary Research 2018 (ICMR 2018) September 5-6, 2018 at Universitas Islam Sumatera Utara
The Development of Reasoning Ability and Self Efficacy of Students through Problem-Based Learning Model
Muhammad Daut Siagian, Rosliana Siregar, and Metrilitna Br. Sembiring
Universitas Islam Sumatera Utara, Jl. Sisingamangaraja. Teladan-Medan. Medan. Indonesia
Keywords: Reasoning ability, Self-Efficacy, Problem Based Learning.
Abstract: This study aims to determine the development of reasoning ability and self-efficacy of students through Problem Based Learning model. The population in this study is all students of grade XI Prayatna High School Medan and sampling is done by purposive sampling so that selected class XI IPA-1 as the experimental class and class XI IPA-2 as the control class. This type of research is a quasi-experiment. From the test data obtained, the sample comes from a population that has a homogeneous variance and normal distribution. This research was analyzed by using two way ANAVA test. The results showed that the development of: (1) the students’ reasoning ability using Problem Based Learning model is better than the conventional model with the value of F arithmetic for learning equal to 119,653 with significance 0,000 < 0,05, (2) self-efficacy of student by using model Problem Based Learning is better than the conventional model with the value of F arithmetic for learning of 11.392 with significance 0.001 < 0.05.
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INFOTEKJAR : JURNAL NASIONAL INFORMATIKA DAN TEKNOLOGI JARINGAN- VOL. 4 NO. 1 (2019) EDISI SEPTEMBER
Optimalisasi Penjadwalan dengan Analisis Jaringan Kerja pada Kegiatan Verifikasi
Koleksi Buku di Perpustakaan Sekolah
Muhammad Daut Siagian, Rosliana Siregar, Evi Adelina Nasution
Program Studi Pendidikan Matematika Uiversitas Islam Sumatera Utara, Jl. Sisingamangaraja, Teladan – Medan, 20217, Indonesia
A B S T R A K
Penelitian ini membahas mengenai kegiatan verifikasi koleksi buku (stock opname) yang dilakukan di perpustakaan sekolah SMA Negeri 2 Medan. Metode yang digunakan untuk mengoptimalkan waktu penyelesaian kegiatan tersebut dengan network planning (analisa jaringan kerja) yaitu menerapkan Critical Path Method atau metode lintasan kritis. Hasil yang diperoleh dari pembahasan menunjukkan waktu optimal (waktu terpendek) untuk menyelesaikan kegiatan verifikasi koleksi buku tersebut adalah selama 41 hari dengan perkiraan waktu normal.
KEYWORDS : Analisis Jaringan Kerja, Critical Path Method (CPM), Verifikasi Koleksi Buku.
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International Seminar on Applied Mathematics and Mathematics Education 2019
Mathematical connection ability: teacher’s perception and experience in learning
Rosliana Siregar1 and Muhammad Daut Siagian2
1, 2Mathematics Education Study Program, Universitas Islam Sumatera Utara, Jl.
Sisingamangaraja – Teladan, Medan 20217, Indonesia
Abstract. In learning mathematics mathematical connections ability is one of the mathematical
ability that must be possessed by students. The strong connection between concepts in mathematics implies that mathematical connections ability also contains other mathematical
aspects or vice versa. Viewing mathematics as a whole is very important in learning and thinking
about connections between topics in mathematics. This study uses qualitative research methods
with phenomenology research design types. The participants in this study were 8 middle school
mathematics teachers who taught at different schools. This study uses a short interview form
which consists of five open questions to determine the teacher’s understanding of mathematical
connection ability. It was found that middle school math teachers had sufficient comprehensive
and adequate knowledge of their views on mathematical connection ability, moreover there were
also respondents who could not provide examples of mathematical problems that contained the
characteristics of mathematical connection ability even though they were able to define what
mathematical connection is. Likewise, the development of teachers in mathematical connection
ability in learning is still limited to the scope of the relationship of mathematics with mathematics
itself and mathematics with everyday life.
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IJLRES – International Journal on Language, Research and Education Studies
ISSN: 2580-6777 (p); 2580-6785 (e) Vol. 2, No. 2, 2018
THE EFFECT OF SELF-CONCEPT ON THE MATHEMATICS LEARNING ACHIEVEMENT
Rosliana Siregar, Fadhilla Humairo
Department of Mathematics Education, Faculty of Education and Teachers Training
Islamic University of North Sumatra, Indonesia
Roslianasrg20@gmail.com
Abstract. This study aims to determine the effect of self-concepts on mathematics learning
achievement of students of class X at State Senior High School 14 Medan. The population in this
study is all students of class X State Senior High School 14 Medan which amounted to 304
students. Technique of sampling using technique of Proportionate Stratified Random Sampling
counted 40 student for research sample. Data collection using questionnaire method and
documentation method. Data analysis technique used is regression analysis, correlation analysis
and t test with significance level of 5%. Testing data in this study using the help of SPSS 15 for
Windows program for each test result. The results showed that there is a significant influence
between self-concept and mathematics learning achievement obtained from the t count (3,572)>
t table (1.68), with a probability significance of 0.01 <0.05. The magnitude of the determination
coefficient of 25.1%.
Keywords : Self-Concept, Mathematics Learning, Achievement
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Prosiding Seminar Nasional Pendidikan Biologi (ISBN: 978-602-61265-2-8), Juni 2018
ANALISIS POPULASI LIKEN MAKRO EPIFITIK SEBAGAI BIOINDIKATOR KUALITAS UDARA DI KAWASAN TERMINAL PINANG BARIS KOTA MEDAN
Ashar Hasairin1) , Rosliana Siregar2)
1) Program Studi Biologi FMIPA Universitas Negeri Medan, Medan
2)FKIP Universitas Islam Sumatera Utara, Medan
E-mail: nst.ashar@yahoo.com (correspondence author)
ABSTRAK
Penelitian ini bertujuan untuk mengetahui populasi liken, hubungan konsentrasi Pb dan Cr pada talus liken di tegakan pohon mahoni dengan kepadatan lalu lintas di Kawasan Terminal Pinang Baris Medan. Jenis penelitian ini adalah deskriptif dengan metode survey eksploratif. Penelitian ini telah mengabil 3 titik lokasi penelitian yaitu 1). Jl. TB Simatupang, 2). Jl. Pinang Baris dan 3). Jl.Swadaya. Desain penelitian ini menggunakan korelasi pearson product moment. Parameter yang diamati adalah jumlah kadar Pb dan Cr serta jumlah kepadatan lalu lintas. Hasil penelitian diperoleh jenis liken yang memiliki kadar timbal (Pb) dan Krom (Cr) paling tinggi adalah jenis liken dengan jumlah kendaran yang tinggi juga. Terdapat hubungan tidak signifikan antara kandungan Pb pada talus liken dengan kepadatan lalu lintas dengan nilai r =0,11.Korelasi sangat rendah, berkorelasi positif tidak signifikan. Dengan perhitungan menggunakan analisis Pearson Product Momment diperoleh t hitung (0,28) ≤ dari t tabel (1,895),adanya hubungan Pb pada talus liken dengan kepadatan lalu lintas. Sedangkan Korelasi Cr pada masing-masing talus liken dengan kepadatan lalu lintas yang diperoleh sebesar 0,08 positif signifikan. Dengan perhitungan menggunakan analisis Pearson Product Momment diperoleh t hitung (2,6) ≥ dari t tabel (1,895) maka dapat dikatakan terdapat hubungan positif yang signifikan antara kepadatan lalu lintas terhadap kandungan setiap spesies pada talus liken.
Kata kunci: populasi, lichenes, bioindikator, terminal
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The 4th International Seminar on Sciences
The analysis of level of lead (Pb) on lichens as a bioindicator of air quality in Medan Industrial Area and Pinang Baris Integrated Terminal in Medan, Indonesia
A Hasairin1 and R Siregar2
1Department of Biology, Faculty of Mathematics and Natural Sciences, State University of Medan, Jl. Willem Iskandar Pasar V Medan Estate 20221, Medan, Indonesia
2 Faculty of Teacher Training and Education, Islamic University of Sumatera Utara, Jl. Sisingamangaraja, Teladan, Medan, Indonesia
E-mail: nst.ashar@yahoo.com
Abstract. This study aimed to investigate the diverse types of lichens in Medan Industrial Area
and Pinang Baris Integrated Terminal in Medan. The study was conducted for five months,
starting from May to September 2016. It was a descriptive study, with a purposive sampling
method. The research results showed that there were differences found in the lichens diversity
in the two research locations. While the diversity index values (H ‘) in Medan Industrial Area
(0.13904) was low, the diversity index values in Pinang Baris Integrated Terminal (1.00572)
were categorized as a medium. In the two research locations, seven types of lichens were
found, consisting of six genus. The distribution pattern of lichens in Pinang Baris Integrated
Terminal was clumped with the highest value of 12,96 on the type of Graphis scripta. The
three types of lichens found in Pinang Baris Integrated Terminal have a clumped distribution
pattern with the highest value of 12.96 in Graphis scripta, while the other three types of
lichens with a uniform distribution pattern 0.43 on the type of Ochrolechia tartarea and
Opegrapha atra. The physical-chemical factors of the environmental condition which
supported the growth and the development of lichens in Medan Industrial Area and Pinang
Baris Integrated Terminal were the average temperature (30.75°C and 30°C), average humidity
(75.75% and 73.25% ), light intensity (371 J and 500 J), and wind speed (1,6 m/s and 2,1 m/s).
The accumulated Pb had a very high in thallus Ochrolecia tartarea (26,96 mcg/gram). The
correlation between Pb lichens and the traffic density showed that Parmelia saxatilis had a
very high significant correlation, compared with the other types..
Keyword : Diversity, lichens, industrial area, and terminal
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Water Air Soil Pollut (Springer)
Accumulation of Lead (Pb) in the Lichen Thallus of Mahogany Trees in Medan City Road
Ashar Hasairin1 & Nursahara Pasaribu2 & Rosliana Siregar3
1Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, Jl. Willem Iskandar, Pasar V Medan Estate, Medan 20221, Indonesia
2Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Sumatera Utara, Jl. Bioteknologi No. 1, Medan 20155, Indonesia
3Department of Mathematics, Faculty of Teacher Training and Education Sciences, Universitas Islam Sumatera Utara, Jl. Sisingamangaraja, Teladan, Medan 20216, Indonesia
Abstract. Rapid growth of vehicles in Medan, Indonesia, is one of the causes in the increasing of air pollution, in which approximately 85% is contributed merely by vehicles. On the other hand, the use of lead-based fuel in motor vehicle increases the air contamination in Medan. This study aimed to obtain an accumulation of lead (Pb) in the thallus of lichens in mahogany trees in four different locations in Medan, Sumatera Utara, Indonesia, in which the lichens act as a bioindicator of air contamination as well as measuring the lichen’s lead correlation and traffic densities. Purposive sampling location was determined based on the traffic density level with different air pollutions; the location which was far from traffic circulation was used as the control. The analysis of Pb was conducted using atomic absorption spectrophotometry (AAS). The data were analyzed descriptively to discover and compare Pb accumulation between each location with different traffic density
levels. The result showed that there were 11 species of 7 genera and 7 families with two types of the thallus (foliose and crustose) in mahogany trees. The traffic density level influenced the diversity of lichens as the traffic density was quite significant with the number of lichen types. The levels of Pb and traffic density correlated very significantly at the level of α = 0.01 for Parmelia saxatilis, Lepraria incana, and Pertusaria amara type, while Opegrapha atra had a significant correlation. The accumulation of Pb in the thallus of Pertusaria amara ranged from 5.23 to 15.07 μg/g, whereas medium in Lepraria incana ranged from 1.19 to 4.88 μg/g. Thus, Pertusaria amara which had greater Pb level than Lepraria incana had the potential as a resistant bioindicator. The correlation analysis of Pb levels and traffic density showed that Pertusaria amara had a significantly high correlation compared with Parmelia plumbea, Parmelia glabratula, and Graphis scripta. Furthermore, Lecanora conizaeoides was a tolerant bioindicator of air pollution whereas Parmelia
saxatilis had the potential to be a tolerant bioindicator.
Keywords : Accumulation of Pb .Thallus.Lichens.Tree stands
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Jurnal Pengabdian Kepada Masyarakat, Vol. 20, No. 75 (2014)
Penggunaan Metode Mind Mapping terhadap Prestasi Belajar Siswa
(Rosliana Siregar)
Abstrak
Mind mapping (pemetaan pikiran) diadopsi untuk mencapai hasil pembelajaran yang baik. Peta pikiran ini menggambarkan ide menjelaskan, menerangkan defenisi dari suatu materi dan mencari solusi pada suatu masalah. Menempatkan informasi keluar dari otak dan mengambil informasi keluar dari otak merupakan cara yang tepat untuk mencatat materi yang kreatif dan efektif. Peta pikiran di terapkan dan digunakan untuk member pandangan secara keseluruhan pada suatu pokok permasalan dan membantu dalam mengingat, mendapatkan ide, yang pasti memunculkan kreatifdan inovatif.
Kata kunci : mind mapping, ide, kreatif, efektif, inovatif
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Jurnal Penelitian Bidang Pendidikan, Vol. 18 No. 2 (2012)
PENGARUH STRATEGI PEMBELAJARAN DAN MOTIVASI BERPRESTASI TERHADAP HASIL BELAJAR MATEMATIKA
Abstract
Analysis of Vegetation Lichens of Corticolous on the Styrax Sp. in Aek Nauli Forest Simalungun and Tahura, Karo North Sumatera, Indonesia
Ashar Hasairin1,*, Tri Harsono1, Rosliana Siregar2
Abstract
Other research aims to obtain data on vegetation analysis of species lichens in Aek Nauli-Forest and TAHURA, Karo North Sumatera. This study transect method, determination of tree stands in purpossive sampling with exploratory surveys and inventories, is descriptive. The results showed a high diversity and obtained 22 species of lichens, the 19 species in Aek Nauli and 14 species in TAHURA. Thallus lichens forms encountered on two locations: crustose, foliose and fruticose. Data analysis Relative Density (RD) of Vegetation Relative Frequency (FR) Relative Dominance (RDm) and Importance Value (IV), the highest for Aek Nauli consecutive Pyrhospora quernea the type (25.56%, 15.52%; 25,56% and 68.63%). Data analysis of RD; FR; RDm and IV for the highest consecutive Tahura the type of Pertusaria amara (24.80%, 21.05%, 24.80% and 70.64%). Almost all types of lichens both locations showed clumped distribution pattern and one type which shows a random distribution pattern. Through measurements of physico-chemical factors on the standing tree Styrax sp. Aek Nauli obtained in air temperature, air humidity and light intensity on average (22.90C, 60%; 827.1 Joules). While in the TAHURA, has a temperature, humidity and light intensity on average (21.20C; 77.9%, 894.4 Joules).
Keywords : vegetation lichens corticolous styrax
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ANALISIS KESULITAN BELAJAR SISWA DALAM MENYELESAIKAN SOAL MATRIKS
Rosliana Siregar1, Suwanto2, Muhammad Daut Siagian
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Analisis keefektifan lembar kerja berbasis model pembelajaran think pair share dalam meningkatkan kemampuan koneksi matematis
Rosliana Siregar, Muhammad Daut Siagian1, Suwanto
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The relationship of students’ prior knowledge and emotional intelligence to mathematical connection ability
Muhammad Daut Siagian 1, Suwanto 2, , Rosliana Siregar 1
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Desain modul pembelajaran matematika berbasis high order thinking skills pada materi matriks kelas XI SMA
Syahruni Rahmida Abdul, Rosliana Siregar, Dhia Octariani
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DESIGNING LECTORA INSPIRE – BASED MATRIX LEARNING MATERIAL FOR SENIOR HIGH SCHOOL STUDENT AT GRADE XI
Nurul Hamdinesha1, Rosliana Siregar2, Syahlan3
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