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All Journal Jurnal MEKANIKAL Jurnal INSANIA Jurnal Sains dan Teknologi Jurnal Pendidikan Indonesia JURNAL PIJAR Natural B Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Jurnal Aisyah : Jurnal Ilmu Kesehatan Relativitas : Jurnal Riset Inovasi Pembelajaran Fisika Anoa : Jurnal Pengabdian Masyarakat Sosial, Politik, Budaya, Hukum. Ekonomi Jurnal Penelitian Budaya Jurnal Biofiskim: Pendidikan dan Pembelajaran IPA
Bahtiar Bahtiar
Jurusan Tadris IPA Biologi FITK IAIN Mataram
Humanities Chemistry Computer Science & IT Economics, Econometrics & Finance Education Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Veterinary

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ANALISIS FAKTOR-FAKTOR PENYEBAB KETAKUTAN SISWA TERHADAP MATA PELAJARAN FISIKA PADASISWAKELAS XI SMA NEGERI 2 MATARAM Bahtiar, Bahtiar
Jurnal PIJAR Vol 2, No 1 (2007)
Publisher : Jurnal PIJAR

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Abstract

Hasil belajar yang dicapai siswa pada umumnya dipengaruhi oleh dua faktor yaitu faktor internal dan faktor eksternal, Faktor lain yang sangat menentukan adalah faktor tujuan dan target pembelajaran, faktor guru, faktor situasi kelas, faktor murid, dan faktor metode pembelajaran. Jika faktor-faktor di atas diabaikan maka cenderung prestasi belajar siswa sangat rendah. Penelitian ini bertujuan untuk mengetahui faktor-faktor penyebab ketakutan siswa terhadap mata pelajaran fisika pada siswa kelas XI SMAN 2 Mataram. Teknik pengumpulan data dengan menggunakan angket yang sudah diuji validitas dan reliabilitas soalnya. Hasil penelitian ini diolah dengan menggunakan statistik deskriptif pada sampel 135 siswa yang di ambil secara purposive samplingmenunjukanbahwa faktor-faktor penyebab ketakutan siswa terhadap mata pelajaran fisika pada siswa kelas XI SMA Negeri 2 Mataram adalah faktor metode pembelajaran 64,44%, faktor guru 62,96%, faktor murid 55,56%, faktor tujuan dan  target  pembelajaran  53,33%,  dan  faktor  situasi  kelas  51,85%.  Ini  berarti  faktor-faktor  di  atas  harus  di laksanakan oleh seorang guru supaya tidak ada kesan siswa menganggap bahwa pelajaran fisika adalah pelajaran yang  sulit,  membosankan  dan  menakutkan.  Dari  hasil  penelitian  dapat  simpulkan  bahwa  faktor  penyebab ketakutan siswa terhadap mata pelajaran fisika pada siswa kelas XI SMAN 2 Mataram adalah faktor tujuan dan target pembelajaran, faktor guru, faktor situasi kelas, faktor murid, dan faktor metode pembelajaran.
Influence of Rice Seed Replanting Growth (Oryza sativa L.) Inpari-4 Varieties with Giving Frequency of Sound Waves Bahtiar, Bahtiar; Widodo, Chomsin S.; Santoso, Didik R.
Natural B, Journal of Health and Environmental Sciences Vol 3, No 1 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (332.459 KB) | DOI: 10.21776/ub.natural-b.2015.003.01.7

Abstract

Has done research that aims to examine the influence of sound wave frequency of rice seeds of the shoots phase. Rice seeds Inpari-4 varieties planted at four growing medium in the sterofoam box with the treatment of the different frequncies of 10 Hz, 4 kHz, 7 kHz, 30 kHz and one growing medium without sound treatment which serves as the control plants.  The test parameters were often observed as an indicator of plant, a lot of leaves, wet and dry weight of roots, root lenght, moisture content and test unison is growing. The result showed that there is a sound wave frequency value responded well by rice seed shoots in the process so that its growth into the optimal frequency of 4 kHz. 
PENGARUH MODEL PEMBELAJARAN KOOPERATIF TIPE NHT (NUMBERED HEAD TOGETHER) MENGGUNAKAN PETA KONSEP TERHADAP HASIL BELAJAR FISIKA SISWA Bahtiar, Bahtiar; Musanni, Musanni; Hapipah, Laelatul
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol 1, No 1: June 2013
Publisher : IKIP Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (337.791 KB) | DOI: 10.33394/j-ps.v1i1.518

Abstract

This study aims to determine the effect of cooperative learning type NHT (Numbered Head Together) Using Concept Map to physics learning outcomes of VIII grade students og state MTs. 3 Mataram Academic Year 2012/2013. The hypothesis proposed is there is influence of cooperative learning type NHT (Numbered Head Together) using concept map to physics learning result of VIII grade MTs 3 Mataram students Academic Year 2012/2013 Lesson. Type of research used is Quasy experiment. The population in this research is all VIII grade students of state MTs. 3 Mataram. The sample was taken by purposive sampling technique that is VIIIB class as experimental class and VIIIE class as control class in state MTs. 3 Mataram. The data was collected in study by giving pre-test and post-test to the sample class student. Data collection techniques using objective tests that have been tested for validity, reliability, difficulty index, differentiation, and spotting function. Based on the analysis results of pre-test data obtained the average value of the experimental class is 50.4 and the control class is 51.8. Post-test results showed the average experiment class is 73.51 and the control class is 62.42. The sample student's post-test data were analyzed using t-statistical calculations. Based on the result of data analysis using t-statistic obtained t count 4,13 and t table 1.99. From the results obtained t count> t table at 5% error level, this indicates that Ha accepted and Ho rejected. Based on the results of N-Gain test in the experimental class obtained an increase of 0.47 while in the control class there was an increase of 0.22. The improvement of the students' learning outcomes in the experimental class is classified into the medium category and the control class fall into the low category. Thus, the improvement of students' learning outcomes in the experimental class is higher than the control class (0.47> 0.22). This means that the application of cooperative learning model type NHT (Numbered Head Together) using concept map gave a significant contribution to physics learning outcomes of VIII grade students of State MTs. 3 Mataram on the subject of energy and effort.
PENGARUH MEDIA PENDINGIN MINYAK PELUMAS SAE 40 PADA PROSES QUENCHING DAN TEMPERING TERHADAP KETANGGUHAN BAJA KARBON RENDAH Bahtiar, Bahtiar; Iqbal, Muh.; Supramono, Supramono
Jurnal MEKANIKAL Vol 5, No 1 (2014)
Publisher : Jurnal MEKANIKAL

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Abstract

Abtstract: The Effect of Lubricating Oil SAE 40 As Cooling Media of Quencing and Tempering Processes on Strenghth of Low Carbon Steel. This study was conducted to determine the effect of  lubricating oil SAE 40 as cooling media of quenching and tempering process on the mechanical properties of low carbon steel. Quenching process is done for 7 min, 1 and 2 hours holding times at 925 ℃. Furthermore, tempering process consumes 14 minutes, 1 and and 2 hours holding times at 450 ℃. The raw material for the steel specimen is ST 42. Charpy impact test using a method based on ASTM standards E23-02. The results of impact testing the highest impact toughness values obtained for the heat treatment process then diquencing is 2033 KJ / m 2, at 925oC with a heating holding time 7 minutes, the lowest value is 523 KJ / m 2. The results of testing the highest impact toughness values obtained for the heat treatment process then diquencing and given treatment at a temperature of 450 ℃ tempering at 2607 KJ / m 2, at 925oC with a heating holding time 7 minutes and tempering holding time of 14 minutes, the lowest value is 776 KJ / m 2 , at 925oC with a heating holding time 2 hours minutes and tempering holding time is 2 hours. Keywords: queccing, tempering, cooling media, lucricating oil & strenghth
PENGARUH TEMPERATUR TUANG DAN KANDUNGAN SILICON TERHADAP NILAI KEKERASAN PADUAN Al-Si Bahtiar, Bahtiar; Soemardji, Leo
Jurnal MEKANIKAL Vol 3, No 2 (2012)
Publisher : Jurnal MEKANIKAL

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Abstract

Research on the effect of temperature and silicon content cast on the value of Al-Si alloy violence done by re-casting of the alloy Al-0.24% Si. The temperature variation with temperature castings made ​​71, 760 and 810oC. The addition of silicon content is done by adding alloys Al-0.24% Si alloy ADC 12. From the results of the study concluded that the temperature did not cast a significant influence on increasing the value of violence. Effect of the addition of silicon content increases the value of the product of violence cast Al-0, 24Si at 33.67 to 56.06 BHN on silicon content of 2.66% for a temperature of 710oC cast. Hardness value at a temperature of 760OC castings for silicon content of 0.24% by 34.59 BHN also experienced an increase in the silicon content of 2.66% to 50.81 BHN hardness value. BHN hardness value of 36.55 at a temperature of 810 OC cast for the silicon content of 0.24% increased to 54.24 BHN on silicon content of 2.66%.
SIFAT KEKERASAN DAN STRUKTUR MIKRO KOMPOSIT ALUMINIUM/ALUMINA DENGAN METODE METALURGI SERBUK Setiadi, Iwan; Hamzah, Muhammad Sadat; Bahtiar, Bahtiar
Jurnal MEKANIKAL Vol 9, No 2 (2018): Jurnal Mekanikal Juli 2018
Publisher : Jurnal MEKANIKAL

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Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh variasi temperatur sintering terhadap sifat kekerasan Brinell dan struktur mikro komposit aluminium/alumina. Material yang digunakan dalam penelitian ini adalah serbuk dan alumina merek Nippon Light Metal. dengan komposisi (% fraksi berat) Al₂O₃ 99,7%, CaO 0%, Fe₂O₃ 0,009%, MgO 0%, Na₂O 0,03%, K₂O 0%, SiO₂ 0,01%, TiO₂ 0%, H₂O 0,26%, LOI 0,03 %.Dalam penelitian ini serbuk aluminium sebagai matriks dan serbuk alumina sebagai penguat,  proses pembuatan spesimen serbuk alumina di kalsinasi dengan temperatur 200OC, selanjutnya alumina yang telah dikalsinasi diayak dengan mesin sieve shaker untuk mendapatkan serbuk halus dengan menggunakan empat ukuran ayakan yaitu 90, 75, 63 dan 53 µm, selanjutnya serbuk aluminium/alumna dimixing selama 180 menit menggunakan mixer tabung dengan komposisi aluminium 94% yang ditambahkan alumina 6% dengan penambahan alkohol untuk penghomogenannya. Pembentukan sampel dengan cara kompaksi dengan menggunakan metode uniaksial pada tekanan 260 Mpa, kemudian disinter dengan variasi temperatur 450OC, 475OC dan 500OC, ditahan selama 30 menit dengan laju kenaikan suhu 10OC permenit. Pengujian yang dilakukan meliputi, pengujian kekerasan Brinell dan struktur mikro.Hasil pengujian menunjukkan bahwa semakin rendah teperatur sintering akan meningkatkan nilai kekerasan metode Brinell bahan Al 94% + Al2O3 6% dengan suhu sintering 450OC diperoleh nilai kekerasan tertinggi yaitu 1.325 BHN nilai kekerasan pada suhu 475OC diperoleh nilai kekerasan 0.465 BHN dan nilai kekerasan paling rendah pada suhu 500OC yaitu 0.441 BHN. Selain itu peningkatan suhu sintering akan berpengaruh terhadap bahan aluminium karena peningkatan suhu sintering kemudian diikuti pendinginan secara perlahan akan berakibat menurunkan nilai kekerasan aluminium.Kata kunci : Keramik, alumina, kekerasan, kompaksi, mixing, sintering, struktur mikro
Hubungan antara Kecerdasan Emosional dengan Prestasi Belajar Siswa Kelas II SMA Negeri 2 Mataram Bahtiar, Bahtiar
INSANIA : Jurnal Pemikiran Alternatif Kependidikan Vol 14 No 2 (2009)
Publisher : Fakultas Tarbiyah dan Ilmu Keguruan IAIN Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1465.864 KB) | DOI: 10.24090/insania.v14i2.330

Abstract

From a recent research in psychology, revealed that IQ is not only factor that affect learning performance. One of other factor is emotional intelligence (EQ). This article explore the relation between EQ and learning performance, based on survey at 2nd grade State High school (SMAN 2) Mataram. Emotional intelligence is one’s capability to recognize and manage emotion, self-motivation, recognize others emotion (empathy), and ability to build relation (cooperation) with others. Learning performance is learning outcome from learning activity that measured and rated academically at report figure. SQ scale used here based on Daniel Goleman theory. The result is that there are relation between emotional intelligence and learning performance. 
PENGARUH MODEL PEMBELAJARAN INKUIRI TERBIMBING PADA PEMBELAJARAN FISIKA UNTUK MENINGKATKAN HASIL BELAJAR SISWA Nurfarida, Nurfarida; Bahtiar, Bahtiar; Ernita, Nevi
Relativitas: Jurnal Riset Inovasi Pembelajaran Fisika Vol 2, No 2 (2019): Jurnal Riset Inovasi Pembelajaran Fisika
Publisher : Department of Physics Education, Faculty of Teacher Training and Education, UNIVERSITAS MA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/relativitas.v2i1.1790

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran inkuiri terbimbing terhadap hasil belajar siswa fisika pada materi momentum dan impuls di SMA Negeri 8 Mataram Tahun Pelajaran 2018/2019. Teknik pengambilan sampel menggunakan Sluster Random Samling. Jenis penelitian yang digunakan adalah quasi eksperimental design dengan desain penelitian pretest-posttest control grup desain. Berdasarkan hasil analisis data dalam penelitian ini dengan menggunakan uji-t diperoleh ttabel = 2,021 dan thitung = 8,35, maka diketahui nilai thitung (8,35)  ttabel (2,021) dengan dk yang besarnya dk = n1 + n2 - 2 dengan taraf signifikansinya 5%. Karena thitung lebih besar dari ttabel pada taraf sisgnifikan 5% maka H0 ditolak dan Ha diterima. Hasil penelitian ini, menunjukkan bahwa secara signifikan terdapat pengaruh model pembelajaran inkuiri terbimbing pada peningkatkan hasil belajar fisika siswa pada materi momentum dan impuls di SMA Negeri 8 Mataram Tahun Pelajaran 2018/2019.
ANALISIS MISKONSEPSI TENTANG KEMAGNETAN PADA SISWA MTs ISHLAHUL MUSLIMIN SENTELUK KELAS IX TAHUN AJARAN 2018/2019 Nur'aini, Nur'aini; Didik, Lalu A; Bahtiar, Bahtiar
Relativitas: Jurnal Riset Inovasi Pembelajaran Fisika Vol 3, No 1 (2020): Jurnal Riset Inovasi Pembelajaran Fisika
Publisher : Department of Physics Education, Faculty of Teacher Training and Education, UNIVERSITAS MA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/relativitas.v2i2.2022

Abstract

Penelitian ini bertujuan untuk mengetahui: (1) pemahaman konsep siswa terhadap magnet, (2) miskonsepsi siswa yang terjadi pada konsep magnet, (3) menganalisis miskonsepsi siswa yang terjadi pada materi magnet. Jenis penelitian yang digunakan adalah penelitian deskriptif dengan menggunakan metode deskriptif kualitatif yang di dalamnya menjelaskan hasil dari suatu penelitian. Hasil analisis data menunjukkan bahwa rata-rata persentase miskonsepsi sebagai berikut: pada paham konsep sebesar 14,38%, miskonsepsi sebesar 25,17%, miskonsepsi (false positif) sebesar 15,21%, miskonsepsi (false negative) sebesar 11,82%, menebak sebesar 4,22% dan untuk yang tidak paham konsep sebesar 28,43%. Siswa masih banyak mengalami miskonsepsi pada materi, pengertian magnet, jenis-jenis magnet, interaksi benda ketika di dekatkan dengan magnet, pembuatan magnet, sifat-sifat magnet, garis gaya dan medan magnet, elektromagnetik, dan gaya Lorentz
SINTESIS DAN ANALISIS KANDUNGAN MINERAL DAN KARAKTERISTIK SIFAT LISTRIK NANOPARTIKEL PASIR BESI PANTAI TELINDUNG KABUPATEN LOMBOK TIMUR Asri, Laelatul; Didik, Lalu A.; Bahtiar, Bahtiar
JST (Jurnal Sains dan Teknologi) Vol 10, No 1 (2021)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (304.831 KB) | DOI: 10.23887/jst-undiksha.v10i1.22765

Abstract

This study aims to determine the mineral content as well as the characteristics of the electrical properties of the iron sand nanoparticle samples of the Telindung beach. Synthesis of iron sand nanoparticles can be done by sharing one method, namely the coprecipitation method. In the coprecipitation process, researchers used HCl and NH4OH solutions to make a sample of nano-sized iron sand (nanoparticles) of 5 samples with different sampling distances of 3 meters, 6 meters, 9 meters, 12 meters, and 5 meters. Each finished sample is then analyzed for its mineral content using AAS. The results shows that the higher the sampling distance, the higher the mineral content, namely the total Fe in the sample of iron sand nanoparticles (8.28%, 8.79%, 8.85%, 9.07% and 9.74%). Characteristics of electrical properties namely resistivity using 4 point probes with a series of power supply devices and multimeters by making 1 sample 5 times the measurement so that the value of resistivity (8.3 x 104 ,m, 9.1 x 104 Ωm, 9.6 x 104 Ωm, 10 Ωm, 3 x 104 Ωm, 11.3 x 104 Ωm), for dielectricity using a plate parallel to the LCR meter, one sample of 10 times the measurement so as to obtain the value of the dielectric constant (6.4 x 104 F, 7.9 x 104 F, 9 , 8 x 104 F, 11.6 x 104 F and 13.1 x 104). So it can be said that the higher the value of minerl candlengan that is the total Fe, the higher the value of the characteristic electrical properties are resistivity and dielectricity.
Co-Authors Alimin Alimin, Alimin Anak Agung Istri Sri Wiadnyani Asri, Laelatul Chomsin S. Widodo Damsid, Damsid Didik R. Santoso Ernita, Nevi Hapipah, Laelatul Hidayati Hidayati La Ode Dirman, La Ode Lalu A Didik Leo Soemardji Muh. Iqbal Muhammad Sadat Hamzah Munsir, Munsir Musanni Musanni, Musanni Musmulyadi, Musmulyadi Nur'aini, Nur'aini Nurfarida, Nurfarida Ridwan, Harnina Safilu Safilu SATRIYAS ILYAS Suharty Roslan, Suharty Talib, Muhammad Thabran Tawulo, Megawati A. Wahyudi, Farizal