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All Journal Komunikasi Fisika Indonesia Berkala Fisika Indonesia : Jurnal Ilmiah Fisika, Pembelajaran dan Aplikasinya Jurnal Fisika Unand JOURNAL ONLINE OF PHYSICS Jurnal Fisika FLUX JISTech (Journal of Islamic Science and Technology) Pascal: Journal of Physics and Science Learning
Miftahul Husnah
Universitas Islam Negeri Sumatera Utara
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Physics Social Sciences Other

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HUBUNGAN TINGKAT BERPIKIR KRITIS TERHADAP HASIL BELAJAR FISIKA SISWA DENGAN MENERAPKAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING Miftahul Husnah
PASCAL (Journal of Physics and Science Learning) Vol 1, No 2 (2017)
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (196.044 KB)

Abstract

Kemampuan berpikir kritis merupakan aspek yang sangat penting yang harus dimiliki oleh siswa dalam pembelajaran fisika, terutama dalam memecahkan permasalahan-permasalan yang membutuhkan alternatif pemecahan yang lebih mendalam yang sebenarnya tidak jauh dari permasalahan yang kita temui dalam kehidupan sehari-hari. Penelitian ini bertujuan untuk menganalisis hubungan setiap tingkat berpikir kritis terhadap hasil belajar fisika siswa. Pada penelitian ini siswa dibagi atas 3 kelompok, yaitu berpikir kritis tinggi, menengah, dan rendah. Dari hasil regresi diperoleh berpikir kritis memiliki hubungan fungsional yang signifikan terhadap hasil belajar fisika siswa pada kelompok tinggi dan menengah atau F(hitung)>F(tabel) untuk kedua kelompok tersebut, hal ini berbeda untuk kelompok tingkat berpikir kritis rendah dimana F(hitung)>F(tabel) (0,082 < 5,12) yang artinya tidak terdapat hubungan fungsional yang signifikan antara variabel berpikir kritis rendah dengan variabel hasil belajar dengan menerapkan model problem based learning (PBL) atau menunjukkan bahwa tidak memberikan pengaruh yang signifikan aspek berpikir kritis rendah terhadap hasil belajar yang diperoleh siswa. Kontribusi atau sumbangan berpikir kritis tinggi dengan hasil belajar fisika siswa untuk setiap kelompok berturut-turut adalah sebesar 85,0%, 40,7%, dan 1% sedangkan sisanya (residunya) dijelaskan oleh variabel lain yang tidak diteliti. Berdasarkan hasil analisis maka diketahui bahwa tingkat berpikir kritis siswa secara keseluruhan memiliki hubungan fungsional yang signifikan terhadap hasil belajar dengan nilai R square 0,827 atau 82,7% sumbangan berpikir kritis siswa terhadap hasil belajar yang menerapkan model PBL. Semakin tinggi tingkat berpikir kritis siswa maka semakin besar hubungan fungsional yang signifikan terhadap hasil belajar, dan juga semakin besar kontribusi/sumbangan berpikir kritis terhadap hasil belajar yang diperoleh siswa yang menerapkan model PBL. Tidak terdapat hubungan fungsional yang signifikan pada kelompok berpikir kritis rendah dengan variabel hasil belajar yang menerapkan model PBL. Kata Kunci : Berpikir kritis, hasil belajar, analisis regresi, problem based learning.
PENGARUH PENAMBAHAN AGREGAT LIMBAH BOTOL KACADAN ABU SERABUT KELAPA TERHADAP KARAKTERISTIK BATU BATA Miftahul Husnah; Abdul Halim Daulay; Siska Siska
JISTech (Journal of Islamic Science and Technology) Vol 7, No 2 (2022)
Publisher : UIN Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30829/jistech.v7i2.14663

Abstract

This study aims to (i) determine the effect of adding glass bottle waste aggregate and coconut fiber ash to the characteristics of the bricks and (ii) to determine the composition of mixing glass bottle waste aggregate and coconut fiber ash so that bricks with optimal characteristics are produced. The materials used in this study were glass powder, coconut fiber ash, and clay with a composition of glass powder, coconut fiber ash, and clay 0%:0%:100%, 5%:5%: 90%, 10% :10%:80%, 15%:15%:70%, and 20%:20%:60% with a FAS of 0.5. The process of making bricks is done manually. Characterizations carried out include: compressive strength, water absorption, and density. The addition of glass bottle waste aggregate and coconut fiber ash as a substitute for clay has an effect on the characteristics of the bricks. As the amount of glass powder and coconut fiber ash increases, the compressive strength value tends to decrease, the water absorption value tends to increase, and the density value tends to decrease. The compressive strength values in all compositions of mixing glass powder, coconut fiber ash, and clay still do not meet the SNI 15-2094-2000 standard. The value of water absorption at the composition of 5%:5%: 90% and 10%:10%:80% already meets the standards of SNI 15-2094-2000. Density values in all compositions have met the standards of SNI 15-2094-2000, except for the composition 15%: 15%: 70%. %:10%:80%.
Analysis of Mechanical Properties of Bioplastics Based on Banana Peel Starch with Variations of Rice Straw Cellulose Ety Jumiati; Miftahul Husnah; Sri Ayu Lestari
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 1 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i1.14067

Abstract

Plastic waste is a serious problem for society because it harms the environment. The manufacture of bioplastics as a substitute for conventional plastics is still being developed to produce healthy and safe plastic packaging. This study aims to see how the mechanical characteristics obtained from the manufacture of plastic from natural materials by utilizing waste plantain peels and rice straws which are commonly found in Indonesia. Variations in composition in the manufacture of bioplastics using a mass ratio of rice straw cellulose and plantain peel starch include sample A (0:2); sample B (0.25:1.75); sample C (0.5:1.5); sample D (0.75:1.25) and sample E (1:1) (w/w). The process of making bioplastics is carried out by heating all materials using a hot plate at 70℃ for 1 hour. The characterization carried out in this study was a test of tensile strength, percent elongation, and modulus of elasticity. The test results show that the bioplastic with the best composition variation is found in sample E with a tensile strength value of 114.51 kgf/cm2, an elongation test value of 3.99%, and a modulus of elasticity of 2873.97 kgf/cm2. The tensile strength test value in this study was by ASTM D882-12, which is 104.72 kgf/cm2, and the value of the modulus elasticity is close to the ASTM D882-12, which is 3163.81 kgf/cm2.KEYWORDS : bioplastic; banana peel starch; rice straw cellulose, mechanical characteristic.  
ANALISIS SIFAT MEKANIK PLASTIK BIODEGRADABLE PATI BIJI ALPUKAT DAN SELULOSA SEKAM PADI Ety Jumiati; Miftahul Husnah; Sunny Nafisah
Komunikasi Fisika Indonesia Vol 20, No 1 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.1.69-74

Abstract

Biodegradable plastics have been investigated using avocado seed starch, rice husk cellulose, chitosan, and glycerol in order to determine the mechanical characteristics of biodegradable plastics. Variations in the composition of avocado seed starch and rice husk cellulose in each sample A (100% : 0%), B (87.5% : 12.5%), C (75% : 25%), D (62.5% : 37.5%), and E (50% : 50%). The process of making biodegradable plastic is carried out using a material mixing process using a magnetic stirrer and a hot plate at a maintained temperature of  ± 70°C − 80°C and dried in an oven. Mechanical tests carried out include tensile strength, elongation, and modulus of elasticity tests. The results of the mechanical characterization test for the optimal biodegradable plastic are found in sample E (50% : 50%) with a tensile strength value of 20.6123 MPa and an elastic modulus of  353.7985 MPa which meets the ASTM D882-12 standard.
ANALISIS STRUKTUR KARAKTERISASI XRD DAN SEM PADA REDUCED GRAPHENE OXIDE (rGO) LIMBAH BAN Sandi Tri Febriani; Ety Jumiati; Miftahul Husnah
Komunikasi Fisika Indonesia Vol 20, No 1 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.1.49-54

Abstract

Research has been carried out using waste tires as the basic material for reduced graphene oxide (rGO). This research has been successfully synthesized using waste tire smoke with combustion and microwave assisted methods as a faster, easier, and safer synthesis process. The characterizations used in this research are X-ray diffraction (XRD) and scanning electron microscope (SEM). The powder is obtained through the process of capturing smoke from burning waste tires manually at a temperaturre of 300°C for 3 hours. Then it was reduced using microwave heating with variations in heating time of 20, 25, and 30 minutes. The results of the XRD characterization data showed a diffraction peak (002) peak at 2θ = 25° and a diffraction peak (101) peak 2θ = 43.9° which identified rGO and the results of the SEM characterization test obtained that the surface morfology formed a thin sheet.
PENGARUH GELOMBANG MIKRO DAN SULFUR SEBAGAI AGEN PASIVASI TERHADAP SPEKTRUM ABSORBANSI KARBON DOTS BERBASIS BAN BEKAS Ananda Tira Septiana Sari; Ety Jumiati; Miftahul Husnah
Komunikasi Fisika Indonesia Vol 20, No 2 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.2.147-152

Abstract

Used tires that are not used are usually thrown away and cause damage and environmental pollution. Information on the use of used tires is still limited, used tires are usually used in the synthesis of nanomaterials such as in the field of nanotechnology. This research was conducted to determine whether carbon dots can be synthesized from used car tires, sulfur can be used as a passivation agent in the synthesis of carbon dots, and to determine the wave absorption and fluorescence of carbon dots synthesized purely and with the addition of a passivation agent.Sulfur was used as a passivation agent with a carbon and sulfur ratio of 1:1. Microwave time variations were used 30, 35, and 40 minutes. The UV-Vis characterization of carbon dots showed a higher absorbance with variations in the length of microwave time and the addition of passivation agents. Luminance analysis with UV lamp obtained a brighter glow on karbon dots with the addition of a passivation agent.
PENGARUH PENAMBAHAN KONSENTRASI NaCl TERHADAP NILAI KELUARAN LISTRIK BIOBATERAI SARI BUAH MENGKUDU Ety Jumiati; Miftahul Husnah; Riadina Siregar
Komunikasi Fisika Indonesia Vol 20, No 2 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.2.199-204

Abstract

Biobattery is a tool that can generate electrical energy from nature that is environmentally friendly, such as noni juice with the addition of NaCl concentration (0%, 10%, 20%). The purpose of this study (i) to determine the pH of the noni juice (ii) for the electrical conductivity of the noni juice (iii) to determine the electrical voltage of the noni juice (iv) to determine the electric current of the noni juice. This study used the galvanic cell method using copper (Cu) and zinc (Zn) electrodes. Based on the results of research conducted on noni juice, the highest value was obtained for noni juice with the addition of 20% NaCl concentration with pH: 2.5, Electrical conductivity: 4915 mS/cm3, voltage: 2.32 V, electric current: 3.12 mA, electric power: 7.23 mW. It can be stated that the lower the pH value, the higher the concentration of NaCl used, the greater the voltage, current, and electrical power obtained. In this study, the ability of noni juice to turn on a white LED light for 2 hours can light up with a stable voltage drop.
Penurunan laju korosi logam aluminium, besi dan baja menggunakan inhibitor ekstrak daun jambu biji Mutiah Lubis; Masthura Masthura; Miftahul Husnah
Berkala Fisika Indonesia : Jurnal Ilmiah Fisika, Pembelajaran dan Aplikasinya Vol 14, No 2 (2023)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/bfi-jifpa.v14i2.25333

Abstract

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PERANAN AKIVATOR DAN LUAS PENAMPANG KARBON AKTIF TERHADAP KEMAMPUAN ADSORPSI KARBON AKTIF PADA MINYAK GORENG BEKAS PAKAI Miftahul Husnah; Ridwan Yusuf Lubis; Lisa Astari
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.26005

Abstract

Used oil or used cooking oil is oil that is produced from leftover frying. The high price of cooking oil and the high need for use also makes fried traders use used cooking oil continuously which has a negative impact on health. This study aims to determine the role of activators and cross-sectional area on the adsorption ability of activated carbon produced from nipa palm shells in the process of refining used oil. The sample used is used cooking oil which is then adsorbed using activated carbon with different cross-sectional areas. Analysis of the cross-sectional area shows that variations in the concentration of NaCl as an activator in the manufacture of activated carbon from nipa palm shells affect the cross-sectional area, the higher the concentration of NaCl activator, the greater the cross-sectional area of activated carbon produced. The surface area of activated carbon activated by NaCl 0M, 4M, 6M and 8M had respective values of 11.1489 m2/g, 11.4487 m2/g, 11.5028 m2/g, 11.5079 m2/g. The results show that the greater the cross-sectional area of activated carbon, the greater the ability of activated carbon to adsorb used oil, with a value of water content and volatile matter of 0.2612% - 0.1195%, peroxide of value (POV) of 11.8629 meq/g - 5.3029 meq/g, Acid Value (AV) of 1.3368 mg KOH/g - 0.5393 mg KOH/g. Optimum results were obtained on activated carbon activated with 8M NaCL activator, this was due to the increasing concentration of the activator, more pores were formed so that the absorption capacity of activated carbon also increased.
ANALISIS UJI FISIS BRIKET AROMATERAPI BERBAHAN SERAI DAN SERBUK KAYU DENGAN PEREKAT PINUS MERKUSII Ervina Putri Wulandari; Ety Jumiati; Miftahul Husnah
Indonesian Physics Communication Vol 20, No 3 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.3.247-252

Abstract

Aromatherapy briquettes have been made as an alternative fuel made from lemon grass, sawdust and pine resin. Composition variations between lemongrass and sawdust (meranti) in samples A (30% : 70%), B (40% : 60%), C (50% : 50%) with 60% pine resin adhesive with drying time 7 days. Physical test parameters carried out: density, moisture content, and heat. The test results showed that the optimum aromatherapy briquettes were sample C which had a density value of 0.954 g/cm3, a moisture content of 7.81% and a calorific value of 8640 cal/g. The value of water content and heating value complies with SNI 01-6235-2000.
Co-Authors Abdul Halim Daulay Ananda Tira Septiana Sari Ervina Putri Wulandari Ety Jumiati Jumiati, Ety Lisa Astari Masthura, Masthura Mutiah Lubis Riadina Siregar Ridwan Yusuf Lubis Ririn sagita Aruan Sandi Tri Febriani Siska Siska Sri Ayu Lestari Sunny Nafisah