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All Journal Komunikasi Fisika Indonesia Jurnal Fisika Unand BULETIN FISIKA JOURNAL ONLINE OF PHYSICS ZERO : Jurnal Sains, Matematika dan Terapan Jurnal Redoks Zero : Jurnal Sains, Matematika, dan Terapan Fisitek : Jurnal Ilmu Fisika dan Teknologi Jurnal Kumparan Fisika Jurnal Ilmu dan Inovasi Fisika
Jumiati, Ety
Universitas Islam Negeri Sumatera Utara
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics

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MODEL OF SPREAD CONTENT DISEASE FOR ASSOCIATION OF VACCINE Jumiati, Ety; Husein, Ismail
ZERO: Jurnal Sains, Matematika dan Terapan Vol 4, No 2 (2018): July - Desember
Publisher : UIN Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (310.556 KB) | DOI: 10.30829/zero.v4i2.3166

Abstract

Transmission of infectious diseases in epidemiological models is usually based on the assumption that populations in random mixing. However, in reality this assumption is not fulfilled, because each individual has a limited set of contacts that they can pass through infection; the ensemble of all such contacts forms a complex network. Knowledge of network structure allows a model to calculate the dynamics of an epidemic at a population scale from individual level infection behavior. This paper discusses mathematical models to illustrate the epidemic pattern of transmission of infectious diseases in dynamic networks based on compartment systems.
MODEL OF SPREAD CONTENT DISEASE FOR ASSOCIATION OF VACCINE Jumiati, Ety; Husein, Ismail
ZERO: Jurnal Sains, Matematika dan Terapan Vol 2, No 2 (2018): Zero: Jurnal Sains Matematika dan Terapan
Publisher : UIN Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (310.556 KB) | DOI: 10.30829/zero.v2i2.3166

Abstract

Transmission of infectious diseases in epidemiological models is usually based on the assumption that populations in random mixing. However, in reality this assumption is not fulfilled, because each individual has a limited set of contacts that they can pass through infection; the ensemble of all such contacts forms a complex network. Knowledge of network structure allows a model to calculate the dynamics of an epidemic at a population scale from individual level infection behavior. This paper discusses mathematical models to illustrate the epidemic pattern of transmission of infectious diseases in dynamic networks based on compartment systems.
MANUFACTURE OF LIGHTWEIGHT CONCRETE BASED ON ORGANIC WASTE Ety Jumiati; Masthura Masthura
FISITEK: Jurnal Ilmu Fisika dan Teknologi Vol 2, No 1 (2018)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (316.5 KB) | DOI: 10.30821/fisitek.v2i1.1543

Abstract

The making of lightweight concrete for lightweight construction materials has been conducted with raw materials based on organic waste from households. The purpose of this study was to utilize household organic waste as aggregate for the manufacture of lightweight concrete. The materials used consist of organic waste, sand, cement, and latex resin with the variation of organic waste composition are 0, 25, 50, 75, and 100% by volume and the addition of latex resin are 10, 12, and 14% by volume. Test parameters performed include density, water absorption, shrinkage, compressive strength, tensile strength, and flexural strength. The result showed that the optimal composition of produced concrete are 25% by volume of waste and 12% by volume of latex resin with the density = 1.46 g/cm3, water absorption = 26.70%, shrinkage = 0.143%, compressive strength = 7.10 MPa, tensile strength = 2.10 MPa, and flexural strength = 2.67 MPa.Keywords: Latex, lightweight concrete, and organic waste.
PHYSICAL PROPERTIES AND MICROSTRUCTURE OF PARTICLE BOARDS BASED ON PALM OIL PALM EMPTY FRUITS AND BAMBOO POWDER WITH A MIXED ADHESIVE OF GAMBIR AND UREA FORMALDEHYDE Nanda Putri Afrilda; Ety Jumiati; Abdul Halim Daulay
FISITEK: Jurnal Ilmu Fisika dan Teknologi Vol 5, No 1 (2021)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/fisitekfisitek.v5i1.9707

Abstract

This test was carried out to reduce waste in coconut empty fruit bunches and to determine the characteristics and microstructure of the particle board surface.  The samples used consisted of bamboo powder and oil palm empty fruit bunches with gambier adhesive and urea formaldehyde with variations including: 10%:75%:15%:11%;  20%:65%:15%:11%, 30%:55%:15%:11%, 40%:45%:10%:11%.  The particleboard was printed and pressurized using a hot press of 16kg/cm2 for 15 minutes at a temperature of 120 oC, with a drying time of 14 days.  The test parameters include: density, moisture content, thickness expansion, and microstructural analysis using SEM (Scanning Electron Microscopy) which refers to SNI 03-2105-2006.  The characterization of particleboard produced in the density test is 0.66-0.74 g/cm3, the water content value is 2.4-6.9%, the thickness expansion value is 7.2-12%.  Based on the percentage value of the density of the resulting particleboard is a medium density particleboard.
Analysis Of The Mechanical Properties Of Brick With The Addition Of Cotton Ety Jumiati; Nita Zahara Nasution; Abdul halim Daulay
FISITEK: Jurnal Ilmu Fisika dan Teknologi Vol 4, No 2 (2020)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/fisitekfisitek.v4i2.9886

Abstract

AbstractIt has been done making bricks with the addition of cotton.Variations in the mixture of cement, sand and cotton are sample A (30%:70% :0%), sample B (30%:69,5%:0,5%), sample C (30%:69%:1%), sample D (30%:68,5%:1,5%), Water Cement Factor of 0,5 and dry time one day. Characteristic of the tests carried out include: compressive strength and fracture strength.Analysis of the mechanical properties of the bricks produced in sample A with a compressive strength value = 28.81 kg/cm2 and fracture strength value = 23.11kg/cm2, sample B with acompressive strength value = 26.85 kg/cm2 and fracture strength value = 22.32 kg/cm2, sample C with a compressive strength value = 25.10 kg/cm2 and fracture strength value = 15.09 kg/cm2, sample D with a compressive strength of 17.14 kg/ cm2 and a fracture strength value 15.51kg/cm2. The bricks produced namely in sample B.Keywords :Bricks, Cotton, and Cement
analysis of mechanical properties of ceiling boards based on corn cobs and coconut coir waste with latex adhesive ety Jumiati; ufik eliati tumanggor; Abdul halim daulay
FISITEK: Jurnal Ilmu Fisika dan Teknologi Vol 5, No 2 (2021)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/fisitekfisitek.v5i2.10003

Abstract

AbstractCeiling evelopment by utilizing waste corn cobs, coconut coir with gypsum flour an the adition of latex adhesive. Variations in the composition of the mixture of corn cobs, coconut coir, gypsum flour with latex adhesive include sample A (0:0:100:15), sample B (3:3:94:15), sample C (6:6:88:15), sample D (9:9:82:15), sample E (12:12:76:15), and sample F (15:15:70:15) with emphasis using a hot press and drying for 28 days. The test parameters include flexural strength and fracture strength. The test results show that sample B in the composition (3:3:94:15) is the optimal result. In this composition, the resulting ceiling board has the characteristics of a flexural strength of 3966,39 kgf/cm2 and a fracture strength of 1088,6 kgf/cm2.Keyword : Lateks , Ceiling Board, Coconut Coir, Corn Cob 
RELATIONSHIP BETWEEN VOLTAGE AND STRONG ELECTRIC CURRENT ON 1.5 VOLT BATTERIES WITH ADDING CASSAVA LEAVES ety jumiati; abdul halim daulay; asnitha aritonang
FISITEK: Jurnal Ilmu Fisika dan Teknologi Vol 4, No 2 (2020)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/fisitekfisitek.v4i2.9691

Abstract

Biobattery research has been carried out using cassava leaves (Manihot Utilissima) as a substitute for carbon in some 1.5 volt batteries. And tested the voltage with the results of sample A: 1.53 volts; B: 1.54 volts; C: 1.55 volts; and D: 1.58 volts. Then the electric current was also tested with the values obtained in sample A: 0.08 mA; B: 0.10 mA; C: 0.13 mA; and D: 0.19 mA. If the carbon mass in the biobattery gets higher, the value of the voltage and electric current test results changes with the higher in each sample. By performing the performance on the cassava leaf biobattery, it is able to turn on a 2.5 watt LED lamp with 3 batteries. Keywords: Current, cassava leaves, and voltage
Analysis of the physcial properties of particleboard from a mixture of cocoa pod peel powder and styrofoam ety jumiati; endang sagita ritonga; Abdul halim daulay
FISITEK: Jurnal Ilmu Fisika dan Teknologi Vol 5, No 1 (2021)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/fisitekfisitek.v5i1.9986

Abstract

AbstractAbstract. This study aims to determine the effect of optimal physical properties and microstructure on particleboard samples. The percentage variations of cocoa pod peel powder mixture, styrofoam with epoxy resin adhesive were sample A (69:0:30), sample B (68:2:30), sample C (67:3:30), and sample D (66:4:30). 6:30). The materials were compressed were a hot press and a conditioning time of 14 days. sThe most optimum particleboard sample was found in sample B with values of density, moisture content, and thickness expansion, respectively 0,80 g/cm2, 7,74%, and 9,32%, and met the standards of SNI 03-2105- 2006. The surface shape of the particle board morphology in sample B shows the composition of the material with the adhesive binding optimally so that there are very few empty spaces or cavities. Keywords: cocoa pod husk powder, styrofoam, particle board, epoxy resin.
ANALISIS UJI KIMIA KESADAHAN DAN BESI PADA AIR SUNGAI HULU BANGKO DENGAN MEDIA FILTRASI KARBON AKTIF KULIT KACANG TANAH Ety Jumiati; Abdul Halim Daulay; Putri Indah Sari
Komunikasi Fisika Indonesia Vol 19, No 3 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.3.141-145

Abstract

The filtering of river water has been carried out with the aim of knowing the edvantages of the river water upstream of Bangko before the filtration process is carried out, after the filtrations proces is caried out, and to determine the most optimum variation. In this study using the composition of activated carbon of peanut shells, silica sand, manganese, and zeolite with sample variations A (30% : 30% : 20% : 20%), B (35% : 25% : 20% : 20%), and C (40% : 20% : 20% : 20%). In this study, the chemical test parameters were: (hardness, and iron). The results of testing the river water before the filtration process has not met the PERMENKES RI No. 32 of 2017. Meanwhile, after the river water filtration process has met the clian waters standard based on the PERMENKES RI No. 32 of 2017. And the optimum variation is sample C with an activated carbon value of 40%.
Analisis Sifat Fisika dan Kimia terhadap Pembuatan Briket Arang Limbah Biji Salak dengan Variasi Perekat Tepung Tapioka dan Tepung Sagu Nurlaila Sari Harahap; Ety Jumiati
Jurnal Fisika Unand Vol 12, No 1 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (317.426 KB) | DOI: 10.25077/jfu.12.1.115-123.2023

Abstract

Telah dilakukan pembuatan briket arang dengan bahan dasar biji salak dengan variasi perekat tepung tapioka dan tepung sagu. Variasi komposisi biji salak dengan perekat tepung tapioka dan tepung sagu antara lain : Sampel A (65% : 30%), B (70% : 30%) dan C (75% : 25%) perbandingan perekat dengan air (1:3) serta waktu pengeringan  selama 7 hari. Parameter uji  meliputi : kadar abu, kadar zat terbang dan kadar karbon. Hasil uji diperoleh briket arang yang optimal yaitu pada  sampel A dengan perekat tepung sagu. Pada Sampel A, briket arang yang diperoleh menghasilkan nilai kadar abu 5,21%, kadar zat terbang 9,62% dan kadar karbon 78,53%. Sampel briket telah sesuai dengan SNI No.01-6235-2000 briket arang. Sehingga briket arang dapat digunakan dalam skala rumah tangga.The manufacture of charcoal briquettes with the essential ingredients of salak seeds has been carried out with variations of tapioca flour and sago flour adhesives. Variations in the composition of salak seeds with tapioca flour and sago flour adhesives include: Sample A (65%: 30%), sample B (70%: 30%), and sample C (75%: 25%) with a ratio of adhesive and water (1 :3) and the drying time is 7 days. Parameters of the tests carried out include: ash content, volatile matter content, and carbon content. The test data obtained showed that the optimal charcoal briquettes were in sample A with sago flour adhesive. In Sample A, the charcoal briquettes obtained produced an ash content of 5.21%, a volatile matter content of 9.62%, and a carbon content of 78.53%. The briquette samples were by SNI No. 01-6235-2000 regarding charcoal briquettes. So that charcoal briquettes can be used on a household scale. 
Co-Authors Abdul Halim Daulay Afifah Azmi Aiysah Hannum Pulungan Ananda Tira Septiana Sari asnitha aritonang Ayu Amalya Rahma Ayu Dwi Retno Bayu Anugrah KS Dika Prananda endang sagita ritonga Ervina Putri Wulandari Ismail Husein, Ismail Kiki Noviansyah Masthura, Masthura Meutia Nanda Miftahul Husna Miftahul Husnah Nanda Putri Afrilda Nazaruddin Nasution Nita Zahara Nasution Nujulia Subuharni Nur'aini Fadillah Nurlaila Sari Harahap Putri Indah Sari Ratni Sirait Riadina Siregar Ridwan Yusuf Lubis Ridwan Yusuf Lubis Ririn sagita Aruan Rizki Qorina Sandi Tri Febriani Siti Munawaroh Sunny Nafisah ufik eliati tumanggor