Journal of Natural Sciences and Mathematics Research最新文献_第8页

Study of Zno:Ga Thin Film Structure With Variation of Plasma Power Using the DC Magnetron Sputtering Method 用直流磁控溅射法研究等离子体功率变化下Zno:Ga薄膜结构

Journal of Natural Sciences and Mathematics Research Pub Date : 2018-12-31 DOI: 10.21580/jnsmr.2018.4.2.11017

P. Marwoto, B. Astuti, S. sugianto

引用次数: 0

Characterization of Magnetic Properties of the Coastal Sand Deposits in South Beach of Manokwari, West Papua 西巴布亚Manokwari南海滩海岸砂体磁性特征

Journal of Natural Sciences and Mathematics Research Pub Date : 2018-12-31 DOI: 10.21580/jnsmr.2018.4.2.11016

Sangaji Hasmi Maharani Ipa, Siti Hadjar Kubangun, S. Bijaksana, D. Dahrin, Innaa Uswatun Hasanah

{"title":"Characterization of Magnetic Properties of the Coastal Sand Deposits in South Beach of Manokwari, West Papua","authors":"Sangaji Hasmi Maharani Ipa, Siti Hadjar Kubangun, S. Bijaksana, D. Dahrin, Innaa Uswatun Hasanah","doi":"10.21580/jnsmr.2018.4.2.11016","DOIUrl":"https://doi.org/10.21580/jnsmr.2018.4.2.11016","url":null,"abstract":"Coastal sand deposits containing iron particles (magnetic) can be regarded as iron sand and it generally has color from gray to shiny black yet while it is mixed with other minerals, the mineral will have a certain color combination. Coastal sand in the South of Manokwari Regency, West Papua especially in Wosi Beach, Arfai Beach, and Maruni Beach has a different color of the grain according to the source rocks and the sedimentation process. To characterize the magnetic properties of the three coastal sand deposits, several experimentations were done through measurements of the density, magnetic degree, magnetic susceptibility, and also SEM (Scanning Electron Microscopy) and EDS (Energy Dispersive X–Ray Spectroscopy) tests. The coastal sand deposition has a density ranging from 2.50–5.00 g cm-3 with the magnetic degree between 0.28–36.29 % and its magnetic susceptibility ranged 80.9×10-8 – 7447.7×10-8 m3 kg-1. The coastal sand from Arfai Beach has a magnetic susceptibility between the coastal sand from Wosi and Maruni Beach with the highest value reaching 5135.4 × 10-8 m3 kg-1. This is also supported by SEM and EDS data. The percentage of iron element mass (Fe) of the identified magnetic grain distribution in Wosi Beach sand is 6.71–33.90%, Arfai Beach sand is 11.35 – 38.45% and Maruni beach sand is 15.84–44.41%. ©2018 JNSMR UIN Walisongo. All rights reserved.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117268866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Zno/Ag Thin Layer Microstructure with The Effect of Annealing Temperature 退火温度对Zno/Ag薄层微观结构的影响

Journal of Natural Sciences and Mathematics Research Pub Date : 2018-12-31 DOI: 10.21580/jnsmr.2018.4.2.11018

Sheilla Rully Anggita, Habik Setiawan, H. Sutanto

{"title":"Zno/Ag Thin Layer Microstructure with The Effect of Annealing Temperature","authors":"Sheilla Rully Anggita, Habik Setiawan, H. Sutanto","doi":"10.21580/jnsmr.2018.4.2.11018","DOIUrl":"https://doi.org/10.21580/jnsmr.2018.4.2.11018","url":null,"abstract":"The formation of ZnO/Ag morphology in the form of ganglia structures that are overgrown with grains in previous studies has been shown to degrade the presence of E. coli bacteria. In this research, the variations of annealing temperature were studied, namely 250 ℃, 300 ℃, 350 ℃, and 400 ep when the 4% ZnO/Ag deposition had an effect on crystallinity and morphology. The crystallinity of ZnO/Ag was obtained by using the X-Ray Diffraction (XRD) test and the surface morphology of the ZnO/Ag layer using the Scanning Electron Microscope (SEM) test. The results of the research with the XRD test showed that the crystal structure of ZnO/Ag 4% was hexagonal wurtzite at annealing temperature of 250 ℃ and 300 ℃, while the amorphous structure was obtained in ZnO/Ag with annealing temperature of 350 ℃ and 400 ℃. The largest average crystallite size was owned by ZnO/Ag at annealing temperature of 300 ℃ which was 83.408 µm. The morphology obtained from a thin layer of ZnO/Ag 4% with annealing temperature of 250 ℃ and 300 ℃ is in the form of grains composed of ganglia structures. The ZnO/Ag layer with annealing temperature of 300 ℃ had the largest roughness level of 0.422 µm and the largest surface area of 197.233 µm. Meanwhile, the morphology of ZnO / Ag at annealing temperature of 350 ℃ and 400 ℃ did not form a ganglia structure so that the roughness level was low and the surface area was small. The larger the crystallite size, the higher the roughness level, and the larger the resulting surface area. ©2018 JNSMR UIN Walisongo. All rights reserved. ","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120987938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determining Hair Thickness using the Light Diffraction Method: Verification of the Seven Times Sliced Hair Phenomenon 用光衍射法测定头发厚度:对头发七次切片现象的验证

Journal of Natural Sciences and Mathematics Research Pub Date : 2018-12-31 DOI: 10.21580/jnsmr.2018.4.2.11037

E. Ellianawati, Muhammad An’im Arravi, Fitria Wulandari, Rofita Istiqomah

{"title":"Determining Hair Thickness using the Light Diffraction Method: Verification of the Seven Times Sliced Hair Phenomenon","authors":"E. Ellianawati, Muhammad An’im Arravi, Fitria Wulandari, Rofita Istiqomah","doi":"10.21580/jnsmr.2018.4.2.11037","DOIUrl":"https://doi.org/10.21580/jnsmr.2018.4.2.11037","url":null,"abstract":"Light or optical spectrum is a part of electromagnetic radiation and has several electromagnetic wave properties; one of them is undergoing diffraction. Diffraction or light bending occurred when a light went through a narrow gap. By utilizing that principle, it was proven that a piece of hair could be assumed as a single gap, so the thickness of a piece of hair could be determined, which lead to the explanation of the phenomenon of a piece of hair sliced seven times. As a tool, the used sim cardholder is used to put hair using adhesive tape. Then the sim card is placed between the light source and the screen. The light source used is a red laser with a wavelength of 660 nm. Hair is placed in two positions: horizontally and vertically. Hair that is laid horizontally will create a vertical light-dark pattern, and hair that is placed vertically will form a horizontal light-dark pattern. The dark and light patterns on the screen are measured using a ruler according to the order of each pattern that is formed. The hair thickness measurement results using a red laser with a wavelength of 660 nm obtained hair thickness of d = (0.01146 ± 0.00019) cm for hair that is placed horizontally and d = (0.01151 ± 0.00011) cm for vertically placed hair. This data has more or less proven that there is potential to \"split\" the hair into sections, but it has not been proven that the hair can be split into seven parts, so there is still a chance to prove it.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125123156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Zeolite-Based Silica Synthesis With Calcination Temperature Variations 100oC, 150oC and 200oC 煅烧温度100oC, 150oC和200oC下沸石基二氧化硅的合成

Journal of Natural Sciences and Mathematics Research Pub Date : 2018-12-31 DOI: 10.21580/jnsmr.2018.4.2.11019

Helisa Duwi Maesari, Misfalakhul Hidayah

引用次数: 0

Synthesis of Low-Cost Adsorbent Based on Fly Ash for Heavy Metal Reduction of Cu and Cr In Textile Industrial Liquid Waste 纺织工业废液中重金属还原铜、铬的低成本粉煤灰吸附剂的合成

Journal of Natural Sciences and Mathematics Research Pub Date : 2018-12-31 DOI: 10.21580/jnsmr.2018.4.2.11020

M. Mulyatun

{"title":"Synthesis of Low-Cost Adsorbent Based on Fly Ash for Heavy Metal Reduction of Cu and Cr In Textile Industrial Liquid Waste","authors":"M. Mulyatun","doi":"10.21580/jnsmr.2018.4.2.11020","DOIUrl":"https://doi.org/10.21580/jnsmr.2018.4.2.11020","url":null,"abstract":"Heavy metal copper (Cu (II)), Chromium (Cr (IV) is a heavy metal that dominates textile industrial wastewater. Too large concentrations of Cu (II) in water can cause poisoning which has side effects of liver damage and gastrointentinal disorders. Cr metal in the body will cause interference with DNA synthesis and increase mutagen changes that can cause tumors. The use of fly ash as a Low Cost Adsorbent is an alternative. The research method used is a physical activation process with carbonization at high temperatures (300˚C, 400˚C and 500˚C) in the furnace to be continued with chemical activation using concentrated acids (H2SO4 and CH3COOH) or base (KOH) in fly ash. Morphological analysis and the synthesized adsorbent function groups were performed using Scanning Electron Microscopes (SEM) and FTIR. Based on the adsorption capacity test, the ability of fly ash to adsorb Cu metal waste was 0.9962 mg/g and for Cr metal was 0.4760 mg/g. The temperature increase on the physical activation of fly ash (300 0C, 4000C, 5000C) causes an increase in the adsorption capacity of the synthesized fly ash. The best adsorbent for Cu metal is A5K with an adsorption capacity of 0.9994 mg/g under optimal conditions. The best adsorbent for Cr metal is A5S with an adsorption capacity of 0.9325 mg/g under optimal conditions. ©2018 JNSMR UIN Walisongo. All rights reserved.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115272539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genetic Algorithm for Solving 3 Dimensional Time Table Problem Based on Traveling Salesman Problem (TSP) Method 基于旅行商问题(TSP)方法求解三维时间表问题的遗传算法

Journal of Natural Sciences and Mathematics Research Pub Date : 2018-06-30 DOI: 10.21580/jnsmr.2018.4.1.10958

Dwi Fatul Oktafiani, Muhammad Ardhi Khalif

{"title":"Genetic Algorithm for Solving 3 Dimensional Time Table Problem Based on Traveling Salesman Problem (TSP) Method","authors":"Dwi Fatul Oktafiani, Muhammad Ardhi Khalif","doi":"10.21580/jnsmr.2018.4.1.10958","DOIUrl":"https://doi.org/10.21580/jnsmr.2018.4.1.10958","url":null,"abstract":"Scheduling problems are problems that are often faced by educational institutions, especially at the university level. This is because there are several obstacles in the preparation of the schedule, namely first, there should be no duplication of space, day, and hour. Second, there should be no duplication of lecturers on the same day and time, even though in different rooms and in different subjects. Third, there should be no duplication of group classes (study groups). Therefore, the purpose of this study is to obtain a genetic algorithm as a solution in overcoming the three constraints of preparing the schedule by using the Traveling Salesman Problem (TSP) method in the crossover process. To make it easier to organize the schedule, a 3-dimensional matrix is used with the x-axis representing (space, day, hour), the y-axis representing (courses, lecturers, credits) and the z-axis representing (classes). This study simulates the scheduling of 20 courses, 50 credits, 8 lecturers, and 19 classes. Chromosomes in this study are permutations of integers 1-20. Each gene in a chromosome represents a course package. From the scheduling results, the fitness function is 0.96 for 48 schedule slots (2 rooms x 3 days x 8 hours). For schedule slots greater than 50 (3 rooms x 3 days x 8 hours, 2 rooms x 4 days x 8 hours, and 2 rooms x 3 days x 9 hours), this algorithm is successful in getting fitness function 1. ©2018 JNSMR UIN Walisongo. All rights reserved.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130776608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Behavior Study of Periophthalmus variabilis and Boleophthalmus boddarti 眼周变异性和眼圆的行为学研究

Journal of Natural Sciences and Mathematics Research Pub Date : 2018-06-30 DOI: 10.21580/jnsmr.2018.4.1.10959

Saifullah Hidayat

{"title":"Behavior Study of Periophthalmus variabilis and Boleophthalmus boddarti","authors":"Saifullah Hidayat","doi":"10.21580/jnsmr.2018.4.1.10959","DOIUrl":"https://doi.org/10.21580/jnsmr.2018.4.1.10959","url":null,"abstract":"This Gelodok fish (Mudskipper) which is called as amphibious fish have unique activity that can live in terrestrial and aquatic area. This study aims to study the daily activities of fish population 2 types of Periophthalmus variabilis and Boleophthalmus boddarti by using the scan sampling method and ad libitum. This research was conducted in September 2017 at the mouth of the river Tluwuk, Pati, Central Java. Observations were made for 150 minutes with a time interval of 5 minutes. The results showed that fish activity P. variabilis (v) was different from B. Boddarti (b). P. varibilis spends more time on land (90%) than in water (10%) whereas B. Boddarti activity is more in water (60%) than in land (40%). Observed activities are walking (a = 24,08 %., b = 11,73% ), jumping (a = 4.01%, b = 0.65%), feeding / catching prey (a = 5,01%, b = 7.82%), swimming (a = 2.01%, b = 11.72%), moving dorsal fins (a = 4.01%, b = 3.26%), moving caudal fins (a = 2 , A = 2.67%, b = 7.82%), escape predators (a = 3.34%, b = 6.51%), head movements (a = 4.01%, b = 15.63%), entering holes/nesting (a = 0.67%, b = 1.95%), and inactive (a = 40.13%, b = 19 , 54%). ","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121670832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sound Absorbent And Damping Rate of The Natural Composites Design 天然复合材料吸声率和阻尼率的设计

Journal of Natural Sciences and Mathematics Research Pub Date : 2018-06-30 DOI: 10.21580/jnsmr.2018.4.1.10962

Sekarani Andari Kunthi, Baiq Siti Hawa, Firda Auliya

引用次数: 0

Implementation of Micro Usb Charger TP4056 and Battery Indicator LED in Portable Solar Charge 微型Usb充电器TP4056和电池指示灯LED在便携式太阳能充电器中的实现

Journal of Natural Sciences and Mathematics Research Pub Date : 2018-06-30 DOI: 10.21580/jnsmr.2018.4.1.10956

Donny Auliya Arrohman, Nafis Ainun Fikriyyah

{"title":"Implementation of Micro Usb Charger TP4056 and Battery Indicator LED in Portable Solar Charge","authors":"Donny Auliya Arrohman, Nafis Ainun Fikriyyah","doi":"10.21580/jnsmr.2018.4.1.10956","DOIUrl":"https://doi.org/10.21580/jnsmr.2018.4.1.10956","url":null,"abstract":"Mobile is a communication tool that is needed in today's era of globalization. The source of the cellphone's power is the battery which if the power goes out and the battery runs out, it is necessary to charge the battery to turn it back on. In this study, a portable solar panel-based charger was designed as an alternative to charging batteries without using a power source. The method used is research and development where this research produces a product. The results obtained indicate that the highest intensity value at 11:00 WIB is 5986 cd, the highest current value before entering the current stabilizer and voltage amplifier circuit is 0.004 A and the highest voltage is 5 V, for the current value after entering the current stabilizer and amplifier circuit. the overall voltage value is the same, namely 0.002A and 4V. This simple portable solar cell phone charger is able to supply power to the Nokia 215 Dual SIM for 5 hours and 30 minutes. There is an LED indicator on the portable solar charger where during the charging process it will be red, then after it is full it will be blue, and when it is running out it will be orange. ©2018 JNSMR UIN Walisongo. All rights reserved.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116341385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1