scholarly journals Identifikasi Salinitas Tanah Menggunakan Instrumen Induksi Elektromagentik EM38 di Kecamatan Baitussalam Kabupaten Aceh Besar

2021 ◽  
Vol 5 (4) ◽  
pp. 293-304
Author(s):  
Rini Ermiana* ◽  
Suhendrayatna Suhendrayatna ◽  
Sugianto Sugianto
Keyword(s):  
Soil Salinity ◽  
Coastal Area ◽  
Large Population ◽  
Conductivity Measurement ◽  
Sampling Technique ◽  
Salinity Level ◽  
Indian Ocean Tsunami ◽  
Electrical Conductivity Measurement ◽  
A Value ◽  
Maximum Conductivity

Salinity is the amount of salt contained or dissolved in water or soil. Salinity can cause the change of physical characteristics of soil, especially in coastal area, that affects human daily activities, including agriculture. Baitussalam District (Kecamatan Baitussalam) is one of the districts that was hit most devastatingly by the Indian Ocean Tsunami 2004 as well as has large population with potential agricultural prospect in Aceh Besar Region (Kabupaten Aceh Besar). This research aims to identify the soil salinity level in the Baitussalam District. The sampling technique uses descriptive methodology with scalable quantitative approach in the chosen sampling areas. 26 sampling spots have been chosen according to mathematical calculation. Quantitative method is used to analyze the result in this research. Furthermore, conductivity measurement is done through induction electromagnetic method, using Geonics EM38 and to identify the soil salinity level, analysis of soil texture is conducted in the laboratory. As the result, the electrical conductivity measurement shows varying values. The minimum conductivity value is 0,004 dS/m, taken at spot T 004 in Lam Ujong Village (Desa Lam Ujong). Whereas the maximum conductivity value reaches 10,31 dS/m, taken at spot T 003 in Labuy Village. The soil salinity in the 26 sampling spots in Baitussalam District demonstrates an average level, with a value of ECa 2-4 dS/m. The result of this research is expected to be a parameter to control and develop the activities, especially for agricultural activities, in the coastal area in Aceh Besar Region, and in Baitussalam district in particular.

Pengaruh Pembelajaran Daring Berbantuan Laboratorium Virtual Terhadap Minat dan Hasil Belajar Kognitif Fisika

2020 ◽  
Vol 3 (2) ◽  
pp. 351-359
Author(s):  
Egidius Dewa ◽  
Maria Ursula Jawa Mukin ◽  
Oktavina Pandango
Keyword(s):  
Online Learning ◽  
Learning Outcomes ◽  
Random Sampling ◽  
Cognitive Learning ◽  
Sampling Technique ◽  
Simple Random Sampling ◽  
Virtual Labs ◽  
A Value ◽  
Virtual Lab ◽  
Learning Interest

Abstrak: Tulisan ini bertujuan untuk mengetahui pengaruh pembelajaran daring berbantuan laboratorium virtual terhadap minat belajar fisika peserta didik dan mengetahui pengaruh pembelajaran daring berbantuan laboratorium virtual terhadap hasil belajar kognitif fisika peserta didik. Jenis penelitian ini adalah quasi eksperimen dengan desain eksperimen one group pretest posttest. Sampel penelitian ini adalah peserta didik kelas X MIPA 1 yang berjumlah 33 orang yang ditentukan dengan teknik simple random sampling. Instrumen yang digunakan dalam penelitian ini adalah tes hasil belajar kognitif dan angket minat belajar peserta didik. Hasil analisis data dapat disimpulkan bahwa ada pengaruh pembelajaran daring berbantuan laboratorium virtual terhadap minat belajar peserta didik dengan nilai sig (2-tailed) lebih kecil dari 0,05 (0,0063 < 0,05) dan ada pengaruh pembelajaran daring berbantuan laboratorium virtual terhadap hasil belajar kognitif peserta didik dengan nilai sig (2-tailed)  lebih kecil dari 0,05 (0,000 < 0,05) Abstract: This article aims to determine the influence of online learning with virtual labs on the learning interest of students ' physics and to know the influence of online learning with virtual labs on cognitive learning outcomes of student physics. This type of research is a quasi experiment with the experimental design of one group Pretests posttest. This research sample is a student of class X MIPA 1 which amounted 33 people determined with simple random sampling technique. The instruments used in this study are cognitive learning results test and Angket learning interest learners. Data analysis results can be concluded that there is a virtual lab-assisted online learning influence to the learning interest of learners with a value of sig (2-tailed) smaller than 0.05 (0.0063 < 0.05) and there is a virtual lab-assisted online learning influence to the outcome of the students ' cognitive learning with a sig (2-tailed) value smaller than 0.05 (0.000 < 0.05).

scholarly journals Low Surface Roughness Graphene Oxide Film Reduced with Aluminum Film Deposited by Magnetron Sputtering

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1428
Author(s):  
Xiaowei Fan ◽  
Xuguo Huai ◽  
Jie Wang ◽  
Li-Chao Jing ◽  
Tao Wang ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Electron Transfer ◽  
Graphene Oxide ◽  
Magnetron Sputtering ◽  
Chemical Reduction ◽  
Graphene Film ◽  
Conductivity Measurement ◽  
Electrical Conductivity Measurement ◽  
Vis Spectroscopy ◽  
Hcl Solution

Graphene film has wide applications in optoelectronic and photovoltaic devices. A novel and facile method was reported for the reduction of graphene oxide (GO) film by electron transfer and nascent hydrogen produced between aluminum (Al) film deposited by magnetron sputtering and hydrochloric acid (HCl) solution for only 5 min, significantly shorter than by other chemical reduction methods. The thickness of Al film was controlled utilizing a metal detection sensor. The effect of the thickness of Al film and the concentration of HCl solution during the reduction was explored. The optimal thickness of Al film was obtained by UV-Vis spectroscopy and electrical conductivity measurement of reduced GO film. Atomic force microscope images could show the continuous film clearly, which resulted from the overlap of GO flakes, the film had a relatively flat surface morphology, and the surface roughness reduced from 7.68 to 3.13 nm after the Al reduction. The film sheet resistance can be obviously reduced, and it reached 9.38 kΩ/sq with a high transmittance of 80% (at 550 nm). The mechanism of the GO film reduction by electron transfer and nascent hydrogen during the procedure was also proposed and analyzed.

scholarly journals Electrical Conductivity Measurement on Metallic Materials With a Cylindrical Resonator

2021 ◽  
pp. 1-9
Author(s):  
Yunfeng Dong ◽  
Morten Stendahl Jellesen ◽  
Rune Juul Christiansen ◽  
Jesper Hovelskov ◽  
Jorgen Sundgren ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Conductivity Measurement ◽  
Metallic Materials ◽  
Electrical Conductivity Measurement ◽  
Cylindrical Resonator

Electrical Properties of Y0.06Sr0.94Ti0.6Fe0.4O3-δ-YSZ Composites as Electrode Materials

2016 ◽  
Vol 697 ◽  
pp. 327-330 ◽  
Author(s):  
Ke Shan ◽  
Xing Min Guo ◽  
Feng Rui Zhai ◽  
Zhong Zhou Yi
Keyword(s):  
Electrical Conductivity ◽  
Electrode Materials ◽  
Electronic Conductivity ◽  
Ionic Conductivities ◽  
Conductivity Measurement ◽  
Transference Numbers ◽  
Secondary Phases ◽  
Electrical Conductivity Measurement ◽  
Total Electrical Conductivity ◽  
Phase Compatibility

Y0.06Sr0.94Ti0.6Fe0.4O3-δ-YSZ composites were prepared by mixing Y, Fe co-doped SrTiO3 (Y0.06Sr0.94Ti0.6Fe0.4O3-δ known as YSTF) and 8 mol% Y2O3 stabilized ZrO2 (YSZ) in different weight fractions. The phase stability, phase compatibility, microstructure and mixed ionic-electronic conductivity of composites were investigated. Phase analysis by XRD showed no clearly detectable secondary phases. The electrical conductivity measurement on the YSTF-YSZ composites showed a drastic decrease in total electrical and ionic conductivities when more than 10 wt% of YSZ was used in the composites. The total electrical conductivity was 0.102 S/cm for Y0.06Sr0.94Ti0.6Fe0.4O3-δ and 0.043 S/cm for YSTF-20YSZ at 700 oC, respectively. The value at 700 oC is approximately 2.4 times higher than that of YSTF-20YSZ. The ionic conductivity of Y0.06Sr0.94Ti0.8Fe0.2O3-δ varies from 0.015S/cm at 700 oC to 0.02 S/cm at 800 oC, respectively. The value at 800°C is approximately 12.5 times higher than YSTF-20YSZ. The ion transference numbers of YSTF-YSZ composites vary from 0.14 to 0.28 at 800 °C.

Myanmar Coastal Area Field Survey after the December 2004 Indian Ocean Tsunami

2006 ◽  
Vol 22 (3_suppl) ◽  
pp. 285-294 ◽  
Author(s):  
Tint Lwin Swe ◽  
Kenji Satake ◽  
Than Tin Aung ◽  
Yuki Sawai ◽  
Yukinobu Okamura ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Real Time ◽  
West Coast ◽  
Coastal Area ◽  
Field Survey ◽  
Indian Ocean Tsunami ◽  
Sumatra Earthquake ◽  
The West ◽  
Tide Level ◽  
The Indian Ocean

A post-tsunami survey was conducted along the Myanmar coast two months after the 2004 Great Sumatra earthquake ( Mw=9.0) that occurred off the west coast of Sumatra and generated a devastating tsunami around the Indian Ocean. Visual observations, measurements, and a survey of local people's experiences with the tsunami indicated some reasons why less damage and fewer casualties occurred in Myanmar than in other countries around the Indian Ocean. The tide level at the measured sites was calibrated with reference to a real-time tsunami datum, and the tsunami tide level range was 2–3 m for 22 localities in Myanmar. The tsunami arrived three to four hours after the earthquake.

scholarly journals Noninvasive electrical conductivity measurement by MRI: a test of its validity and the electrical conductivity characteristics of glioma

2017 ◽  
Vol 28 (1) ◽  
pp. 348-355 ◽  
Author(s):  
Khin Khin Tha ◽  
Ulrich Katscher ◽  
Shigeru Yamaguchi ◽  
Christian Stehning ◽  
Shunsuke Terasaka ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Conductivity Measurement ◽  
Electrical Conductivity Measurement

Electrical conductivity measurement on DKDP Crystals with different deuterated degrees

2012 ◽  
Vol 109 (1) ◽  
pp. 159-162 ◽  
Author(s):  
Baoan Liu ◽  
Xin Yin ◽  
Minglei Zhao ◽  
Qinghua Zhang ◽  
Mingxia Xu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Conductivity Measurement ◽  
Electrical Conductivity Measurement

Electrical conductivity measurement in studying physicochemical charges in conservation tubes

1987 ◽  
Vol 22 (6) ◽  
pp. 761-764 ◽  
Author(s):  
S. S. Nabatov ◽  
A. N. Dremin ◽  
S. O. Shubitidze ◽  
V. V. Yakushev
Keyword(s):  
Electrical Conductivity ◽  
Conductivity Measurement ◽  
Electrical Conductivity Measurement

scholarly journals ANALISIS KUALITAS PELAYANAN DENGAN MENGGUNAKAN METODE FUZZY-SERVQUAL PADA KANTOR POS PUSAT KOTA PADANG

Jurnal Ecogen ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 18
Author(s):  
Widia Afriyuni ◽  
Rahmiati Rahmiati ◽  
Muthia Roza Linda
Keyword(s):  
Customer Satisfaction ◽  
Service Quality ◽  
Consumer Satisfaction ◽  
Sampling Technique ◽  
Total Sample ◽  
Primary Data ◽  
Post Office ◽  
City Center ◽  
A Value ◽  
Analysis Technique

This study aims to analyze: (1) The level of customer satisfaction with the quality provided by the Padang City Center Post Office (2) Service attributes that need to be improved in service quality at the Padang City Center Post Office so as to improve customer satisfaction (3) Quality dimensions services that have the greatest influence on customer satisfaction at the Padang City Center Post Office. The population of this research is the Post Office customers with unknown number of respondents. The sampling technique of this study was accidental sampling technique with a total sample of 100 people. The data used is primary data. The data analysis technique uses the fuzzy-servqual method using Microsoft Excel software. The results showed that: (1) The level of consumer satisfaction is low because the overall servqual (gap) value is negative, namely -0.75 (2) There are 17 attributes that need to be improved from the 22 attributes that are tested to improve the quality of service at the Post Office Padang City Center (3) Dimensions of service quality with the biggest gap is the dimension of responsiveness with a value of -1.32.Keywords: Service Quality, fuzzy-servqual, customer satisfaction

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