scholarly journals Pembuatan KIT Sederhana Rangkaian Listrik Dinamis Sebagai Produk Akhir Pada Mata Kuliah Praktikum IPA

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Dedi Riyan Rizaldi ◽  
Kasmah Harwati ◽  
Ziadatul Fatimah ◽  
Muh. Makhrus
Keyword(s):  
Secondary Level ◽  
Electrical Current ◽  
Electrical Circuit ◽  
Parallel Circuits ◽  
Three Stages ◽  
Learning Dynamic ◽  
And Storage

Learning physics is of course a part of science and should be able to facilitate students to do lab sessions or experiments to prove the concepts learned. One of them relates to dynamic electricity at the secondary level. However, there are still many schools that do not have practical tools that can assist students in learning dynamic electricity equipment. Therefore, the writing of this article is to explain the process of making a simple KIT dynamic electrical circuit as the final product in the science practicum course. The process to create this KIT consists of three stages, namely preparation, implementation and testing. Based on the work carried out, this appears 1). The process of making a dynamic electrical circuit KIT is divided into two parts, namely making tool sets and storage boxes, and 2). Practical activities that can use this electrical circuit KIT include measuring the size of GGL on the battery, measuring the voltage and electrical current, as well as series and parallel circuits

Fiber optic time break

Geophysics ◽  
1996 ◽  
Vol 61 (1) ◽  
pp. 294-298 ◽  
Author(s):  
Anton W. Kepic ◽  
R. D. Russell
Keyword(s):  
Time Lag ◽  
Geophysical Methods ◽  
Personal Communication ◽  
Electrical Current ◽  
Explosive Material ◽  
Actual Performance ◽  
The Cost ◽  
Explosive Devices ◽  
And Storage ◽  
Better Than

Geophysical methods that use explosive seismic sources need to produce an accurate time break signal at the time of the blast. This is generally achieved with a seismic detonator, a special variety of electrical detonator (or cap) that is designed to have minimal latency between the injection of electrical current into the detonator and initiation of the explosion, as well as having a slightly higher base charge and better water resistance. A time‐break signal is obtained by either electronically controlling or monitoring the blast current. Seismic detonators are guaranteed to have better than a millisecond latency if sufficient current is injected into the leads; the necessary current is usually 5 to 10 amps. A millisecond tolerance is acceptable for most seismic work but may not be sufficient for shallow studies or for crosswell tomography. However, in fairness to the seismic detonator, the actual performance is generally better: Burrows (1936) and, independently, Rolland and White (1937) reported a time lag of less than 0.3 ms with a deviation of 0.1 ms. These values have changed little since the 1940s. The MK 2 from C.I.L. Inc. (a division of I.C.I.) has an average lag of 0.3–0.4 ms (personal communication with I.C.I. explosives). Major improvements in electric detonator design have been in the areas of safety and durability. A much greater disadvantage for explosive sources are the strict regulations on the transport and storage of explosive devices (Tour, 1992). The cost of complying with these regulations may prohibit the use of explosives in small surveys or in remote areas. An example is the transport of explosives by aircraft: the only passengers allowed on board are those neccesary for completing the flight and for transporting the explosives. Chartering an aircraft to transport a small amount of explosive material is too costly for many geotechnical and mining geophysics surveys.

scholarly journals Comparison of I-V Curves Between the Experiment of Corona Discharge on Gradient Line-To-Plane (GL-P) Configuration and The Mathematical Approach

2021 ◽  
Vol 3 (2) ◽  
pp. 155-164
Author(s):  
Susilo Hadi ◽  
Asep Yoyo Wardaya ◽  
Zaenul Muhlisin ◽  
Jatmiko Endro Suseno ◽  
Pandji Triadyaksa ◽  
...  
Keyword(s):  
Corona Discharge ◽  
Characteristic Curve ◽  
Mathematical Formulation ◽  
Electrical Current ◽  
Electrical Circuit ◽  
Multiplication Factor ◽  
Mathematical Study ◽  
Active Electrode ◽  
Electrode Shape ◽  
Gradient Line

Research has been conducted on the comparison of the I-V characteristic curve between mathematical study and experiment of the generation of negative DC corona discharge in the Gradient Line-to-Plane (GL-P) electrode configuration. The reason for this research is to calculate the suitability of the corona discharge electrical current between the mathematical and experimental study. The active electrode used has length 2 cm and height 4 cm. This research is conducted with variations in the sharpness angle of the active electrode (θ) 300, 450, and 600 and variations in the distance between the electrodes () 2 cm, 3 cm, and 4 cm. The mathematical formulation of the value of the corona discharge electrical current in the configuration of the GL-P electrode is obtained by using the geometric concept approach, which is the formulation of the capacitance value of the ordinary electrical circuit, with the addition of the multiplication factor value k in the sharp area of the active electrode, because in that area the greatest plasma flow distance is obtained. The value of the multiplication factor  is obtained by fitting the curve between mathematical study and experiments. The I-V curve between the mathematical study and the corona discharge generation experiment has a high degree of similarity with the smallest percentage contacting point of 37.50%.The value of the multiplication factor  is influenced by the sharpness angle of the active electrode shape and the distance between the electrodes.

scholarly journals Forensic Engineering Analysis Of Electric Shock From Ground Fault Circuit Interrupter (GFCI)

2003 ◽  
Vol 20 (2) ◽  
Author(s):  
Richard D. Brugger
Keyword(s):  
Electric Shock ◽  
Electrical Current ◽  
Electrical Circuit ◽  
Engineering Analysis ◽  
Ground Fault ◽  
Ground Current ◽  
Forensic Engineering ◽  
Current Value ◽  
The Difference ◽  
Electrical Wiring

Many Electrical Wiring Systems Include Ground Fault Circuit Interrupters (Gfci) As Protective Elements. The Application Is For Avoidance Of Electric Shock Injuries To A Person In The Event That Their Body Becomes Part Of An Electrical Circuit Path From A Live Wire And Ground. The Theory Behind The Device Is That If There Is A Difference In Electrical Current Flowing Through The Live (120 Volt Ac) Wire And The Neutral Wire, Then The Difference Current Is Flowing To Ground And Is Potentially Hazardous To A Person. Functionally, The Gfci Should Automatically Open The Electrical Circuit Above A Certain Ground Current Value. This Paper Explores How The Circuit May Fail To Provide The Protection For Which It Is Intended, And Result In An Electric Shock.

scholarly journals Evaluation of viability of probiotic bacteria in mango (Mangifera indica L. Cv. “Tommy Atkins”) beverage

DYNA ◽  
2018 ◽  
Vol 85 (207) ◽  
pp. 84-92 ◽  
Author(s):  
Elizabeth Cristina Acevedo-Martínez ◽  
Carolina Gutiérrez Cortés ◽  
Maribel García Mahecha ◽  
Consuelo Díaz Moreno
Keyword(s):  
Storage Temperature ◽  
Mangifera Indica ◽  
Titratable Acidity ◽  
Probiotic Bacteria ◽  
Functional Beverages ◽  
Probiotic Strains ◽  
Three Stages ◽  
Technological Challenge ◽  
And Storage ◽  
Selection Of

The interest about probiotic bacteria supplementation in fruit beverages has been increased recently in order to develop functional beverages without lactose. That is a technological challenge since pH and storage temperature can affect their viability. The aim of this study was to evaluate the viability of three commercial probiotic strains (L. paracasei, L. casei and L. rhamnosus) in mango beverage stored at 4°C. This research was developed in three stages: the assessment of the acid strain tolerance, the selection of a prebiotic as cellular protectant against environmental stress, the evaluation of physiochemical and sensory stability during storage. L. casei was chosen as the most stable strain with FOS at 5% as a prebiotic substance that stimulated its growth. At the final stage, it was found that L. casei produced significant changes in pH and titratable acidity in mango beverages after one week at 4°C, which was also detected by consumers with good sensory acceptance

scholarly journals Seismic Data Compression Using 2D Lifting-Wavelet Algorithms

2015 ◽  
Vol 11 (21) ◽  
pp. 221-238 ◽  
Author(s):  
Carlos Fajardo ◽  
Oscar Mauricio Reyes ◽  
Ana Ramirez
Keyword(s):  
Wavelet Transform ◽  
Data Compression ◽  
Seismic Data ◽  
Data Sets ◽  
Coding Scheme ◽  
Filter Type ◽  
Three Stages ◽  
Seismic Data Compression ◽  
And Storage ◽  
Transforma Tion

Different seismic data compression algorithms have been developed in or-der to make the storage more efficient, and to reduce both the transmission time and cost. In general, those algorithms have three stages: transforma-tion, quantization and coding. The Wavelet transform is highly used tocompress seismic data, due to the capabilities of the Wavelets on representing geophysical events in seismic data. We selected the lifting scheme to implement the Wavelet transform because it reduces both computational and storage resources. This work aims to determine how the transforma-tion and the coding stages affect the data compression ratio.Several 2Dlifting-based algorithms were implemented to compress three different seis-mic data sets. Experimental results obtained for different filter type, filterlength, number of decomposition levels and coding scheme, are presented in this work.

scholarly journals Improved Current Doubler Rectifier

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2485 ◽  
Author(s):  
Mihail Antchev
Keyword(s):  
Electrical Current ◽  
Electrical Circuit ◽  
Circuit Diagram

It is widely accepted to examine and explain the functioning of the standard “Current Doubler Rectifier” as strictly symmetrical according to the electrical current through the two inductances. The present work challenges this consideration and proposes a new version of the electrical circuit diagram where the current symmetry is improved. The proposed circuit is called the “Improved Current Doubler Rectifier”.

scholarly journals Learning Ohm's Law through Electric Puzzle Media

2020 ◽  
Vol 6 (2) ◽  
pp. 217-226
Author(s):  
Adam Malik ◽  
Muhamad Dudi Asyidik ◽  
Kusmi Heni Nursamsika ◽  
Rifadiyah Nurul Khotimah ◽  
Rismaya Fitriyani
Keyword(s):  
Quantitative Methods ◽  
Electrical Circuit ◽  
Laboratory Equipment ◽  
Ohm’S Law ◽  
Parallel Circuits ◽  
In Series ◽  
Parallel Circuit ◽  
Ohm's Law ◽  
Circuit Components ◽  
The Relationship

Electrical circuit components or electronic circuits can be connected with series and parallel circuits. The arrangement of the circuit can affect the desired lamp characteristics. This study aims to measure the magnitude of resistance in an electrical circuit, analyze the flame of a series and parallel resistance, explore the relationship between voltage (V) with current (I) in series and parallel circuits. The method research used quantitative methods based on the problem-solving laboratory. The laboratory equipment used consists of a battery, incandescent lamps, resistors, stacking and zinc puzzles, multimeters, jumper cables. The laboratory equipment assembled and measured the intensity of the light produced using the physics toolbox application on a handphone. The data has obtained, then presented in a table and calculated using a formula, and analyzed the uncertainty in its measurement. The result showed the intensity of light in a series of different magnitude, the power of the light was more significant in lamp one, and in lamp two, the power was smaller. The intensity of the light in the parallel circuit was the same magnitude. Still, the value of the light intensity in the parallel circuit was smaller than the intensity in the lamps arranged in series. The relationship between voltage (V) and current (I) in both series and parallel circuits was comparable and directly proportional. Thus, the developed series of electric puzzles can adequately explain Ohm’s law. Ohm’s law learning with electric puzzles can be used in school and learned by students quickly.

Rehabilitation of Concrete Beam by Using Martensitic Shape Memory Alloy Strands

2011 ◽  
Vol 243-249 ◽  
pp. 5527-5530 ◽  
Author(s):  
Di Cui ◽  
Guan Ping
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Crack Width ◽  
Concrete Beam ◽  
Single Point ◽  
Electrical Current ◽  
Reinforced Concrete Structures ◽  
Ordinary Concrete ◽  
Steel Bars ◽  
Three Stages

The rehabilitation properties of intelligent concrete beam reinforced with shape memory alloys (SMA) is investigated. In this study, SMA strands, made of 7 single wires, are used to replace the steel bars in ordinary concrete beam. The test of single point loading at the mid-span is conducted on the beam. The experiment has three stages including loading, unloading and heating the SMA strands. During heating the SMA strands by electrical current, the crack width can be reduced by taking the advantage of the shape memory effect of SMA strands. The results illustrate that SMA is a candidate material for rehabilitation of reinforced concrete structures.

scholarly journals Assay of the phenolic profile of merlot wines from Macedonia: Effect of maceration time, storage, SO2 and temperature of storage

2009 ◽  
Vol 28 (2) ◽  
pp. 141 ◽  
Author(s):  
Violeta Ivanova ◽  
Marina Stefova ◽  
Borimir Vojnoski
Keyword(s):  
Storage Temperature ◽  
Total Phenolics ◽  
Total Flavonoids ◽  
Phenolic Profile ◽  
Polyphenol Compounds ◽  
Phenolic Contents ◽  
Total Anthocyanins ◽  
Higher Temperature ◽  
Three Stages ◽  
And Storage

Spectrophotometric assays of total anthocyanins, total phenolics, total catechins, total flavonoids, color intesity and hue were performed on Merlot wines obtained with 3, 6 and 10 days of maceration, containing 30 and 70 ppm SO2. Changes of phenolic contents were observed during three stages of the wines: after maceration, after 6 and 16 months in order to check the effect of maceration time, SO2 and storage of the wines. Wines were stored at low and higher temperature to check also the influence of storage temperature on the studied parameters. It was found that maceration time influences the content of polyphenol compounds, observing increasing of their concentrations with increased maceration time, while lower contents were measured in the wines after 16 months of storage (3006, 1732 and 1602 mg/l total phenolics and 478, 188 and 98.5 mg/l total anthocyanins, after maceration, after 6 and 16 months of storage, respectively, in wine with 30 ppm SO2). SO2 had not a significant effect, whereas higher temperature caused slight changes of polyphenols contents. 

scholarly journals Improved Current Doubler Rectifier

2018 ◽  
Author(s):  
Mihail Antchev
Keyword(s):  
Electrical Current ◽  
Electrical Circuit

It is widespread to examine and explain the functioning of the standard “Current Doubler Rectifier” as strictly symmetrical according to the electrical current through the two inductances. The present work challenges this consideration and proposes a new version of the electrical circuit daigram where the current symmetry is improved. The proposed circuit is called “Improved Current Doubler Rectifier”.

Sign in / Sign up

Export Citation Format

Share Document