scholarly journals The Influence of AC Driving Current on Magnetoimpedance in [Ni80Fe20/Cu]x/Cu/[Ni80Fe20/Cu]6-x Multilayers

2021 ◽  
Vol 5 (1) ◽  
pp. 44
Author(s):  
Dian Afif Rusydan ◽  
Ismail Ismail ◽  
Artono Dwijo Sutomo ◽  
Utari Utari ◽  
Budi Purnama
Keyword(s):  
Room Temperature ◽  
Multilayer Film ◽  
Interlayer Coupling ◽  
Skin Depth ◽  
Ratio Increase ◽  
Electrodeposition Method ◽  
Driving Current ◽  
Measurement Results ◽  
Film Preparation

The phenomenon of magnetoimpedance in the multilayer configuration of [Ni80Fe20/Cu]x/Cu/[Ni80Fe20/Cu]6-x with x = 1, 2, and 3 has been successfully investigated. The electrodeposition method used for the multilayer film preparation on the meander pattered of Cu PCB. The obtained multilayer samples were evaluated the MI effect at room temperature with a frequency of 100 kHz. Here, the MI effects were evaluated for a variation of the AC driving current i.e. IAC = 4 mA, 8 mA, 12 mA, 16 mA, and 20 mA. The MI measurement results show that the multilayer x = 3 has the largest MI ratio and the multilayer with x = 1 was the smallest one. It is indicated that interlayer coupling contributes to the MI effect.  Whereas the skin depth also confirms to contribute the MI ratio that showed the MI ratio increase with the increase of the I<sub>AC</sub>.

The Study on Microstructural and Optical Properties of Nanocrystalline Germanium Films

2010 ◽  
Vol 663-665 ◽  
pp. 324-327
Author(s):  
Chao Song ◽  
Rui Huang
Keyword(s):  
Multilayer Structure ◽  
Room Temperature ◽  
Multilayer Film ◽  
Volume Fraction ◽  
Raman Scattering Spectroscopy ◽  
Force Microscopy ◽  
Room Temperature Photoluminescence ◽  
Atomic Force ◽  
Lower Volume Fraction ◽  
Lower Volume

The germanium film and Ge/Si multilayer structure were fabricated by magnetron sputtering technique on silicon substrate at temperatures of 500°C. Raman scattering spectroscopy measurements reveal that the nanocrystalline Ge occurs in both kinds of samples. Furthermore, from the atomic force microscopy (AFM) results, it is found that the grain size as well as spatially ordering distribution of the nc-Ge can be modulated by the Ge/Si multilayer structure. The room temperature photoluminescence was also observed in the samples. However, compared with that from the nc-Ge film, the intensity of PL from the nc-Ge/a-Si multilayer film becomes weaker, which is attributed to its lower volume fraction of crystallized component.

scholarly journals ANALISIS CAPACITY CONSTRAINED WORKER DENGAN PENDEKATAN WAKTU BAKU, DENYUT JANTUNG DAN PROFILE OF MOOD STATES (STUDI KASUS PADA INDUSTRI TEMPE “MUCHLAR”KASIHAN BANTUL)

2014 ◽  
Vol 34 (03) ◽  
pp. 322
Author(s):  
Maman Zuriwiatma ◽  
Mirwan Ushada ◽  
Guntarti Tatik Mulyati
Keyword(s):  
Room Temperature ◽  
Buffer Management ◽  
Mood States ◽  
Working Environment ◽  
Profile Of Mood States ◽  
Standard Time ◽  
Measurement Results ◽  
Capacity Constrained ◽  
Potential Food ◽  
Production Target

Tempe ”Muchlar” is one the potential food indutry which all the job is pursued manually. The production process is based on the worker capacity. The main problem is the industry could not fulfi ll the production target of half-finished Tempe product of + 3.600 kg.  The research objective is to identify Capacity Constrained Worker using standard time, heart rate, profi le of mood states and recommending the improvement to increase the worker capacity. The measurement results were confi rmed using analysis of working environment. The research results indicated that Capacity Constrained Worker of Tempe Industry was the worker of peeling. It was indicated by the standard time of 5,63 detik/kg that could not fulfi ll the production target of 3.600 kg in 5 work hours. The improvement was pursued by decreasing the room temperature of working station. The improvement could increase the standard time of 5 second/kg, fulfi lling the production target and increasing the income. Finally the improvement using Buffer Management could improve the Capacity Constrained Worker in Tempe Industry “Muchlar”.Keywords: Standard time, Capacity Constrained Worker, production target ABSTRAKTempe ”Muchlar” merupakan salah satu industri pangan yang semua pekerjaannya dilakukan manual sehingga proses  produksinya sangat tergantung kapasitas dari pekerja. Permasalahan muncul karena target produksi tempe setengah jadi sebesar + 3.600 kg tidak tercapai.  Penelitian ini bertujuan untuk mengidentifi kasi Capacity Constrained Worker yang terjadi menggunakan pendekatan waktu baku, denyut jantung, profile of mood states serta menentukan perbaikan yang tepat untuk dapat meningkatkan kapasitasnya. Hasil pengukuran terhadap pekerja dikonfi rmasi dengan analisis keadaan lingkungan kerja. Dari hasil penelitian dapat ditentukan bahwa pekerja yang menjadi Capacity Constrained Worker adalah pekerja stasiun pemisahan kulit. Hal ini dibuktikan dari waktu baku yang diperoleh sebesar 5,63 detik/kg yang membuat target produksi sebesar 3.600 kg dalam 5 jam tidak tercapai. Dengan perbaikan yang dilakukan yaitu menurunkan suhu ruangan dari tinggi ke normal waktu baku pekerja dapat meningkat menjadi 5 detik/kg dan target produksi dapat tercapai serta meningkatkan pendapatan. Perbaikan dengan menerapkan buffer management dapat mengurangi stasiun kerja yang menjadi constraint. Kata kunci: Waktu baku, Capacity Constrained Worker, target produksi

Intercalation of Acceptors and Donors in Highly Ordered Graphite Fibers

1982 ◽  
Vol 20 ◽  
Author(s):  
T.C. Chieu ◽  
G. Timp ◽  
M.S. Dresselhaus
Keyword(s):  
Raman Spectroscopy ◽  
Room Temperature ◽  
Skin Depth ◽  
X Ray Diffraction ◽  
Repeat Distance ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
X Ray ◽  
Order Of Magnitude ◽  
Graphite Fibers

ABSTRACTThe intercalation of various acceptors and donors into graphite fibers, prepared from benzene-derived precursor materials is investigated by Raman spectroscopy, x-ray diffraction, electron diffraction, lattice fringing, and electrical resistivity measurements. Evidence for formation of well-staged acceptor compounds is provided by Debye-Scherrer x-ray diffraction which probes the bulk fiber and by Raman spectroscopy which probes an optical skin depth (< 0.1 μm). Lattice fringing measurements provide direct observation of large regions (up to 50 Aring; × 400 Aring;) of defectfree single-staged regions. Values for the c-axis repeat distance Ic are obtained by indexing (00l) lines of the x-ray diffraction pattern. Raman results show characteristic upshifted modes for stage 1 acceptor compounds with a sharpening in linewidth as compared to the E2g2 mode of the pristine fiber. The room temperature electrical conductivity is increased about an order of magnitude upon intercalation and exhibits a metallic dependence on temperature. The highest air-stable room temperature conductivity 1.4 × 105 (Ω-cm)−l ever reported for an intercalated fiber has been achieved.

Achievements and Characterizations of GaN With Ga-Polarity in Radio-Frequency Plasma-Assisted Molecular Beam Epitaxy

2000 ◽  
Vol 622 ◽  
Author(s):  
X.Q. Shen ◽  
T. Ide ◽  
S.H. Cho ◽  
M. Shimizu ◽  
S. Hara ◽  
...  
Keyword(s):  
Room Temperature ◽  
Molecular Beam ◽  
Hall Effect Measurement ◽  
Radio Frequency Plasma ◽  
Ion Scattering ◽  
Rocking Curve ◽  
Initial Stage ◽  
Frequency Plasma ◽  
Measurement Results ◽  
Scattering Spectra

ABSTRACTLattice polarities and film qualities of GaN grown by rf-MBE were investigated concentrating on the use of different buffer layer processes at the initial stage. Direct clarifying by coaxial impact collision ion scattering spectra technique, together with RHEED and chemical wet etching, were applied to identify the lattice polarity of GaN films. XRD rocking curve and photoluminescence results showed that the qualities of GaN films with Ga-polarity were dramatic improved compared to those with N-polarity. Hall effect measurement results indicated that the mobility of the Ga-face film was increased to one order higher (568 cm2/Vs in maximum at room temperature) than that of N-face one.

The Properties of GaInAsSb/GaSb Heterostructure Grown by Mocvd and P-GaInAsSb/N-GaSb Photodiodes

1995 ◽  
Vol 415 ◽  
Author(s):  
Baolin Zhang ◽  
Yixin Jin ◽  
Tianming Zhou ◽  
Hong Jiang ◽  
Yongqiang Ning ◽  
...  
Keyword(s):  
Vapor Deposition ◽  
Room Temperature ◽  
Metalorganic Chemical Vapor Deposition ◽  
Hole Concentration ◽  
Chemical Vapor ◽  
Infrared Transmission ◽  
Long Wavelength ◽  
Measurement Results ◽  
P Type ◽  
Metalorganic Chemical

ABSTRACTGaInAsSb/GaSb heterostructures have been grown by metalorganic chemical vapor deposition (MOCVD). The optical properties were characterized using low temperature(71K) photoluminescence(PL) and infrared transmission spectroscopy. The FWHM of the typical PL spectrum peaked at 2.3μm is 30meV. Hall measurement results for undoped GaInAsSb layers are presented showing a p-type background and low hole concentration of 6.5 × 1015cm−3. The room temperature performances of the p-GaInAsSb/n-GaSb photodiodes are reported. Its responsivity spectrum is peaked at 2.2 5μm and cuts off at 1.7μm in the short wavelength and at 2.4μm in the long wavelength, respectively. The room temperature detectivity D* is of 1 × 109cm.Hz1/2.W−2

scholarly journals Damage Induced by Neutron Radiation on Output Characteristics of Solar Cells, Photodiodes, and Phototransistors

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Biljana Simić ◽  
Dejan Nikolić ◽  
Koviljka Stanković ◽  
Ljubinko Timotijević ◽  
Srboljub Stanković
Keyword(s):  
Room Temperature ◽  
Neutron Emission ◽  
Optoelectronic Devices ◽  
Neutron Radiation ◽  
Solar Panels ◽  
Current Voltage ◽  
Measurement Results ◽  
Before And After ◽  
Current Voltage Characteristics ◽  
Output Characteristics

This study investigates the effects of neutron radiation onI-Vcharacteristics (current dependance on voltage) of commercial optoelectronic devices (silicon photodiodes, phototransistors, and solar panels). Current-voltage characteristics of the samples were measured at room temperature before and after irradiation. The diodes were irradiated using Am-Be neutron source with neutron emission of2.7×106 n/s. The results showed a decrease in photocurrent for all samples which could be due to the existence of neutron-induced displacement defects introduced into the semiconductor lattice. The process of annealing has also been observed. A comparative analysis of measurement results has been performed in order to determine the reliability of optoelectronic devices in radiation environments.

Experimental determination of thermal conductivity of composite materials in a wide range of values at room temperature

2019 ◽  
Author(s):  
A.N. Chistov ◽  
M.Yu. Kladov ◽  
I.B. Pronin ◽  
A.S. Smirnov
Keyword(s):  
Thermal Conductivity ◽  
Composite Materials ◽  
Room Temperature ◽  
Measurement Procedure ◽  
Thermal Mode ◽  
Wide Range ◽  
Measurement Results ◽  
Transfer Problems ◽  
Range Of Values

In developing new composite materials and solving heat transfer problems, the thermal conductivity is an important characteristic that must be reliably determined. This often requires samples of the smallest dimensions, which is relevant for the production of pilot batches of material, as well as if they are taken directly from the product, when the amount of material is very limited. Most common methods for determining thermal conductivity require samples of relatively large sizes. To measure thermal conductivity on small-sized samples, an upgraded benchtop instrument is introduced. The instrument uses the relative method of longitudinal heat flux, which consists in a comparative measurement of a sample located between the heater and the standard in a stationary thermal mode. This paper presents the instrument design details, the requirements for the samples, explains the calibration features and the measurement procedure. The measurement results in a number of composite materials, as well as in materials with well-studied properties are analyzed. Findings show that the error of determining the thermal conductivity on a modernized instrument does not exceed several percent.

Multilayer film preparation of poly(4-vinylphenol) from aqueous media

2008 ◽  
Vol 202 (24) ◽  
pp. 6109-6112 ◽  
Author(s):  
Ronny Priefer ◽  
Kathryn E. Leach ◽  
Todd D. Krauss ◽  
Jeanette R. Drapo ◽  
Michelle L. Ingalsbe ◽  
...  
Keyword(s):  
Multilayer Film ◽  
Aqueous Media ◽  
Film Preparation

scholarly journals Annealing Temperature Effects on the Optical Properties of CdO Thin Films Deposited by CSP Technique

2014 ◽  
Vol 42 ◽  
pp. 63-71 ◽  
Author(s):  
Sami Salmann Chiad
Keyword(s):  
Optical Properties ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Energy Gap ◽  
Skin Depth ◽  
Spray Pyrolysis Method ◽  
Chemical Spray Pyrolysis ◽  
Chemical Spray ◽  
Uv Visible ◽  
Cdo Thin Films

By chemical spray pyrolysis method. The CdO thin film prepared at constant film thickness (350 nm). The prepared films are annealed at a temperature of 450 and 500 °C. The optical properties are calculated from the measurement of UV-Visible spectrophotometer spectrum in the range of (300-900) nm at room temperature. The transmittance, absorption coefficient, extinction coefficient, refractive index, and skin depth are calculated as annealing temperature. The energy gap decreased from 2.52 eV to 2.47 eV when the annealing temperature increased from room temperature to 500 °C.

scholarly journals Baby Incubator Based on PID Control With Kangaroo Mode (Kangaroo Mode and Humidity)

2019 ◽  
Vol 1 (2) ◽  
pp. 13-17
Author(s):  
Nur Fildzah Hidayati ◽  
Endro Yulianto ◽  
Abd. Kholiq
Keyword(s):  
Birth Weight ◽  
Low Birth Weight ◽  
Pid Control ◽  
Room Temperature ◽  
Temperature Stability ◽  
Premature Babies ◽  
Measurement Results ◽  
Low Costs ◽  
Skin To Skin ◽  
Electromedical Equipment

Baby Incubator is one of the electromedical equipment used to provide protection to premature babies or low birth weight. Baby care in the baby incubator causes separation of mother and baby. A new innovation in the care of premature babies who bring their babies and mothers closer is Kangaroo Method Management (PMK). Kangaroo method treatment aims to create emotional attachment to the baby, so that the mother will confidently take care. The research and manufacture of this module uses a method of treating baby incubator by adding a reading of the room temperature when the kangaroo mode runs at a setting of 34 ° C - 37 ° C with the effect of room temperature at 18 ° C, 24 ° C, and 30 ° C and setting the humidity control automatically by measuring at a temperature of 32 ° C, then measuring the results immediately. Sensors used to detect temperature are LM35 sensors and sensors used to detect humidity using DHT22. Based on the measurement results obtained uncertainty values ​​on the measurement of humidity 2.1, the measurement of temperature stability can be seen from the results of the graph which shows that the room temperature is not too influential at the temperature of the baby incubator. This study has shown the development of baby incubators to help mothers who have babies born prematurely so that they can have a good bond with how to treat skin to skin. This study has proven that its accuracy is appropriate to be used to stabilize the condition of babies born prematurely and help to treat PMK in some hospitals. In the future, this research can be made and used in small clinics in villages at low costs.

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