bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of chelating agents on removal of 137Cs from contaminated soil
Authors: Radhi Firas M.
Published: August 2020

In the present research, the chemical washing method has been selected using three chelating agents: citric acid, acetic acid and Ethylene Diamine Tetraacetic Acid (EDTA) to remove 137Cs from two different contaminated soil samples were classified as fine and coarse grained. The factors that affecting removal efficiency such as type of soil, mixing ratio and molarity have been investigated. The results revealed that no correlation relation was found between removal efficiency and the studied factors. The results also showed that conventional chemical washing method was not effective in removing 137Cs and that there are further studies still need to achieve this objective.
Study of matter density distributions, elastic charge form factors and size radii for halo 11Be, 19C and 11Li nuclei
Authors: Abbas Zaid M.
Published: August 2020

In this work, the calculation of matter density distributions, elastic charge form factors and size radii for halo 11Be, 19C and 11Li nuclei are calculated. Each nuclide under study are divided into two parts; one for core part and the second for halo part. The core part are studied using harmonic-oscillator radial wave functions, while the halo part are studied using the radial wave functions of Woods-Saxon potential. A very good agreement are obtained with experimental data for matter density distributions and available size radii. Besides, the quadrupole moment for 11Li are generated.
Study the effect of Iraqi weather parameter in FSO communication using different wavelength (650, 532) nm
Authors: Abdullah Abdullah A.
Published: August 2020

Light has already becomes a popular means of communication, and the high-bandwidth data into free space without the use of wires. A great idea took us to design a new system for transmitting sound through free space at (650, 532) nm wavelengths using reflective mirrors under different atmospheric conditions. The study showed us the effect of various weather factors (temperature, wind speed and humidity) on these wavelengths for different distances. As well as studying the attenuation caused by long-distance laser and beam divergence, A reflective dish was used to focus the spot of the laser beam on the photocell. Results were discussed under the effect of these factors and the attenuation resulting from the beam divergence. Thus, the system performance can be improved for range and the quantity transfer data by increasing transmitted power and reducing the divergence of the laser beam.
Spectroscopic analysis of magnesium-aluminum alloys by laser induced breakdown spectroscopy
Authors: Hussain Ali A-K.
Published: August 2020

In this work, the spectra of plasma glow produced by Nd:YAG laser operated at 1.064 μm on Al-Mg alloys with same molar ratio samples in air were analyzed by comparing the atomic lines of aluminum and magnesium with that of strong standard lines. The effect of laser energies on spectral lines, produced by laser ablation, were investigated using optical spectroscopy, the electron density was measured utilizing the Stark broadening of magnesium-aluminum lines and the electron temperature was calculated from the standard Boltzmann plot method. The results that show the electron temperature increases in magnesium and aluminum targets but decreases in magnesium: aluminum alloy target, also show the electron density increase all the aluminum, magnesium and mix both them, It was found that the lines intensities at different laser peak powers increase when the laser peak power increases then decreases when the power continues to increase.
The influence of argon gas flow in the killing of staphylococcus epidermidis bacteria
Authors: Shihab Ahmed Mahmoud
Published: August 2020

In this research, non-thermal plasma system of argon gas is designed to work at normal atmospheric pressure and suitable for work in medical and biotechnological applications. This technique is applied in the treatment of the Staphylococcus epidermidis bacteria and show the role of the flow rate of Argon gas on the killing rate of bacteria, and it obtained a 100 % killing rate during the time of 5 minutes at the flow Argon gas of 5 liters/ min.
Classification of brain tumors using the multilayer perceptron artificial neural network
Authors: Omar Raid Adnan
Published: August 2020

Information from 54 Magnetic Resonance Imaging (MRI) brain tumor images (27 benign and 27 malignant) were collected and subjected to multilayer perceptron artificial neural network available on the well know software of IBM SPSS 17 (Statistical Package for the Social Sciences). After many attempts, automatic architecture was decided to be adopted in this research work. Thirteen shape and statistical characteristics of images were considered. The neural network revealed an 89.1 % of correct classification for the training sample and 100 % of correct classification for the test sample. The normalized importance of the considered characteristics showed that kurtosis accounted for 100 % which means that this variable has a substantial effect on how the network perform when predicting cases of brain tumor, contrast accounted for 64.3 %, correlation accounted for 56.7 %, and entropy accounted for 54.8 %. All remaining characteristics accounted for 21.3-46.8 % of normalized importance. The output of the neural networks showed that sensitivity and specificity were scored remarkably high level of probability as it approached % 96.
Gas sensing performance of Sol-gel grown NiO-doped Cr2O3 nanoparticles
Authors: Hassan Tunis B.
Published: August 2020

The sensors based on Nickel oxide doped chromic oxide (NiO: Cr2O3) nanoparticals were fabricated using thick-film screen printing of sol-gel grown powders. The structural, morphological investigations were carried out using XRD, AFM, and FESEM. Furthermore, the gas responsivity were evaluated towards the NH3 and NO2 gas. The NiO0.10: Cr2O3 nanoparticles exhibited excellent response of 95 % at 100oC and better selectivity towards NH3 with low response and recovery time as compared to pure Cr2O3 and can stand as reliable sensor element for NH3 sensor related applications.
Effect of SiO2 particles on the biodegradability of starch/PVA blends
Authors: H. Nahida J.
Published: August 2020

The present work aimed to study the SiO2μPs, and NPs effect on the biodegradability of St/PVA blends. The samples were prepared by casting method as PVA, St/PVA blends with different concentrations (30, 40, 50, and 60 %). FTIR test was carried out for the samples preparation. The results proved some changes which might be related to changing in crystallinity of St/PVA matrix as well as physical incorporation of SiO2 μPs, and NPs addition. The enzymatic test and water uptake results proved that increase in weight loss with increases of starch ratio. The lowest weight loss was PVA; the highest weight loss is 60% St/PVA whereas the lowest weight loss is 30%St/PVA for blends involved. SiO2μPs (753.7 nm), and NPs (263.1 nm) were added at different concentrations (1.5, 2, and 2.5 %). 1.5% SiO2 μPs, and NPs were the lowest weight loss then it was increased by SiO2μPs, and NPs addition. The samples were investigated with optical microscope. It was concluded that the samples involved could be used as packaging materials for medical application and its degradation could be controlled by SiO2μPs, and NPs addition.
Measurements of radon gas concentration in surface soil in Baghdad city
Authors: Ibrahim Ola Adil
Published: August 2020

In the present work, radon gas concentrations in different surface soil samples in Baghdad governorate were measured using RAD-7 detector. The results have been shown that, the Radon gas concentrations ranged between (41.67±1.78Bq/m3), to (185.67±4.22Bq/m3), a map showing the distribution of the concentration of radon in selected areas was defined to identify areas with high pollution level. The reason for the high concentration of radon is that these surface soil samples are taken from agricultural areas. It is also known that fertilizers contain uranium levels as well as areas bombed in wars in the country. It is worth noting that all radon concentrations in Baghdad governorate are below the recommended minimum of 200-300Bq/m3) (International Commission on Radiation Protection, ICRP, 2009).
Responsivity of porous silicon for blue visible light with high sensitivity
Authors: Ali Iftikhar M.
Published: August 2020

In this work, porous silicon (PS) are fabricated using electrochemical etching (ECE) process for p-type crystalline silicon (c-Si) wafers of (100) orientation. The structural, morphological and electrical properties of PS synthesized at etching current density of (10, 20, 30) mA/cm2 at constant etching time 10 min are studied. From X-ray diffraction (XRD) measurement, the value of FWHM is in general decreases with increasing current density for p-type porous silicon (p-PS). Atomic force microscope (AFM) showed that for p-PS the average pore diameter decreases at 20 mA. Porous silicon which formed on silicon will be a junction so I-V characteristics have been studied in the dark to calculate ideality factor (n), and saturation current (Is) for these junctions. These junctions are used in photo sensors applications, where the photo sensors have been examined at blue light region. Sensitivity, rise and fall times have been calculated for this wavelength, the maximum value for sensitivity is (3797.6 %) at etching current density 10 mA/cm2 under blue light illumination at zero bias voltage.
Characterization of thermo-physical and hardness properties of unsaturated polyester resin hybrid nano composites Sihama Issa Salih1, Waleed Bdaiwi Salih2, Husam Sakin Hamad2
Authors: Salih Sihama Issa
Published: August 2020

In this work, two groups of nanocomposite material, was prepared from unsaturated polyester resin (UPE), they were prepared by hand lay-up method. The first group was consisting of (UPE) reinforced with individually (ZrO2) nanoparticles with particle size (47.23nm). The second group consists of (UPE) reinforced with hybrid nanoparticles consisting of zirconium oxide and yttrium oxide (70% ZrO2 + 30% Y2O3) with particles size (83.98nm). This study includes the effect of selected volume fraction (0.5%, 1%, 1.5%, 2%, 2.5%, 3%) for both reinforcement nano materials. Experimental investigation was carried out by analyzing the thermo-physical properties like thermal conductivity, thermal diffusivity and specific heat for the polymeric composites samples, as well as the hardness test. The results showed that the values of (hardness, specific heat) increased as the nanoparticle content in composite samples increased for both groups’ nanocomposites, whereas the values of thermal conductivity and thermal diffusion decrease for both groups composites. And it was found that the properties of composite materials reinforced by hybrid nanoparticles have higher properties as compared with their counterparts of other nanocomposite reinforced by zirconia nanoparticle. The morphology of the fracture surface was showed homogeneous micro structure formation for both groups composites, indicating a good compatibility between the matrix material and the reinforcement nanoparticles.
Inelastic mean free path of swift electrons and stopping power in Ta2O5
Authors: Shakir Ishraq Ahmed
Published: August 2020

Energy Loss Function (ELF) of 2 5 Ta O derived from optical limitand extended to the total part of momentum and their energyexcitation region ELF plays an important function in calculatingenergy loss of electron in materials. The parameter Inelastic MeanFree Path (IMFP) is most important in quantitative surface sensitiveelectron spectroscopies, defined as the average distance that anelectron with a given energy travels between successive inelasticcollisions. The stopping cross section and single differential crosssectionSDCS are also calculated and gives good agreement withprevious work.
Effect of annealing temperature on structural and optical properties of Cr2O3 thin films by PLD
Authors: Suhail Mahdi Hasan
Published: August 2020

In the present work, pulsed laser deposition (PLD) technique was applied to a pellet of Chromium Oxide (99.999% pure) with 2.5 cm diameter and 3 mm thickness at a pressure of 5 Tons using a Hydraulic piston. The films were deposited using Nd: YAG laser λ= (4664) nm at 600 mJ and 400 number of shot on a glass substrate, The thickness of the film was (107 nm). Structural and morphological analysis showed that the films started to crystallize at annealing temperature greater than 400 oC. Absorbance and transmittance spectra were recorded in the wavelength range (300-4400) nm before and after annealing. The effects of annealing temperature on absorption coefficient, refractive index, extinction coefficient, real and imaginary parts of dielectric constant were also study. It was found that all these parameters decrease as the annealing temperature increased to 500 °C, while the energy gap after annealing increase from 3.4 eV to 3.85 eV.
Improvement of superconducting parameters of Bi1.6Pb0.4Sr 2Ca 2Cu 3O10+ δ added with Au nanoparticles
Authors: Jassim Amal K.
Published: August 2020

Samples of Bi1.6Pb0.4Sr2Ca2Cu3O10+δ superconductor were prepared by solid-state reaction method to study the effects of gold nanoparticles addition to the superconducting system, Nano-Au was introduced by small weight percentages (0.25, 0.50, 0.75, 1.0, and 1.25 weight %). Phase identification and microstructuralcharacterization of the samples were investigated using XRD and SEM. Moreover, DC electrical resistivity as a function of the temperature, critical current density Jc, AC magnetic susceptibility, and DC magnetization measurements were carried to evaluate the relative performance of samples. x-ray diffraction analysis showed that both (Bi,Pb)-2223 and Bi-2212 phases coexist in the samples having an orthorhombic crystal structure. Both the onset critical temperatures Tc (onset) and zero electrical resistivity critical temperatures Tc (R=0) of the samples were determined from the DC electrical resistivity measurements. An improvement of the superconducting transition temperature of 6.36 % was obtained with increasing Au nanoparticles to x = 1.25 wt.%, while the critical current density is improved by 220 %. AC magnetic susceptibility measurement showed that the diamagnetic fraction and intergranular coupling of the x = 1.25 wt.% sample are greater than those of the others. The variation of magnetization with temperature (M-T curve) of the samples was measured by cooling the sample in zero fields (ZFC) and an applied field of 10 Oe (FC). The results of AC magnetic susceptibility and DC magnetization measurements were in good agreement with DC electrical resistivity measurement.
The effect of heat treatment on the optical properties of organic semiconductor (NiPc/C60) thin films
Authors: Mkhaiber Atheer M.
Published: August 2020

Thin films of the blended solution of (NiPc/C60) on glass substrates were prepared by spin-coated method for three different ratios (100/1, 100/10 and 100/100). The effects of annealing temperature and C60 concentration on the optical properties of the samples were studied using the UV-Vis absorption spectroscopy and FTIR spectra. The optical absorption spectrum consists of two main bands, Q and B band, with maxima at about (602-632) nm and (700-730) nm for Q1 and Q2 respectively, and (340-375) nm for B band. The optical energy gap were determined from optical absorption spectra, The variation of optical energy gap with annealing temperature was nonsystematic and this may be due to the improvement in crystal structure for thin films. While the energy gap decreased by increasing the concentration of C60 approaches from the energy gap of this compound.
Functionalization of single and multi-walled carbon nanotubes by chemical treatment
Authors: Ahmed Akram Sh.
Published: August 2020

In this work we experimentally investigated SWCNTs and MWCNTs to increase their thermal conductivity and electrically functionalization process using different reagents ((nitric acid, HNO3 followed by acid treatment with H2SO4), then washed with deionized water (DW) and then treated with H2O2 via ultrasonic technique. Then repeated the steps with MWCNTs and compare their results in an effort to improve experimental conditions that efficiently differentiate the surface of the single walled carbon nanotubes (SWCNTs) and multi walled carbon nanotubesi(MWCNTs) that less nanotubes destroy and to enhance the properties of them and also to reduce aggregation in liquid. the results were prove by XRD, and infrared spectroscopy (FTIR). The FTIR spectrum shows the presence of carboxylic group after treatment with (acid oxidation and H2O2) and refers to Functionalization (SWCNTs) and (MWCNTs) on the surface wall microscopic images show surface adjustment on SWCNTs and ((MWCNTs)) structure after any treatment. AT last, a fully of SWCNTs and MWCNTSIwere obtained successfully accomplished with the reduction of the collapsed structure.
Synthesis and structural characteristics of Co1-xCuxFe2O4 magnetic ferrite nanoparticles using hydrothermal technique
Authors: Mutlak Falah A-H.
Published: August 2020

In this work, copper substituted cobalt ferrite nanoparticles withchemical formula Co1-xCuxFe2O4 (x=0, 0.3, and 0.7), has beensynthesized via hydrothermal preparation method. The structure ofthe prepared materials was characterized by X-ray diffraction (XRD).The (XRD) patterns showed single phase spinel ferrite structure.Average crystallite size (D), lattice constant (a), and crystal density(dx) have been calculated from the most intense peak (311).Comparative standardization also performed using smaller averageparticle size (D) on the XRD patterns of as-prepared ferrite samplesin order to select most convenient hydrothermal synthesis conditionsto get ferrite materials with smallest average particle size.
Optical and structural study for DLC thin films prepared by plasma jet
Authors: Kadhem S. J.
Published: August 2020

Diamond-like carbon (DLC) homogeneous thin films were deposited from cyclohexane (Ccyclohexane (Ccyclohexane (Ccyclohexane (C cyclohexane (Ccyclohexane (Ccyclohexane (C cyclohexane (Ccyclohexane (C 6H12 ) liquid by using a plasma jet system which operates with alternating high voltage 7.5 which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5 which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5 which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5 which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5 which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5 which operates with alternating high voltage 7.5 which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5 which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5 which operates with alternating high voltage 7.5 which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5which operates with alternating high voltage 7.5 kv and kv and kv and kv and frequency 28 frequency 28frequency 28 frequency 28frequency 28frequency 28frequency 28frequency 28 kHz. kHz. The optical and structural properties and chemical bonding of these films were investigated. In this work, the effect of changing the distance between the substrate and the plasma torch (2, 2.5 and 3 cm) was studied. The flow rate of argon gas which used to generate the plasma was fixed (0.5 L/min). These films were characterized by UV–Visible spectrophotometer, X-ray diffractometer (XRD) and scanning electron microscopy (SEM) and Fourier transformation infrared spectroscopy (FTIR). The maximum absorption (λmax) appears around 312, 298.3 and 293.2 nm at the three distance between plasma torch and the substrate 2.5, 2 and 3 cm, respectively. The values of the optical energy gap are 3.47, 3.65 and 3.76 eV at a different distance (2, 2.5 and 3cm), respectively. In XRD diffraction pattern, The occurrence of diamond peaks and graphite peaks in the x-ray spectrum for these films Indicates that there is an occurrence of local ordered sp3 and sp2 for carbon domains and graphite respectively.
Spectroscopic investigation of Rhodamine-B thin film prepared by PLD technique
Authors: Hussain Ali A-K.
Published: August 2020

Optical properties of Rhodamine-B thin film prepared by PLDtechnique have been investigated. The absorption spectra using1064nm and 532 nm laser wavelength of different laser pulseenergies shows that all the curves contain two bands, B band and Qbands with two branches, Q1 and Q2 band and a small shift in thepeaks location toward the long wavelength with increasing laserenergy. FTIR patterns for Rhodamine-B powder and thin film withinshows that the identified peaks were located in the standard valuesthat done in the previous researches. X-ray diffraction patterns ofpowder and prepared Rhodamine-B thin film was display that thepowder has polycrystalline of tetragonal structure, while the thin filmhas an amorphous structure. SEM images for Rhodamine-B, showshomogeneous distributed cauliflower-like nanostructures attachedwith each other. FM diagram shows that the average grain size wasfound to be 68.52 nm and the RMS surface roughness was 1.68 nm.
Determination of uranium concentrations for soil of Tigris river and rainwater of Baghdad city
Authors: Said Mona Ahmed
Published: August 2020

In this study, phosphorescence analysis (KPA) is used for determining soil collected from the Tigris River from Al- Karrada and Bab Al-Sharq in Baghdad and samples were taken from rainwater collected from Al-Rashad, Al-Obeidi, Al-Dora and Al-Sadr City in Baghdad. The measurements were carried out by the Iraqi Ministry of Health and Environment, in the Radiation Protection Center. The collection, removal and evaporation of the samples ranged from January to the end of March 2018. The results show the presents of concentration of 238U and 235U in soil samples and the rainwater samples. The conclusion of this work is the concentration of uranium in soil samples is more than recommendations by ICRP value of 1.9 μg /l. While all water samples can be compared with the value of WHO, which has a safe limit of 15 μg/l which is considered acceptable.
Weathering effects on the thermal conductivity of PS/PMMA blends for packaging application
Authors: H. Nahida J.
Published: August 2020

This work describes the weathering effects (UV-Irradiation, and Rain) on the thermal conductivity of PS, PMMA, PS/PMMA blend for packaging application. The samples were prepared by cast method at different ratios (10, 30, 50, 70, and 90 %wt). It was seen that the thermal conductivity of PMMA (0.145 W/m.K), and for PS(0.095 W/m.K), which increases by PS ratio increase up to 50% PS/PMMA blend then decreased that was attributed to increase in miscibility of the blend involved. By UV-weathering, it was seen that thermal conductivity for PMMA increased with UV-weathering up to (30hr) then decreased, that was attributed to rigidity and defect formation, respectively. For 30%PS/PMMA, there results showed unsystematic decrease in thermal conductivity, which was attributed to unsystematic degradation. By Rain-weathering, thermal conductivity PS, PMMA, and 30 %PS, PMMA, it was seen systematic decreased in PS and 30 % PS/PMMA thermal conductivity; and systematic decrease in PMMA thermal conductivity. That due to the water diffusion in the samples that created some voids, bubbles, and results in decrease in thermal conductivity. This result was attributed to the decrease in adhesive between the components of polymer systems. The results suggested that the samples involved could be used for packaging application.
A Spectroscopic and structural study of FeCoSb alloy
Authors: Kadhem Saba J.
Published: August 2020

Fe, Co and Sb nanopowders were fruitfully prepared by electrical wire explosion method in Double distilled and de-ionized water (DDDW) media. The formation of iron, cobalt and antimony (FeCoSb) alloy nanopowder was monitored by X-ray diffraction. The x-ray diffraction pattern indicates that there are iron, cobalt and antimony peaks. Optical properties of this alloy nanoparticles were characterized by UV-Visible absorption spectra. The absorption peak position is shifted to the lower wavelengths when the current increases. That means the mean size of the nanoparticles controlled by changing the magnitude of the current. The surface morphological analysis is carried out by employing Scanning Electron Microscope (SEM). Particles with varies size were observed also from the images the some particles have uneven shapes with agglomerate and the other have spherical shape. The exploding FeCoSb alloy wire plasma parameters is study by optical emission spectroscopy. The emission spectra of the plasma have been recorded and analyzed. The plasma electron temperature (Te), was determined by Boltzmann plot, and the electron density (ne), by Stark broadening for wire with diameter 0.3 mm and current of 75A in distilled water.
Quality assurance of the linear accelerator device using Star Track and Perspex
Authors: Rejah Dr. Basim Khalah
Published: August 2020

In this study, the quality assurance of the linear accelerator available at the Baghdad Center for Radiation Therapy and Nuclear Medicine was verified using Star Track and Perspex. The study was established from August to December 2018. This study showed that there was an acceptable variation in the dose output of the linear accelerator. This variation was ±2% and it was within the permissible range according to the recommendations of the manufacturer of the accelerator (Elkta).
Investigation the effect of post deposition thermal treatment on properties P3HT and P3HT:PCBM blend.
Authors: Alkhazali Abeer Muhammad
Published: August 2020

This work reports the study of heat treatment effect on the structural, morphological, optical and electrical properties of poly [3-hexylthiophene] and its blend with [6,6]-phenyl C61 butyric acid methyl ester ( P3HT:PC61BM). X-ray diffraction (XRD) measurements show that the crystallinity of the films increased with annealing. The evaluation of surface roughness and morphology was investigated using atomic force microscope (AFM), and field emission scanning microscope(FESEM). The optical properties were emphasized a strong optical absorption of P3HT compared with the blend. Hall effect measurement was used to study the electrical properties which revealed there is an increase in the electrical conductivity and Hall mobility of the p-type P3HT and its blend with heat treatment.
Characterization of ZnO/GaAs heterojunction
Authors: Nasir Eman M.
Published: August 2020

ZnO thin films have been prepared by pulse laser deposition technique at room temperatures (RT). These films were deposited on GaAs substrate to form the ZnO/GaAs heterojunction solar cell. The effect of annealing temperatures at ( RT,100, 200)K on structural and optical properties of ZnO thin films has been investigated. The X-ray diffraction analysis indicated that all films have hexagonal polycrystalline structure. AFM shows that the grains uniformly distributed with homogeneous structure. The optical absorption spectra showed that all films have direct energy gap. The band gap energy of these films decreased with increasing annealing temperatures.  From the electrical properties, the carriers have n-type conductivity.  From C-V measurement of ZnO/GaAs heterojunciton solar cell at frequency 100, 200 KHz, It is found that built–in potential (Vbi) increases with increase frequency. Also, from I-V characteristic it is observed that the ideality factor is 2.7. Short-circuit current (Isc) is 4.0mA/cm2, open circuit voltage (Voc) is 0.5V, fill factor ( F.F) is 0.7  and the efficiency is about 6.0 %.
Optimization Procedures using Effect of Etalon Finesse and Driving Term on Optical Bistability
Authors: Khidhir Ali Hassan
Published: August 2020

In this work, analytical study for simulating a Fabry-Perot bistable etalon (F-P cavity) filled with a dispersive optimized nonlinear optical material (Kerr type) such as semiconductors Indium Antimonide (InSb). Because of a trade off between the etalon finesse values and driving terms, an optimization procedures have been done on the InSb etalon/CO laser parameters, using critical switching irradiance (Ic) via simulation systems of optimization procedures of optical cavity. in order to achieve the  minimum switching power and faster switching time, the optimization parameters of the finesse values and driving terms on optical bistability and switching dynamics must be studied.

        In addition, for different values of a cavity finesse (for example, F = 25 and 2.37) the switching intensity takes low values with a high finesse etalon compared to a high switching intensity with a low finesse etalon. So, the minimum switching power for a low finesse etalon is ⁓0.785mW, and is about 0.0785mW for a high finesse etalon. The driving term peak of a high finesse etalon becomes higher and the slowing down region becomes less, leading to a fast switching as compared with a slow switching in a low finesse etalon. So that, the minimum switching time was about 300ns for a low finesse etalon, and about 150ns for a high finesse etalon.
Chaotic features of energy spectrum in 68Ge Nucleus Using the Nuclear Shell Model
Authors: Abd ALabas Hayder Ali , Hamoudi Adel Khalaf
Published: August 2020

Chaotic features of nuclear energy spectrum in 68Ge nucleus are investigated by nuclear shell model. The energies are calculated through doing shell model calculations employing the OXBASH computer code with effective interaction of F5PVH. The 68Ge nucleus is supposed to have an inert core of 56Ni with 12 nucleons (4 protons and 8 neutrons) move in the f5p-model space ( and ). The nuclear level density of considered classes of states is seen to have a Gaussian form, which is in accord with the prediction of other theoretical studies. The statistical fluctuations of the energy spectrum (the level spacing P(s) and the Dyson-Mehta (or statistics) are well described by the Gaussian orthogonal ensemble (GOE). Furthermore, these fluctuations are independent on the spin J.
Effect of estrogen receptor gene ESR1 polymorphism on development of premenstrual syndrome
Authors: Pakharenko L. V.
Published: August 2020

To identify risks of development of any disease is a priority of modern medicine. The aim of this study was to investigate the frequency of polymorphic variants of A-351G gene estrogen receptor ESR1 in patients with various forms of PMS. Molecular genetic analysis of ESR1 gene polymorphism in 50 women with PMS (25 women of them had edematous form of disease, 25 – neuropsychical, 25 – mild, 25 – severe form) was carried out. 25 women without diagnosis of PMS were examined as controls. The study A-351G polymorphism estrogen gene ESR1 showed no statistically significant differences in the frequency of distribution of gen-otypes and alleles between women with PMS and without this pathology. However, the frequency of GG genotype in women with severe PMS was significantly higher in 8.0 times compared with healthy women (χ2=4.87, p=0.03) and in women with edematous form of PMS – in 7.0 times (χ2=3.72, p=0.05). Thus, a polymorphic variant of A-351G gene ESR1 estrogen can be considered as a marker of PMS. Pathologi-cal variant GG genotype was significantly associated with the presence of edematous and severe forms of the disease.
KINERJA MESIN BUBUT GEMINIS DITINJAU DARI KEBULATAN BENDA KERJA
Authors: Yudo Eko , Ariyanto Ariyanto
Published: August 2020

Mesin perkakas dibidang manufaktur yang menghasilkan benda kerja dengan ketelitian yang tinggi sangat diperlukan untuk dunia Industri Manufaktur. Mesin perkakas yang menghasilkan benda kerja (penyimpangan kebulatan yang rendah ) dengan kualitas baik akan menghasilkan harga sebanding dengan yang ditawarkan. Sehingga  menuntut perawatan dan pemeliharaan mesin yang lebih optimum. Laboratorium Mekanik Politeknik Manufaktur Negeri Bangka Belitung mempunyai beberapa mesin bubut untuk menghasilkan benda kerja berupa produk latihan mahasiswa, suku cadang mesin dan kegiatan produksi dengan ukuran yang presisi, mesin bubut ini sudah digunakan selama kurang lebih 20 tahun, pemakaian yang terbilang sudah lama dapat mengakibatkan terjadinya perubahan penyimpangan geometri mesin. Penyimpangan yang terjadi akan mempengaruhi kualitas produk yang dihasilkan. Di antara mesin bubut ada mesin bubut Geminis berjumlah 3 unit. Untuk mengetahui penyimpangan kebulatan yang terjadi setelah digunakan pada proses belajar mengajar dan pembuatan suku cadang selama 20 tahun serta untuk mengetahui kelayakan mesin bubut jika digunakan untuk memproses benda kerja dengan toleransi ukuran tertentu, maka perlu dilakukan pengujian. Pengujian yang di lakukan adalah pengujian geometrik mesin pada kebulatan benda kerja.. Hasil proses pemotongan benda uji akan di ukur kebulatannya dianalisis dengan cara lingkaran daerah minimum. Ketiga mesin bubut geminis mempunyai rata-rata penyimpangan sebesar 45,33 μm dan penyimpangan terkecil rata rata 20 μm dapat memproduksi benda kerja dengan toleransi diatas 41 μm.
RANCANG BANGUN PURWARUPA TEKNOLOGI MIKROHIDRO MENGGUNAKAN KONSEP HIDRO FLUTTER
Authors: Rahtika I P G Sopan , Suarta I Made , Sunu Putu Wijaya
Published: August 2020

Menurunnya cadangan minyak dunia menjadi krisis global untuk beberapa dasawarsa ke depan. Pencarian alternatif energi terbaharui menjadi topik urgen tren penelitian saat ini. Indonesia memiliki keberlimpahan ketersediaan energi berupa potensi pengembangan mikrohidro. Penelitian ini merupakan penelitian pengembangan teknologi inovatif baru dalam teknologi mikrohidro berupa teknik pengkonversian energi aliran air menjadi energi listrik menggunakan teknologi hidro flutter. Dalam penelitian ini dilakukan pengembangan alat baru pengkonversian energi dari aliran air menjadi energi listrik. Sebuah purwarupa dibangun yang bisa pengekstrak energi dari aliran air di kali menjadi energi mekanik yang siap di konversi menjadi energi listrik menggunakan prinsip hydro flutter dari sebuah flexibly mounted free leading edge cantilevered rigid plate. Keunggulan dari konsep baru yang ditawarkan adalah kesederhanaan dari desain dan kemampuan untuk membersihkan sistem sendiri sehingga mengurangi biaya pemeliharaan.
PENINGKATAN PERPINDAHAN PANAS PADA FAN COIL UNIT (FCU) DENGAN NANOPARTI Al2O3
Authors: Anakottapary Daud S. , Sutarna I N , Sunu Putu Wijaya , Rasta I Made
Published: August 2020

Eksperimental studi pada Fan Coil Unit (FCU) dilakukan untuk menginvestigasi karakteristik perpindahan panas akibat penambahan nanopartikel Al2O3. Tujuan penelitian ini adalah untuk mengungkap fenomena pengaruh nanofluid partikel pada indikator kinerja perpindahan panas. Pada penelitian ini digunakan FCU jenis tube and fin dengan fluida dingin adalah nanofluid Al2O3 dan fluida panas adalah udara. Laju aliran volume fluida dingin 15 lpm dan laju aliran massa fluida panas sebesar 0,48 kg/s. Konsentrasi nanopartikel yang digunakan pada penelitian ini adalah 0,1%. Temperatur udara lingkungan masuk FCU adalah 28±0,50C sedangkan temperatur fluida dingin yang memasuki FCU adalah 19±0,50C. Pada penelitian ini parameter kinerja pada fluida dingin dengan nanopartikel dibandingkan dengan tanpa nanopartikel. Hasil penelitian menunjukan pemakaian nanopartikel pada fluida dingin mampu meningkatkan perpindahan panas pada FCU sebesar 9,2%.
PENALA PARAMETER PID OTOMATIS PADA PENGATUR KECEPATAN MOTOR INDUKSI TIGA FASA
Authors: Toar Handri , Purwanto Era , Oktavianto Hary , Ridwan Ridwan , Rusli Muhammad Rizani
Published: August 2020

PID merupakan salah satu tipe kontroler sederhana, komputasinya ringan dan mudah diimplementasi serta dikenal tangguh menghadapi gangguan terutama dalam menangani sistem linear. Bagaimana jika sistemnya nonlinear. Sementara motor induksi merupakan contoh sistem yang sangat nonlinear. Maka dibutuhkan sebuah kontroler PID yang dapat ditala ulang setiap saat berdasarkan kondisi motor. Untuk itu perlu menyiapkan banyak kumpulan parameter PID yang siap pakai. Proses pengumpulan parameter PID tersebut tentu perlu banyak waktu dan tenaga jika dilakukan secara manual. Penelitian ini menawarkan solusi berupa algoritma penalaan parameter PID otomatis  yang sesuai untuk mengatur kecepatan motor induksi tiga fasa berbasis kontrol vektor untuk menyelesaikan pengumpulan parameter PID tersebut. Setelah divalidasi melalui simulasi menggunakan aplikasi LabVIEW didapatkan respon kecepatan yang cepat tanpa mengalami overshoot ketika kecepatan bertambah dan tidak undershoot ketika kecepatan berkurang
PENGARUH POSISI CENTERBULB BERBENTUK FOIL TERHADAP KOMPONEN HAMBATAN KAPAL IKAN KATAMARAN MV. LAGANBAR
Authors: Iqbal Muhammad , Manik Parlindungan , Hadi Eko Sasmito , Kurniawan Achmad
Published: August 2020

Catamarans are double hull ships which have many advantages over single hull ships with the same displacement. To increase catches, fishermen in Cilacap converted ships from the original single hull with outrigger to double hull (catamaran). Displacement of ships has doubled. But the ship's resistance increased to almost 4 times. To reduce the resistance of catamarans, some researchers use the concept of center bulb. In this study, the center bulb form used foil. The purpose of this study was to determine the effect of center bulb position on ship resistance components by comparing 9 center bulb positions. The results stated that of the nine center bulb position configurations, Model 6 is the best model because at Fr 0.35 it can reduce ship resistance by up to 33%. For the viscous resistance component it is not significantly affected by the use of the center bulb. But on the wave resistance component, the use of this center bulb can reduce wave resistance by 47% at Fr 0.35.
Dimensões formativas decorrentes da congada em lambari/mg: entre experiência, saberes e ancestralidade
Authors: Guerra da Costa Aline , Pinto Gonçalves dos Reis Fabio , Nascimento Monteiro Lívia , Tüxen Carneiro Kleber
Published: August 2020

Trata-se de um artigo cujo teor retrata uma investigação científica, relativa aos aspectos formativos (relação entre ensino e aprendizado) contidos na Congada. No plano epistemológico, situamo-la como um fenômeno histórico, originalmente de matriz africana (banta, marcada pelo apreço à ancestralidade e o sagrado), que sofreu ressignificações ao se entremear com a cultura brasileira, expressada por aqueles que aqui se tornaram escravizados, que por sua vez se interligou à religião “oficial” do país, o catolicismo, sendo essa uma estratégia de sobrevivência e reinvenção. Em termos metodológicos a pesquisa se assentou sob os pressupostos qualitativos, com um desenho narrativo. Empregou três recursos para erigir os dados: observação participante; elaboração de um diário de campo e entrevistas semiestruturadas. Quanto ao lócus investigativo, tratou-se do município de Lambari/MG. Participaram do estudo oito depoentes, tendo sido eleitos em razão da influência e representação que desfrutam no espaço congadeiro da localidade, assim como em razão da atípica variedade de gênero que se encontrou na capitania deste universo festivo cultural. No que concerne aos resultados, verificou-se a existência do ensino, se bem que com certa mudança na acepção, aproximando-se mais de uma perspectiva interacionista, do que da tradicional transmissibilidade oral, essencialmente empirista. De igual modo, constatou-se que houve modificações no modo de ensinar e aprender os saberes congadeiros, aos novos aprendizes, que, apesar de alguns aspectos intuitivos no modo de aprender, tem suscitado preocupação o desinteresse em relação aos saberes (tradicionais) atinentes à congada, sob pena da descontinuidade da propagação desse patrimônio cultural (imaterial) da humanidade.
Educação da audição e valores estéticos na filosofia da nova música de Theodor Adorno
Authors: Alan Barcelos Ribeiro  , Betlinski Carlos
Published: August 2020

O artigo trata da “Filosofia da Nova Música” de Theodor Adorno e tem como problema de investigação saber quais são os valores estéticos apresentados pelo autor para identificar Schoenberg como o representante do progresso musical. Como objetivos específicos para esse trabalho foram definidos: a identificação das principais características estéticas nas obras musicais de Stravinsky e de Schoenberg e apontar alguns fundamentos filosóficos para diferenciar progresso e regressão na estética musical de Adorno. Ao caracterizar sua concepção estética como filosofia da arte, Adorno toma a produção e a recepção como expressões de uma relação dialética com o meio social e tece críticas especialmente a indústria cultural e a arte burguesa que tinham como propósito agradar o ouvido e permitir que os produtores e receptores estabelecessem uma relação de troca no mercado capitalista. Por isso, sua estética está assentada na crítica e na possibilidade de criação dissonante e autônoma, análises que foram realizadas no âmbito desta investigação que tem como foco a questão da música enquanto objeto estético de progresso ou regressão da audição.
Analisis Strategi Pengelolaan Wakaf Uang di Indonesia (Pendekatan Metode Delphi)
Authors: Tanjung Hendri , Suhandi Tjetjep , Tanzila Widdy
Published: August 2020

Potential cash waqf in Indonesia is enormous. However, the fact that management of waqf money is still encountering many obstacles. This study tried to identify priority constraints become a bottleneck in the management of cash waqf in Indonesia, following the priority solution that can be offered in support of the management of cash waqf in Indonesia with the approach of the Delphi method. Delphi method is a systematic method of collecting opinions from a group of expert withdrawal through a series of questionnaires based linkert scale. Based on the analysis of Delphi that rank highest priority constraint is the lack of public understanding of the waqf money followed by lack of public awareness to be charitable. The results of the analysis of Delphi that ranked highest strategic priorities with the acquisition of the average value of the same magnitude, there are three criteria, namely to provide effective education and outreach to the community about cash waqf, an innovative marketing strategy of waqf institutions, as well as the transparency and accountability of waqf institutions. It is expected that the joint commitment of various parties, academics, practitioners and policymakers in boosting cash waqf management efforts in Indonesia
Pengaruh Karakteristik Dewan Pengawas Syari’ah dan Ukuran Dewan Komisaris terhadap Pengungkapan Islamic Social Reporting
Authors: Setiawan Firman
Published: August 2020

This study aims to determine the effect of Shari'ah Supervisory Board Characteristics (DPS Size, DPS Education Level, and DPS Expertise) and Board of Commissioners Size on Islamic Social Reporting (ISR) Disclosure at Shari'ah Commercial Banks in 2018. Population in this study is a Sharia Commercial Bank in Indonesia in 2018. Data is obtained from the bank's annual report. The data is presented and analyzed quantitatively using multiple linear regression. Based on the analysis conducted, it is known that the Shari'ah Supervisory Board Size, Shari'ah Supervisory Board Education Level and the Shari'ah Supervisory Board Expertise partially have no significant effect on Islamic Social Reporting (ISR) Disclosure, while the Size of the Board of Commissioners has a significant effect on Islamic Social Reporting (ISR) Disclosures. Simultaneously, DPS Characteristics and Board of Commissioners Size significantly influence Islamic Social Reporting (ISR) Disclosure.
Pengaruh Kompetensi Sumber Daya Manusia Terhadap Tingkat Loyalitas Nasabah
Authors: Akeda Rahmawati , Masykur Harun , Cahyani Regita
Published: August 2020

This research aims to data This research aims to determine whether the influence of human resources competence on the level of customer loyalty in the BPRS Harta Insan Karimah branch Karawaci. This type of research is field research with a quantitative approach with 40 respondents. Data that is used is the result of the processing of answers respondents to the questionnaire that was shared by researchers to customers of PT. BPRS Harta Insan Karimah branch Karawaci. The results of this study concluded that the competency of human resources has a positive effect on the level of customer loyalty, as the test result obtained by t Account of 4.886 is greater than the This IE 2.024 (4.886 > 2.024). Based on the test T shows a significant result of 0.000 < 0.05 which means that human resource competence significantly affects the level of customer loyalty. Based on the results the correlation coefficient indicates a strong and positive relationship between the two variables and the result of the coefficient of determination can be known that independent variables describe the dependent variable by 38.6%.
KEMERDEKAAN
Authors: Harahap Ramli
Published: August 2020

Dalam teks yang kita baca dalam kotbah Minggu ini, kita akan membahas kemerdekaan budak Ibrani. Kemerdekaan budak Ibrani ini pastilah berbeda dengan kemerdekaan RI yang kita alami. Latarbelakang sejarah kedua bangsa ini berbeda bentuk dan waktunya tetapi sama isinya. Israel dijadikan budak di rumah orang, sementara di Indonesia dijadikan budak di rumah sendiri. Israel dijajah dan diperah Mesir, Indonesia dijajah oleh Belanda dan Portugis. Keduanya berjuang membebaskan dan memerdekakan diri dari keadaan tersebut. Israel dipimpin oleh duet Musa-Harun, Indonesia oleh Soekarno-Hatta. Dalam perjuangan pembebasan (merebut kemerdekaan), kedua bangsa itu sampai menyimpulkan, bahwa ALLAH turut bekerja mendatangkan keselamatan bagi bangsa tertindas. Pengakuan itu dirumuskan dalam alinea III Mukadimah UUD 1945 dan Mukadimah Hukum Israel (Kel. 20:2; bnd. Ul. 5:6). Dengan demikian Bangsa Israel maupun Bangsa Indonesia mengakui menjunjung tinggi ke-Allah-an TUHAN yang bekerja membebaskan/memerdekakan semua orang dari segala bentuk penjajahan.
Induction of NLR genes in coronavirus infections.
Authors: Mamoor Shahan
Published: August 2020

Nearly 20,000,000 people worldwide have now been infected with the novel Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) (1, 2). We mined published microarray data to identify genes of the inflammasome system whose expression was modulated by coronavirus infection in vivo and in vitro (3-8). We observed unique and shared induction or repression of NLR genes by coronaviruses including SARS-CoV-1, Middle East Respiratory Syndrome (MERS)-CoV, and human coronavirus 229E (HCoV-229E). MERS-CoV infections resulted in differential expression of NLRX1 while SARS-CoV-1 infections resulted in differential expression of NLRC5 in the lung. Both of these NLR proteins function as negative regulators of downstream inflammasome signaling (9-13). These data reveal unique modulation of innate immune pattern recognition receptor gene expression during coronavirus infections.