bluuebunny/crossref_metadata_2025 huggingface dataset:
Combination of tucatinib and neural stem cells secreting anti-HER2 antibody prolongs survival of mice with metastatic brain cancer
Authors: Cordero Alex , Ramsey Matthew D. , Kanojia Deepak , Fares Jawad , Petrosyan Edgar , Schwartz Charles W. , Burga Rachel , Zhang Peng , Rashidi Aida , Castro Brandyn , Xiao Ting , Lee-Chang Catalina , Miska Jason , Balyasnikova Irina V. , Ahmed Atique U. , Lesniak Maciej S.
Published: December 2021

Significance

Brain metastases are among the most severe complications of systemic breast cancer, and overexpression of the human epidermal growth factor receptor 2 (HER2) in breast cancer cells increases the incidence of brain metastases in patients. In this study, we engineered the human-derived, tumor cell tropic neural stem cells LM-NSC008 (LM008) to continuously secrete antibodies against HER2. These anti-HER2 antibodies impaired tumor cell proliferation by inhibiting the PI3K-Akt signaling pathway in HER2+ breast cancer cells in vitro. Importantly, our results demonstrate that the therapeutic combinatorial regimen consisting of LM-NSC008 anti-HER2 antibody-secreting cells and the HER2 kinase inhibitor tucatinib provide therapeutic benefit and prolong survival in preclinical models of HER2+ breast cancer brain metastases.
Columnar-structured thermal barrier coatings deposited via the water-based suspension plasma spray process
Authors: Xu Pengyun , Meng Guohui , Liu Guijie , Coyle Thomas , Pershin Larry , Mostaghimi Javad
Published: December 2021

Suspension plasma spray (SPS) has been developed as a rapid, facile and cost-effective process to deposit columnar-structured thermal barrier coatings (TBCs). In contrast to the most commonly used ethanol-based suspensions, water-based suspensions have not been used in the SPS process to deposit columnar-structured TBCs due to their high surface tension, although they are much cheaper and safer. In this work, a new water-based SPS process was prepared by adding surfactant to lower the surface tension. The optimum content of dispersant and surfactant added to the suspension was determined via measurements of viscosity, particle size, surface tension, contact angles, and atomized droplet size. Coatings deposited using suspensions with and without surfactant showed typical columnar-structured microstructures and vertically cracked microstructures, respectively. The coatings deposited using suspensions with surfactant also showed evolution from columnar-structured microstructures to mixed microstructures of columns and cracks, and to homogeneous microstructures with the increase in standoff distance. The formation of different coating microstructures was correlated to the size of droplets after aerodynamic breakup and the Stokes number of in-flight particles. The new water-based suspension together with the water-based SPS process show great potential to be a cheap and effective alternative to the ethanol-based SPS process.
A nanosecond pulsed discharge circuit model for engine applications
Authors: Gururajan Vyaas , Scarcelli Riccardo
Published: December 2021

Non-equilibrium plasma discharges in spark gaps have been an increasingly studied method for alleviating cycle to cycle variation in lean and dilute combustion environments. However, ignition models that account for streamer propagation, cathode fall, and transmission line amplification over nanosecond time scales have so far not been developed. The present study develops such a model, with emphasis on the energy delivered from circuit to cylinder. Key pieces of the relevant physics and chemistry are summarized, simplified, and systematically coupled to one another. The set of parameters is limited to a handful of key observables and modeled using Modelica. Results show non-trivial behavior in the energy delivery characteristics of such discharges with important implications for ignition.
Low-cost and easily replicable apparatus: an Arduino controlled device for educational activities focused on measuring Brewster’s angle
Authors: Jesus Guilherme C C , Castro Tiago J
Published: December 2021

In this work, we report the development of a low-cost Arduino-controlled device for didactic activities in light polarization. The main body of the prototype was designed and produced using laser-cut medium density fibreboard parts, including gears and pulleys. As a light source and detector, a 532 nm laser pointer and a light dependent resistor were used, respectively. The moving parts (light source and detector) are controlled using a stepper motor (28BYJ-48) with the ULN2003 driver. The apparatus was tested with glass and plastic (polystyrene) slides. The results show that the prototype can distinguish between parallel and perpendicular polarization (to the plane of incidence). In addition, it is demonstrated that the prototype can be satisfactorily applied to determine the Brewster’s angle, even for solids with close refractive indexes.
Application of a Space-based Optical Interferometer Toward Measuring Cosmological Distances of Quasars
Authors: Huang Ying-Ke , Fang Yue-Dong , Lu Kai-Xing , Zhang Zhi-Xiang , Liu Ji-Lin , Li Sha-sha , Luo Bao-Rui , Lin Qin , Huo Zhuo-Xi
Published: December 2021

Measuring quasar distance through joint analysis of spectroastrometry and reverberation mapping observations is a new method for driving the development of cosmology. In this paper, we carry out detailed simulation and analysis to study the effect of four basic observational parameters (baseline length, exposure time, equivalent diameter and spectral resolution) on the data quality of differential phase curves (DPCs), and furthermore on the accuracy of distance measurement. In our simulation, we adopt an axisymmetrical disk model of a broad line region (BLR) to generate differential phase signals. We find that the differential phases and their Poisson errors could be amplified by extending the baseline, while the influence of optical path difference errors can be reduced during fitting the BLR model. Longer exposure time or larger equivalent diameter helps reduce the absolute Poisson error. Therefore, the relative error of DPCs could be reduced by increasing any of the above three parameters, then the accuracy of distance measurement could be improved. In contrast, the uncertainty of absolute angular distances (D
A) could be improved with higher spectral resolution, although the relative error of DPCs would be amplified. We show how the uncertainty of distance measurement varies with the relative error of DPCs. For our specific set of model parameters, without considering more complicated structures and kinematics of BLRs in our simulation, it is found that the relative error of DPCs < 20% is a limit for accurate distance measurement. The relative error of DPCs has a lower limit (roughly 5%) and the uncertainty in distance measurement can be better than 2%.
Disc damage likelihood scale recognition for Glaucoma detection
Authors: Mohammed F. G. , Athab S.D. , Mohammed S. G.
Published: December 2021

Glaucoma is a visual disorder, which is one of the significant driving reason for visual impairment. Glaucoma leads to frustrate the visual information transmission to the brain. Dissimilar to other eye illness such as myopia and cataracts. The impact of glaucoma can’t be cured; The Disc Damage Likelihood Scale (DDLS) can be used to assess the Glaucoma. The proposed methodology suggested simple method to extract Neuroretinal rim (NRM) region then dividing the region into four sectors after that calculate the width for each sector and select the minimum value to use it in DDLS factor. The feature was fed to the SVM classification algorithm, the DDLS successfully classified Glaucoma disease with 70% percentage; moreover, when the dimensions of both Optic Disc(OD) and Optic Cup(OC) were used as additional features the accuracy rate raised to 91%.
Influence Metal Berylliumof the Optical FiberCoreon plasmonic Properties
Authors: John Hussein Taqi
Published: December 2021

The paper include, the properties of the plasmonic optical fiber in which the core is beryllium metal were studied, were we studied the effect of this metal on the plasmonic fiber, and a mathematical program was used which is COMSOL MULTIPHYSICS, which depends on the finite element method (FEM) to deduce the first three modes and the effective refractive index, neff
accompanying each wavelength. It was observed that when order the mode is increased, the lobes will increase, where the mode, LP
01 is one spot and the mode, LP11
are two spots and the mode, LP21
are four spots. An increase in the power indicator is increase red and yellow, and this applies to all modes. That is, by controlling the radius of the fiber core and the wavelength, it is possible to equilibrium the power ratio that propagates forward and backward.

The neff
, attenuation coefficient and propagation constant for different wavelengths and core radii for the first three modes were also studied. In all cases, we got the higher values when the wavelengths are small the value, and then these values begin to reduction at increasing wavelength.
Monitoring Land Change of Cover in Al-Rusafa District In Baghdad City by using Remote Sensing and GIS Techniques
Authors: Hamdi Halah Qahtan , Abdul-Ameer Zehraa Najim
Published: December 2021

Change detection of land surface is critical to execute precise data about territory of study for any sorts of arranging improvement. Technologies of Remote Sensing and GIS and have accomplished incredible strides to tackle the investigation issues like changes of land cover. The point of that study is to deliver guides of land front of Al-Rusafa District on year 2000, 2018 to screen the potential the expectable changes especially in vegetation land and metropolitan or built land, furthermore, identify the cycle of city settlement. Two multi-transient satellite picture information, Upgraded Topical Mapper picture information from 2000 and OLI Satellite picture information from 2018 were utilized in that task. That study direction is the major approach of classification approach to supply divided maps, and cover of land categories were recognized and map. Spectral indices (NDVI, NDBI, NDWI) utilized to identify the changes of expanding and diminishing land the change detection in (Arc Map 10.5 ) Envision was utilized to identify the urban development and the concentrated alters encompassing the urban regions. Cellular automata of Markov was utilized to mimic the patterns of land utilize and change of cover the period of 2000 to 2018 cross-tabulation lattices between diverse stages were delivered to interpret the patterns of change of covers from one cover land to another, these measurement information straight forwardly regions communicated the alter of land cover. The results about appear these demonstrate that around (31.8 %) of Change from one Kind of land cover to another one though around (68.2 %) of the region Remained unaltered between (2000, and 2018)..
Thyroglobulin titration and hazard components at follow-up Patients with thyroid cancer
Authors: Jary Aqeel Maryoosh , Atiyah Sadeq Naeem , Abbood Nazar Ali , Alhamd M. W.
Published: December 2021

The comes about of the total body scintigraphy filter with iodine-131 and the comes about of thyroid globulin titration were surveyed in 90 patients with separated thyroid cancer and with their follow-up after treatment. Amid the follow-up, backslides were watched in 12 cases, 8 cases (3 cases: ordinary thyroid globulin, 5 cases: tall thyroid gobolin) analyzed by scintigraphy filter and 5 cases with tall thyroid globulin level and the scintigraphy scan negative and backslide was analyzed with the assistance of radiography or ultrasound. Of the 24 cases who gotten sparkle filters demonstrating doubt of repeat, 6 cases were repetitive, whereas as it were 2 of the 63 routinely performed cases were found. It was watched that 10 of the 12 patients who had a backslide were from the tall hazard gather. When considering the typical upper constrain for thyroglobulin 10ng/ml, 3 untrue negative cases were found among patients with backslides, and the number diminished to 1 on the off chance that the upper restrain was considered 5ng/ml. In.
A comparison and classification of land use land cover to estimate their effect on environment: case study in Baghdad city
Authors: Ahmed Bushra A. , Hadi Ghaida S.
Published: December 2021

This study compared and classified of land use and land cover changes by using Remote Sensing (RS) and Geographic Information Systems (GIS) on two cities (Al-Saydiya city and Al-Hurriya) in Baghdad province, capital of Iraq. In this study, Landsat satellite image for 2020 were used for (Land Use/Land Cover) classification. The change in the size of the surface area of each class in the Al-Saydiya city and Al-Hurriya cities was also calculated to estimate their effect on environment. The major change identified, in the study, was in agricultural area in Al-Saydiya city compare with Al-Hurriya city in Baghdad province. The results of the research showed that the percentage of the green area from the total area in Al-Saydiya city is 34.95%, while in Al-Hurriya is 27.53%. Therefore, available results of land use and land cover changes can provide critical input to decision-making of environmental management and planning the future.
Using of metakaolin to produce colored geopolymer concrete
Authors: Mohammed Hameed M , Mohammed Ali A
Published: December 2021

This study was related to produce colored geopolymer concrete using metakaolin and adding two types of red (iron oxide) and green (chromium oxide) pigments with three additional ratios for each of the listed colors (0, 2, 4, 6 )% wt of metakaolin, and study some mechanical properties of colored geopolymer concrete. The experimental investigation has dealt with the fresh properties(slump) of the colored geopolymer concrete mixes as well as some of the mechanical properties of the hardened concrete by testing specimens in compressive strength, modulus of rupture, Rebound number (RN), and ultrasonic pulse velocity (UPV). Show us that (2% wt) pigment percentage gives the best results.
photonic cloning of seas and oceans
Authors: A’assam Adi Al , Ahamd M.W.
Published: December 2021

When studying the water reality and calculating the increase in the quantities of water per year, we find that there is another way to increase the percentage of water, and that is through optical reproduction. For a detailed explanation of the location of water on Earth, see the map and the data table shown below. Note that the world’s add up to water supply is almost 1.387 million cubic kilometers (332.6 cubic miles) of wate, of which more than 96% is salt water. As for fresh water, more than 96% are trapped by rivers and glaciers, and 30% are on the ground. As for the freshwater resources represented in rivers and lakes, they constitute about 93,100 cubic kilometers (22,300 cubic miles), which is about 1/150 of 1% of the total water. Rivers and lakes still make up most of the water sources that people use daily. The amount of water stored in the oceans for long periods is much more than that which moves through the water cycle. The total water supply worldwide is 1,386,000,000 cubic kilometers (321,000,000 cubic miles), of which 1,338,0, 000 cubic kilometers (332,500,000 cubic miles) are stored in the oceans at a rate of 95%, as the oceans give almost 90% of the water. Dissipated that goes to the water cycle. The photonic cloning resulting by the sun contributes to the consistency of water level. Indeed, the consistency of ocean water depends not only on the natural cycle of evaporation process of those waters to return to the oceans again, but also on the photonic cloning resulting by the sun, as experiment has vividly shown.
Dual-band Rectangular Microstrip Patch Antenna for WiMAX Wireless Communications by Chemical Method
Authors: Khidhir Ali H.
Published: December 2021

The rectangular microstrip patch antenna (RMPA) had designed and manufactured to operate in two working areas of the worldwide interoperability for microwave access (WiMAX) communication system. Flame retardant (FR-4) material had used for implementation, and the total antenna size was 57.22 × 1.6 mm3. The chemical method was used to implement the RMPA. The proposed antenna is capable of working at frequencies 2.51 GHz and 3.87 GHz experimentally. The results were -21.62 dB of return loss, and 50 MHz of bandwidth for the first frequency. Also, for second frequency was -20.01 dB of return loss, and 80 MHz of bandwidth.
Photodetector based on Rutile and Anatase TiO2nanostructures/n-Si Heterojunction
Authors: Hamdan S A , Ibrahim I M , Ali I M
Published: December 2021

Rutile and anatase titanium dioxide TiO2nanostructures has been prepared successfully by hydrothermal technique. Also Rutile and anatase TiO2/n-Si heterojunction detector (HJ) has been fabricated. Hall Effect measurements confirmed that prepared films are n-type. The optical absorption spectra showed the prepared films have peak absorption in UV region. TiO2/n-Si heterojunction had exhibited diode-like rectifying I-V behaviour in the dark as well as under the illumination. Ideality factor greater than 2 and rectification factor for Rutile TiO2/n-Si HJ is equal 32.0961 higher than anatase TiO2/n-Si HJ. Photodetetor based on rutile TiO2/n-Si HJ showed higher responsivity and incident photon-to-current efficiency (IPCE) than photodetector based on anatase TiO2/n-Si HJ. Photodetetor based on rutile TiO2/n-Si HJ has responsivity is 69.11Amp/W at 570 nm and IPCE is 21.2%at 370nm and 1.38% at 570nm. For the purpose of investigating the impacts of TiO2crystal phase upon the performance of the device despite the fact that rutile has a lower band gap compared to anatase, rutile exhibits better photovoltaic activity due to its higher specific surface area.
Influence of Gas Type on the Laser Produced Graphite Plasma
Authors: Alazawi H Adil A , Adnan Abass Q
Published: December 2021

Plasma graphite creation by a pulsed Nd: YAG laser with a wavelength of 1064nm to a target in vacuum in two cases (Argon, Air) with varied gas pressures and the resulting spectrum was diagnosed using optical emission spectroscopy for the wavelength range 320-740nm electron temperature Te
and electron density ne
Debye lengthλD
, and plasma frequency f p were calculated. The results showed that increasing the pulse laser energy causes all plasma parameters of both gases under study to increase, as well as a rise in the emission line intensity. The ionization energy of target atoms determines the presence of an element’s atomic and ionic emission lines in the emission spectrum, increase in pressure decreases the electron temperature, and Debye length, also plasma frequency and electron density increase, as it has been proven that the type of gas does not affect the properties of plasma.
Blended PVA/PVP Electro spun nanofibers for Coating Application
Authors: Mohammed R , Jawad H , Al-Zubiedy A.
Published: December 2021

The use of polymeric blended nanofibres is one of the recent applications in the food and liquid packaging. The current research aims to prepare the nanofibers coatings from the blend of polymeric materials via the electro spinning technique 0.08 weight ratio concentration of polyvinyl alcohol (PVA) dissolved in water, as well as, (0.2 weight ratio concentration ) of poly vinyl pyrrolidone (PVP) were used to obtain different volume proportions of (PVA:PVP) solutions include (100:0, 80:20,70:30, 50:50, 20:80, and 0:100). The electro spinning system was organized with pumping conditions (20 kV for the applied voltage, 20 cm pumping distance, 1ml/hr pumping rate) and a needle diameter with 0.4mm diameter. The properties of the polymeric solutions involve (viscosity, surface tension, and electrical conductivity of the liquid) were examined. A scanning electron microscope technique was used to study the surface properties of the prepared films, and the contact angle via the contact angle analyzer was examined. The results of a scanning electron microscope proved that the diameter of the nano fibers increases with increasing the concentration and viscosity of solutions and decreasing its electrical conductivity. Also, the results of the contact angle analyzer showed an increase the hydrophilic property via increasing percentage of polyvinylpyrrolidone.
Nano Gold Spheres and Rods: Synthesis and Characterization
Authors: Ali Saif M. , Al-Karam Logean Qadri
Published: December 2021

The present study aims to synthesised nano gold with chemical method with two shape sphere and rod with multi diameter and aspect ratio and then characterize the synthesised material with Atomic Force Microscope (AFM), Transmission Electron Microscope (TEM) and Ultraviolet-visible (UV–Visible ) spectrophotometer. The AFM and TEM characterization result of three samples for each sphere and rods show that the synthesised material are in nano range with diameter 31.9 nm, 36.19 nm and 79.37 nm respectively for nano sphere and diameters 39.9nm, 36.05 nm and 28 nm respectively for nano-rods samples and the UV-Visible spectrophotometer show that peak of surface plasmon resonance of nano-sphere are at wavelengths 532 nm, 535 nm and 546 nm and all are in the visible range and nano-rod have two peaks one in the visible range at wavelengths 525nm,518nm and 531nm and the other peak is in the near infrared range at wavelengths 633nm, 680nm and 875 nm respectively.
Improve X-ray images using quality assurance tests
Authors: Alhamd M. W. , Jary Aqeel Maryoosh , Atiyah Sadeq Naeem , Abbood Nazar Ali
Published: December 2021

In this research, entrance surface doses of patients which are resulted from a classical radiograph in most widespread tests (Chest, skull, abdomen, limbs, …) have been measured with selected instruments in (Specialized surgeries hospital) and one of the private clinic in Baghdad, the instruments are of various origins and different make date. A group of patients (10 patients) for each test and according the average of the resulted doses. Comparison of the patient’s doses, in this research, has been close with the reliable International standards and it has been found that radiological doses are bigger than reference doses ranging (132–1.79) in most of the appliance and the range doses to one whenever the instrument is new and the radiographer has good experience, this increase relates to several functions discussed in the research in detail For the importance of the quality assurance of x-ray instruments, three tests have been performed by three of the instruments only, and these tests are :

Beam Alignment test : The Beam Alignment was measured and the x-ray radiograph was found symmetrical round the two axes of the instruments (A, B) but it is about 3 ° away from the vertical axis of the instrument (C).

Optical and Radiation Field Congruence Test: The light field coincides with the radiative field in a and b and their mismatch in c.

Focal Spot Size Test: The radiation focus area was measured by the star tool and what appeared is that the focus of the x-ray instrument (C) is smaller than the international standards on the contrary of the focus area of the x-ray instrument (E) which is identical with the international standards.

From these results reached is that the instruments (A, B) have passed quality assurance tests and they are suitable for work in the present, but the instrument (C) has not passed most of the quality assurance tests, so this instrument should not be used for medical tests This in research is considered the first one for these instruments to evaluate their doses or measure a quality assurance.
Synthesis and Characterization of Dextran coated Iron Oxide Nanoparticles as a T1 Contrast Agent
Authors: Ra’ad Z , Al-Karam L Q , Abid Alsahib N K
Published: December 2021

This is a second part of iron oxide nanoparticles synthesis by co-precipitation method with various PH values. This study includes stabilizing iron oxide nanoparticles with dextran of molecular weight 10000 Da by aqueous route, then study its characteristics with AFM, FTIR and VSM also using the stabilized material as a contrast agent in T1-weighted image then compare the contrast enhancement with gadolinium based commercially available contrast agent (MagnevistTM). Ph values were (7,11,14), all samples were injected to mice bodies then imaged with MRI best result of T1 contrast enhancement was obtained from sample with Ph 14 compared with gadolinium-based T1 contrast agent with no toxic effects.
Non-covalent functionalization of CNTs with Chitosan for drug delivery system
Authors: Magid Mayssam , Al-Karam Logean Qadri
Published: December 2021

Nanotechnology of drug delivery is a new topic aimed at delivering medications to the desired places, such as tumor tissues, while reducing the chemotherapeutic drug adverse effects on adjacent tissues. A new form of nanomaterial has been discovered, which expands the possibilities for drug delivery systems. The carbon nanotube (CNT) is a novel type of synthetic material that has shown great potential for targeted delivery of anti-cancer drug agents. The initial problem for biomedical applications of CNT has been its hydrophobicity. A major stage in the biomedical application of CNT is proper surface modification or CNT functionalization, in order to prepare well-dispersed and biocompatible CNT in biological fluids.

The goul of this study is to noncovalently functionalize of multi-walled carbon nanotubes conjugated with chitosan in various concentrations for the delivery of the chemotherapy drug paclitaxel (PTX) to breast cancer cell line. After that, characterize and investigate in vitro cell cytotoxicity of f-CNTs with and without Paclitaxel (PTX). The chitosan conjugate was synthesized and the conjugation was confirmed using Fourier transform infrared spectroscopy. The average diameter of MWCNT is 42.27 nm and the MWCNT/CHI is 48.48 nm. MWCNT exhibit stability in polymeric system (CHI) based formulation in terms of greater ζ-potential values with f-CNTs, higher entrapment efficiency was achieved with a maximum efficiency of 200 μg/ml.

MDA-MB-231 cell line was exploited for cytotoxicity evaluations. MWCNT and MWCNT/CHI in different concentrations demonstrated insignificant cytotoxic effects on MDA-MB-231cell line. Nevertheless, at lower Paclitaxel concentration (100μg/ml), fMWCNTs with PTX demonstrated a considerable reduction in cell viability.
Study of the properties of MgO/Poly methyl methacrylate Nano-composites
Authors: Aldabbagh B , Jawad H , Mahdi R
Published: December 2021

Nanotechnology applications have recently developed in the field of smart sensors that convert energy from one form to another. Nanotechnology is one important source to renewable energy applications, such as the use of solar energy to generate electrical energy A concentration of 0.2 w/v of poly methyl meta acrylic dissolved in dimethylformamide was prepared using hot plate magnetic stirrer magnetic with a temperature up to 50 ° C, and the mixing continued for an hour. 0.02 Percentage of magnesium oxide nanoparticles was added to (poly methyl methacrylate/dimethylformamide) solution and dispersed by ultrasonic dispersion device. The samples were cast into glass containers to obtain thin films with 0.02 mm diameter after drying for 24 hours.

Infrared assays were conducted to study the interactions between the polymer and the nanoparticles via studying the nature of the bonds. The differential scanning calorimetry test was performed to measure the thermal properties of the samples. Atomic force microscopy was used to study the surface properties of the samples. The energy gap of samples was calculated. The results proved that the interaction between polymer and nanoparticles is physical interaction. The differential thermal calorimeter results also showed that the adding of MgO nanoparticles leads to increase the glass transition temperature by a small value from (80 °C) to (82 °C). On the other hand, the softening point decreases from (132 ° C) to (120 ° C) and melting point decreases from (173 ° C) to (135 ° C) after adding nanoparticles.

As for the results of atomic force microscopy, it was proved that the surface roughness decreases from (2.08 nm) to (1.7 nm) after adding nanoparticles, while the bearing index increases from (0.369) to (0.582). Also, the results of the energy gap proved that the addition of nanoparticles leads to decrease in the energy gap from (4.3 – 4.1) eV, which leads to increase in electrical sensitivity.
Synthesis, Characterization, and NH3Sensing Properties of (Zn0.7Mn0.3-xCexFe2O4) Nano-Ferrite
Authors: Saheb Laith , Al-Saadi Tagreed M.
Published: December 2021

This study includes the preparation of novel nano ferrite (Zn0.7Mn0.3-xCexFe2O4) by using the auto combustion technique. For the following molar values, the percentage x was calculated: 0.0, 0.05, 0.1, 0.15, 0.2, 0.25, and 0.3. The nano-ferrite was calcined for 2 hours at 500°C. The energy dispersive x-ray spectroscopy (EDX), X-ray diffraction (XRD) and field emission scanning electron microscopy FE-SEM was used to examine structural, morphological, and sensing properties. The spinel cubic structure was revealed by XRD findings. The particle distribution was shown to contain voids by FE-SEM. The testing of sensing characteristics to NH3 gas indicated that the synthesized nano-ferrite has a small response time ranging from (15.3-25.2) s as well as a small recovery time between (36-58.5) s, also has a higher sensitivity of about 72.23%.
The optical properties of C\Mg, nano-rods produced by the explosion wire technique
Authors: Hussein Nada. K. , Kadhem S.J.
Published: December 2021

The aim of this research is to study the optical properties of carbon-magnesium plasma resulting from arc discharge with explosive wire technique, where the energy gap of each of carbon and magnesium and the carbon-magnesium bond for three values of the wire exploding current (50,75,100 amperes) was studied. It was found that the energy gap for each of carbon and magnesium decreases with increasing the current, the X-ray diffraction of magnesium and the carbon-magnesium suspension was studied, and FTIR of the carbon-magnesium suspended carbon was studied for three values of the exploding current (50, 75, 100 amperes) and the type of bonds for carbon and magnesium was determined. To obtain deeper insight about the morphology and size distribution of the nano rods obtained from the explosion of a magnesium strip in a carbon suspension images obtained from transmission electron microscope (TEM) image analysis confirmed that the formed nanomaterial is rod-shaped.
Effect of dielectric barrier discharge on conductive properties for epoxy/copper composite
Authors: Khaleel Sarah Faris , Abbas Qusay Adnan
Published: December 2021

The plasma treatment efficient method used improving and Surface treatment of epoxy and increasing the surface roughness. In this paper, epoxy and epoxy/copper are modified by dielectric barrier discharge (DBD) Plasma in presence of air. Modification of the properties of epoxy by preparing doping systems with percentage 1% copper with two different frequencies of the plasma f=7 and 8 kHz and exposure time t =10 min. The results showed a decrease in the energy gap when exposed to plasma and an increase in the surface roughness of epoxy, electrical conductivity of composites increased with temperature.
Influence of bulk defects in SnS absorber layer on optical and electrical properties of solar cell
Authors: Ahmed Mussab J. , Saleh Ayed N.
Published: December 2021

In this research, the effect of bulk defect on the performance of the solar cell was studied by using the AFORS-HET simulation program. This was done by varying the density of defects including both Acceptor-like and donor-like within the SnS absorption layer. The thickness of the SnS layer was changed from 600nm to 9000nm with the change in bulk defect density in the same layer from (1E10 to 1E17 cm−3). The results showed that when the density of defects is less than 1E14cm−3, it has no effect on the performance of the solar cell, but its effect appears after this concentration, On the contrary, it is the effect of thickness, the results showed that the change in thickness at the defect density of E16cm−3 does not affect on the optical and electrical properties. Also, the results showed that the effect of defects is greatest at low concentrations of Na impurities, and this effect begins to decrease with increasing the concentration of impurities.
Omnidirectional Microstrip Patch Antenna for 2.4 GHz Wireless Communications
Authors: Abdulhussein Alaa M. , Khidhi Ali H. , Naser Ahmed A.
Published: December 2021

Antenna studies on various wireless communication systems have been carried out by many academics. In this research, the omnidirectional microstrip patch antenna (MPA) is proposed, manufactured, and tested. The operating bandwidth of the antenna is quite suitable for the different applications. The proposed antenna fabricated on the flame retardant (FR-4) substrate with a volume of 75.85 × 57.23 × 1.59 mm3. Computer simulation technology (CST) studio used to design and simulate. Experimental results show that the return loss (RL), bandwidth (BW), voltage standing wave ratio (VSWR) and input impedance (Zin) are -25.26 dB, 61 MHz, 1.12 and 54.46 Ω, respectively. The antenna operates at 2.42 GHz (from 2.39 to 2.45 GHz), which has good performance in the Wi-Fi, Bluetooth, and ZigBee communications.
Tapered coated coreless optical fiber pollution sensor
Authors: Ali B Sura , Al – Bassam Soudad S.
Published: December 2021

This project is centered on the design and implementation of a pollution-sensitive optical fiber using a No core optical fiber. The sensors are used for estimating refractive indices and concentrations of various contaminated water (dirty pond water (contains mud and animal excrement), chemically contaminated water, oiled water, drainage water is an environmental pollutant, Sodium chloride water and sucrose water) and distilled water (The refractive index was measured in the laboratory with an Abbe refractometer device) as well as for evaluating the performance parameters such as sensitivity (11.11μm/RIU for tapered sensor 10min and 11.13μm/RIU for tapered sensor 20min) and resolution (0.000069 RIU for tapered No core 10min and 0.000079 RIU for 20min tapered) of sensor (multimode fiber-no core fiber-multimode fiber), with 40 nm thick gold (Au) metal film of the exposed sensing region).
Fabrication and Characterization of Self-Powered Photosensor Based on Nanostructure TiO2/natural Dyes
Authors: Al-Taay H.F.
Published: December 2021

Self-powered photosensor is fabricated based on nanostructure TiO2/natural dyes. TiO2 nanostructured thin film was prepared on FTO/glass substrates by hydrothermal method. Surface morphology, crystalline structure, as well as optical properties of the prepared sample are investigated. Three types of natural dyes, pomegranate, aubergine, and coffee are used as an active layer (absorber) of the fabricated photosensor. However, the solution of dye was casted onto TiO2 and left to dry naturally and carbon/FTO was used as a back contact of the device. Current-voltage (I-V) characteristic under dark and light case was characterized for all prepared sensors. Besides, the fabricated sensors appeared good response to whit light under zero bias voltage. Sensitivity, raise and decay time of the prepared photosensor are calculated.
Analytical Study of the Royal-Jelly Effect on Sperms Morphological Characteristics and some Liver Function Parameters and their Correlation with some Antioxidants in Male Albino Rats Treated with Pregabalin Drug
Authors: Salih L. A. , Nawar M.H. , Muuhsen S. M.
Published: December 2021

In recent years, the consideration of natural products as anti-inflammatory and antioxidative treatments has more interested worldwide. Moreover, natural products are easily obtained and are relatively safe the Royal jelly (RJ) is one of them. The current study was carried to evaluate the effects of pregabalin (PGB) on physiological activity of sperms, reproductive hormones assay and some biochemical analysis. Forty (40) male albino rats (10-weeks-old) were divided into four groups (10 rats each): G1 (treated with PGB drug, 150 mg/kg B.wt (Lyrica-Pfizer-Pharmaceutical Industries), G2 (treated with RJ 1g/kg), G3 (treated with PGB drug and RJ together), and G4 control treated with normal saline only. all groups were treated orally via stomach tube for 60 consecutive days.. PGB caused a significant reduction in sperm count, sperm viability, motility and sperm abnormality percent, serum FSH, LH and testosterone levels, the co-administration of RJ caused normal level of the previous tests near the control group level. Results of the lipid profile and some the present results of the liver function parameters showed increased concentrations in PGB-treated group, but after treated with RJ the levels were recovered to normal level. In the studied antioxidants markers, the results appeared high level in malondialdehyde (MDA) and low level in the antioxidants enzymes; superoxide dismutase (SOD) and catalase (CAT) the RJ was appeared direct effect on MDA and showed decreased concentration of MDA and increased levels in the studied antioxidants enzymes of the PGB group which treated with RJ.
Scanning Electron Microscopy of Metakaolin Based Geopolymer Concrete
Authors: Al-Jaberi Layth , Al-Saraj Al-Saraj K. Wissam , Sahar Al-Serai Al-Serai J.
Published: December 2021

This work is a Scanning Electron Microscope (SEM) study to investigate the behaviour of Metakaolin based GPC mixes with and without cement and containing recycled concrete aggregate. Three (3) GPC mixes and Normal Concrete mix (NC) designed mingled and tested to achieve the goals of this research. Control specimens were cast from each mix to determine the mechanical properties for each mix. (12) SEM micrographs from carefully selected samples. SEM study confirmed that the presence of recycled concrete aggregate can be a source of generating cracks and fissures. The un-hydrated cement particles in recycled aggregate can contribute to further hydration when contact with water. Also, the metakaolin based GPC matrix with natural aggregate showed enormous with unrealized morphology, which indicates amorphous. Finally, the replacement of 20% of Metakaolin with cement led to enhance mechanical properties.
Growth Time Influence on Optical and Electrical Properties of TiO2 Nanorods Prepared via Hydrothermal Method
Authors: Salman Odai N. , Ismail Mukhlis M. , Ali Thamir Hassen
Published: December 2021

On a fluorine doped tin oxide (F: SnO2) coated glass substrate, TiO2 nanorod arrays (NRAs) were produced, successfully generated hydrothermally with an extended period of time (4, 6, 10, 20 and 30 h). Growth time and their effects on, morphological, structural, optical, and electrical characteristics of Titanium dioxide nanorods (NRs) were investigated by, Field Emission Scanning Electron Microscopy, X-ray Diffraction, Fourier Transform Infrared spectroscopy and ultraviolet-visible spectroscopy methods. X-ray diffraction revealed the development of TiO2 nanorods in the tetragonal rutile structure of the produced TiO2 NRs with the maximum (002) peak strength. NRs had a tetragonal shape with square top facets, according to images showed by a Field-Emission Scanning Electron Microscope (FESEM). The range of nanorods’ diameter were detected to be (40.05-225.26) nm, respectively based on FESEM measurements. While Fourier Transform Infrared spectroscopy (FT-IR) showed a wide, band about 2952 cm-1. TiO2 NRs’ optical and electrical characteristics have been investigated. According to optical absorption tests, there was no discernible change in band distance with increasing growth time. For TiO2 nanorods primed with 4, 6, 10, 20 and 30 hours of reaction period, the band gap energy was found to be 3.14, 3.0, 3.12, 3.1, and 3.09 eV. The value of the energy gap reduced as reaction time increased from 4 to 30 hours, then increased as reaction time increased.
Superconductivity of BSCCO Compound Substituted Partially by Zr Nanoparticles at Bi Site
Authors: Jassim A K , Abbas M M
Published: December 2021

High-temperature superconductors with a nominal composition Bi2-
xZrxPb0.4Sr2Ca2Cu3Oy for (0≤x≤0.3) were prepared by solid-state reaction method. Effects of the Zr nanoparticles substitution at Bi sites have been studied to obtain the optimum concentration for the formation and stabilization of the superconducting samples. Electrical resistivity measurements of the samples showed that the higher critical temperature TC was found at 118 K, which is for the composition Bi1.95Zr0.05Pb0.4Sr2Ca2Cu3Oy. Semiconductor behavior noticed for samples with concentration higher than 0.2. The X-ray diffraction results for all superconducting samples showed an orthorhombic structure with two phases, 2223 high-TC phase and 2212 low-TC phase. The scanning electron microscope has been used to identify the morphology of the superconducting phase. The plate-like grains of the high Bi-2223 phase appeared in most samples besides changes in morphology of the samples with increasing dopant concentration
Indoor and Outdoor Fire Localization Using YOLO Algorithm
Authors: Nori Ruba R. , Farhan Rabah N. , Abed Safaa Hussein
Published: December 2021

Novel algorithm for fire detection has been introduced. CNN based System localization of fire for real time applications was proposed. Deep learning algorithms shows excellent results in a way that it accuracy reaches very high accuracy for fire image dataset. Yolo is a superior deep learning algorithm that is capable of detect and localize fires in real time. The luck of image dataset force us to limit the system in binary classification test. Proposed model was tested on dataset gathered from the internet. In this article, we built an automated alert system integrating multiple sensors and state-of-the art deep learning algorithms, which have a limited number of false positive elements and which provide our prototype robot with reasonable accuracy in real-time data and as little as possible to track and record fire events as soon as possible.
Lead-like compounds for inhibiting Methionine amino peptidase 2 (MetAP2)
Authors: AlMasraf Ghaith , Albayati Safanah
Published: December 2021

This research aims to find a new approach to deal with cancer, by targeting a protein that controls the growth and increases the size of the tumour. The approach uses computer-aid drug designed to find the best drug for inhibiting f Methionine Aminopeptidase (Metap2) which is an enzyme that is responsible for starting the synthesis of new protein. The inhibition of the enzyme was found to be crucial in stopping the growth of the tumour and its development. In this research, an in-silico approach was conducted to obtain compounds that are capable of inhibiting the enzyme with non-toxic features. This is done by using Ligand-Based. The Zinc15 and National Institute of Cancer Data (NCI) Databases were screened to attain a variety of manufactured Compounds. Then, molecular docking filtration process was carried out using PyRx, and Autodock4. Finally, SwissADME protocol was used to show the ADMET properties and that compounds can permit the blood barriers and validate better pharmacokinetic properties than the Fumagillin.
Change Detection for Wasit Province’s Land Coverbetween 2013 and 2020
Authors: Shahad Shaimaa H. , Malik Mutasim I. , Al-Dabbagh Hayder A.
Published: December 2021

It is well known that On Earth there are only a few places, which are now intheir natural state and have not been affected by human activity in any way. These human activities lead to significant changes in land use at the regional and local levels. In this research, remote sensing and geographic information systems (GIS) are integrated to monitor, map, and quantify the main land cover types (vegetation, water, soil, bare area, and urban) in Wasit province. The result of supervised classification for two classified Landsat-8 images for 2020, 2013 after combining 13 subclasses: Water area in 2013 (0.719%) increases to (1.521%) in 2020, vegetation class increases from (2.864) to (6.148%). Urban increases from 2.095% to 4.629%, Bare area in 2020 became 24.307% but in 2013 was 29.03% and finally, soil decreased from (15.821%) to (13.922%).
Preparation ofZincOxide Nanoparticles by UV-IrradiationMethod in Two Different Media
Authors: Noori Noor AlhudaMahammed , Mohammed Mahdi A.
Published: December 2021

The zinc oxidenanoparticles(ZnO NPs) were prepared in two media. The first one was in an aqueous medium resulting from the reaction of urea with zinc acetate at 0.3M concentration in both of them in deionized water. The second medium is a polymeric solution which is a dissolving of 4% polyvinyl alcohol (PVA)in deionized water with zinc acetate. The nanoparticles were obtained after the two media were irradiated with ultraviolet rays for 30 min. According to the characterization of the XRD, FESEM, and UV-visible, the polymeric medium gives a less granular size in addition to its ease of use and handling.
Using Spatial Analysis Methods to Evaluate the Soil Contamination of Baghdad City, Iraq
Authors: Hussain Hawra A. , Abdullah Sundus A. , Al Maliki Ali A.
Published: December 2021

The current study aims to identify soil pollutants from heavy metals The study utilized 40 topsoil (5 cm) samples, which adapted and divided into seven regions lies in Baghdad governorate, included (Al-Husainya,(Hs) Al-Doura (Do), Sharie Al-Matar (SM), Al-Waziria (Wz), Nharawan (Nh), Abu Ghraib (Abu) and Al-Mahmoodyia (Mh)). Spatial distribution maps of Nickel (Ni), Manganese (Mn), Lead (Pb) and Zinc (Zn) were created for Baghdad city using Geographic Information Systems (GIS). The concentrations of four heavy metals in the soil of different area of Baghdad were measured and observed using XRF instrument. The result found highest values of Pb and Zn at the middle of the Baghdad in (Wz) area and it reached to 35110 and 720 ppm respectively which exceeded allowed limits values. . While the measurements of the Mn and Ni recorded highest values in (Do) area and reached to 1020 and 170ppm respectively and was within the allowed limits of standard values of soil contamination. The prediction maps of Zn, Pb showed high accumulations in the center and western part of Baghdad city. While the maps of the elements of Mn, Ni showed low accumulations in the eastern and southern part of Baghdad. By using prediction models through which pollution levels can be determination in areas unsampled, which contributes in economic benefits, such as decrease of the required amount of samples in any project, decrease cost of analyzing and using friendly tools. The methodologies incorporated with GIS helps to give a clear picture for decision-makers to take the necessary treatments for polluted areas.
Evaluation of Microwave-Optical-Infrared Satellite Imagery for Land Cover Mapping
Authors: ameer Ghufran , Gazal Nawal Kh.
Published: December 2021

Satellite images are vital tool in various applications like land use, land cover mapping and geographic information system (GIS) etc. A variety of factors involved in the process of image acquisition, introduce geometric distortions, which are removed by pre-processing of the digital imagery. Geometric correction is the process of rectification of geometric errors introduced in the imagery during the process of its acquisition.

From practical point of view, the Sentinel-1 images are to be depended as source of microwave satellite imagery. While, Sentinel-2 are to be used for providing the study with the required visible-infrared images.

The study includes performing different digital image processing and analysis techniques, such as: geometric and radiometric corrections, spatial merge (fusion), feature extraction with using different spatial filtering techniques and spectral classification to reveal which LULC image presents better accuracy results.

The microwave portion of the spectrum covers the range from approximately 1cm to 1m in wavelength. Because of their long wavelengths, compared to the visible and infrared, microwaves have special properties that are important for remote sensing. Longer wavelength microwave radiation can penetrate through cloud cover, haze, dust, and all but the heaviest rainfall as the longer wavelengths are not susceptible to atmospheric scattering which affects shorter optical wavelengths. This property allows detection of microwave energy under almost all weather and environmental conditions so that data can be collected at any time.