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- 저자 : Ali, Mushtaq (검색결과 8,824 건)
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Pack-Boriding of Monel 400: Microstructural Characterization and Boriding Kinetics
Ali Günen,Mourad Keddam,Azmi Erdoğan,Mustafa Serdar Karakaş 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.8
Monel 400 was pack-borided in the temperature range of 1173–1273 K for exposure times of 2–6 h. The boride layersproduced on the surface of the alloy were examined by scanning electron microscopy and phase identification was carriedout by X-ray diffraction. The topmost layer on the borided Monel 400 was compact and contained the Ni2Bphase whilethe diffusion zone contained grain boundary precipitates of borides. Boride layers of 35–290 μm thickness and 1002–1476HV0.025hardness were obtained. SEM observations revealed a smooth interface between the boride layer and the diffusionzone. A kinetic model based on the integral method was applied to investigate the kinetics of Ni2Blayer. The boron activationenergy in the Ni2Blayer was estimated as equal to 300.7 kJ mol−1. An experimental validation of the model was madeby comparing the experimental layer thicknesses obtained, after boriding at 1198 K for 1 and 3 h, with predicted values.
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Between pairwise $-\alpha -$ perfect functions and pairwise $-T-$ $\alpha -$ perfect functions
Ali A. Atoom,Feras Bani-Ahmad 한국전산응용수학회 2024 Journal of applied mathematics & informatics Vol.42 No.1
Many academics employ various structures to expand topological space, including the idea of topology, as a result of the importance of topological space in analysis and some applications. One of the most notable of the generalizations was the definition of perfect functions in bitopological spaces, which was presented by Ali.A.Atoom and H.Z.Hdeib. We propose the notion of $\alpha -$ pairwise perfect functions in bitopological spaces and define different types of this concept in this study. Pairwise $-T-$ $\alpha-$ perfect functions, pairwise $-\alpha -$irr-perfect functions, and pairwise $-T-$ $\alpha -$ irr-perfect functions, are all characterized in addition to pairwise $-\alpha -$perfect functions. We go through their primary characteristics and show how they interact. Finally, under these functions, we introduce the images and inverse images of certain bitopological features. About these concepts, some product theorems have been discovered.
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Ali,Ocktaeck Lim(임옥택) 한국자동차공학회 2024 한국자동차공학회 부문종합 학술대회 Vol.2024 No.6
There are many methodology to decrease the amount of emissions that are being expelled from different type of energy-consuming machines. One of the most widespread of this is vehicles, with internal combustion powered vehicles being the most widely used type in the world. Discussing specifically regarding internal combustion engine, many different approaches are employed. Using different fuel mixtures has been one of the strategies to decrease emissions, and this can impact the characteristics and performance in the internal combustion engine. An alternative substance from green energy is very promising in the time where the importance of emission reduction is key to the development of clean fuel. The main objective of this study is to investigate the combustion characteristics and performance of a compression engine with various fractions of dieselammonia fuel mixture. The study will present a simulation model created with AVL simulation software to simulate the combustion process. Based on the simulation done, is found that the addition of ammonia up to 40% of fuel mass per cycle will reduce the pressure and rate of heat release, as well as increasing its BSFC but maintaining the overall efficiency. From these findings, it can be said that while ammonia is an interesting option for future clean-energy based engine to reduce key emissions, more consideration must be taken based on its impact on combustion characteristics and performance.
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Ahmet Yusuf Ş,engü,l,Sü,leyman Ç,aliş,lar 한국축산식품학회 2020 한국축산식품학회지 Vol.40 No.3
This study was conducted to investigate whether adding different levels of raw or differently processed chickpea into different diets of laying quails affected live weight, feed intake, feed efficiency, egg weight and internal and external egg quality. Chickpea was used as raw, autoclaved or microwave-processed, and it was involved in the diets on two different levels (20% and 40%). The sample was divided into 7 groups including the control, 20% and 40% raw, 20% and 40% autoclaved, and 20% and 40% microwaveprocessed groups. 336 ten-week-old female laying quails were used in the study, and the experiment continued for 19 weeks. In the study, the differences among the groups were insignificant in terms of live weight, feed intake, feed efficiency, egg weight and egg quality characteristics such as shell thickness, shell weight, yolk weight, yolk color and albumin index. The differences were significant in terms of the shape index, Haugh unit (p<0.05) and yolk index (p<0.01). Consequently, it was observed that different thermal processes on chickpeas did not usually have a significant effect on the yield performance of the quails, and the results that were obtained were similar to the other groups. However, it was determined that some egg quality characteristics were affected by the autoclaving and microwaving processes. Between the thermal processes, it may be stated that autoclaving provided better results.
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Thiol Disulfide Homeostasis in Schizophrenic Patients Using Atypical Antipsychotic Drugs
Halef Okan Dogan,Etem Erdal Ersan,Hüseyin Aydin,Serpil Erdoğan,Serpil Erşan,Murat Alişik,Sevtap Bakir,Özcan Erel,Derya Koç 대한정신약물학회 2018 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.16 No.1
Objective: Schizophrenia is a severe, debilitating mental disorder characterized by behavioral abnormalities. Although several studies have investigated the role of oxidative stress and the effects of antipsychotic drugs on oxidative markers in schizophrenia, adequate information is not available on these issues. The aim of this study is to determine the changes in oxidative status and thiol disulfide homeostasis in schizophrenic patients using atypical antipsychotic drugs. Methods: Thirteen schizophrenic patients using atypical antipsychotic drugs and 30 healthy controls were included this study. The concentrations of total oxidant status (TOS), total antioxidant status (TAS), native thiol, total thiol, and disulfide levels were determined in the study population. Results: The TAS (p=0.001), total thiol, and native thiol levels (p<0.001) were higher in the patients compared to the controls, whereas the TOS and disulfide levels were lower in the patients than in the controls (p<0.001). Conclusion: These results may suggest that atypical antipsychotic drugs have a useful therapeutic effect by reducing oxidative stress via the inhibition of the formation of disulfide bonds. The study population number was one of the limitations of this study. Therefore, further studies are needed to establish the association between thiol disulfide homeostasis in schizophrenic patients using atypical antipsychotic drugs
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Mohammed Ali Mohamed Ahmed ALI(Mohammed Ali Mohamed Ahmed ALI ),Ahmed Saied Rahama ABDALLAH(Ahmed Saied Rahama ABDALLAH ),SalimAhmed Mohamed AlSHEHRI(SalimAhmed Mohamed AlSHEHRI ) 한국유통과학회 2023 The Journal of Asian Finance, Economics and Busine Vol.10 No.2
This research aims to identify the role that small and medium enterprises (SMEs) can play in achieving the economic goals of the vision of Saudi Arabia 2030. The study relied on descriptive analysis, designing a standard model, and analyzing it using the Eviews9 program. The study also adopted the questionnaire as a tool for data collection. The study area covered Alkharj and Hawtat Bani Tamim governorates. The sample size of the study was 142 participants. The study’s results confirmed the existence of a significant impact of changes in independent variables (X1, X2, X3, X4), which are (GDP, non-oil exports, number of employees, and public revenues), respectively. The dependent variable (Y) represents the number of small and medium-sized businesses in the Kingdom of Saudi Arabia. Additionally, it was found that 61.3% of small and medium-sized enterprises in the governorates of Al-Kharj and Hawtat Bani Tamim operate in the commercial sector. Most study participants concur that SMEs significantly lowered the unemployment rate and helped boost the GDP rate in the Kingdom of Saudi Arabia. The obstacles and difficulties facing the establishment of these enterprises were financial problems, marketing problems, and corporate monopoly. Furthermore, most of the small and medium l enterprises faced financing problems.
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