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Advances in Manufacturing 2018年第4期6卷 419-429页

作者： Ali Kalyon mustafa Giinay Dursun Ozyiirek Department of Manufacturing Engineering Karabiik University Karabiik 078050 Turkey Department of Mechanical Engineering. Karabiik University Karabuk 078050 Turkey

High chrome white cast iron is particularly preferred in the production of machine parts requiring high wear resistance. Although the amount of chrome in these materials provides high wear and corrosion resistances, it makes their machinability difficult. This study presents an application of the grey relational analysis based on the Taguchi method in order to optimize chrome ratio, cutting speed, feed rate, and cutting depth for the resultant cutting force (Fr) and surface roughness (Ra) when hard turning high chrome cast iron with a cubic boron nitride (CBN) insert. The effect levels of machining parameters on Fr and Ra were examined by an analysis of variance (ANOVA). A grey relational grade (GRG) was calculated to simultaneously minimize Fr and Ra. The ANOVA results based on GRG indicated that the feed rate, followed by the cutting depth, was the main parameter and contributed to respo ses. Optimal levels of parameters were found when the chrome ratio, cutting speed, feed rate, and cutting depth were 12%, 100m/min, 0.05mm/r, and 0.1mm, respectively, based on the multiresponse optimization results obtained by considering the maximum signal to noise (SIN) ratio of GRG. Confirmation results were verified by calculating the confidence level within the interval width.

关键词： High chrome cast iron Hard turning Grey relational analysis Multi-response optimization Taguchi method

Growth and Characterization of Cu2O Films Made by Rapid Thermal Oxidation Technique

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Chinese Physics Letters 2005年第11期22卷 2977-2979页

作者： Raid A. Ismail Ibrahim Ramadhan Aseel mustafa Department of Applied Physics Ministry of Sciences and Technology Baghdad Iraq Department of Physics College of Science University of Al-Mustansiriyah Iraq

Cu2O thin films with （111） preferred orientation have been grown on glass and Cu substrates by rapid thermal oxidation of Cu at 500℃ for 45s. The optical band gap energy was determined by spectral data of transmittance and absorbance to be 2.04eV. The electrical conductivity of grown films was measured around （1：1 × 10^-5Ω^-1cm^-1） at 300K. Thermoelectric power measurements of the film were carried out. Furthermore, the properties of these films are compared with properties of Cu2O obtained by other methods.

关键词： SINGLE-CRYSTAL THIN-FILMS CUPROUS OXIDE

Bake-Hardening Response of High Martensite Dual-Phase Steel with Different Morphologies and Volume Fractions

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Acta Metallurgica Sinica(English Letters) 2014年第2期27卷 279-289页

作者： mustafa Trkmen Sleyman Gndz Department of Metallurgy Kocaeli University Hereke Vocational School Department of Manufacturing Engineering Technology FacultyKarabk University

Bake-hardening behaviour of carbon steel with different martensite morphologies and volume fraction was investigated. The specimens with fibrous and bulky martensite were prestrained in tension by 4%. After this, they were unloaded and bake hardened at 180 ℃ for 10-160 min. It was found that dual-phase steel samples which were bake hardened at 180 ℃ for 20 rain showed an increase in the yield stress （YS） and ultimate tensile stress （UTS） but a decrease in ductility. Further increase in the bake-hardening time of 80 or 160 min has reduced the YS and UTS, but increased the ductility. △σ （increase in stress due to bake hardening）, YS and UTS values are higher for the microstructure containing fibrous martensite compared to the microstructure-containing bulky martensite. It was also observed that at a given baking temperature Aa, YS and UTS increased by volume of martensite.

关键词： Dual-phase steel Bake hardening Martensitic transformation

Microstructure,mechanical properties,and corrosion resistance of an explosively welded Mg-Al composite

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Journal of Magnesium and Alloys 2022年第4期10卷 1086-1095页

作者： mustafa Acarer Bilge Demir Burak Dikici Emin Salur Department of Metallurgical and Materials Engineering Technology FacultySelcuk UniversityKonya 42075Turkey Department of Mechanical Engineering Karabuk UniversityKarabuk 78100Turkey Department of Metallurgical and Materials Engineering Atatürk UniversityErzurum 25240Turkey

In this study,an attempt was made to manufacture an AZ31–Al5005 laminated composite by explosive welding.A mixture of ammonium nitrate(90%),fuel oil(5%),and TNT(5%)was used as the *** detonation velocity of the explosive material was approximately 3100 m•s^(−1).The microstructure and mechanical and corrosion properties of the joint were comparatively *** characterisation of the joint was conducted by optical microscopy(OM),scanning electron microscopy with energy-dispersive spectroscopy(SEM-EDS),high-resolution transmission electron microscopy(HR-TEM),and X-ray diffraction(XRD).The mechanical properties were determined using micro-Vickers hardness,tensile,and Charpy impact *** addition,electrochemical tests were conducted on the AZ31–Al5005 laminated composite and the individual components to determine their corrosion *** corrosion behaviours of the structures were determined in a 3.5%NaCl solution at room temperature using potentiodynamic scanning(PDS).The metallurgical structure and mechanical properties of the joints were within the acceptable limits.

关键词： corrosion welded Microstructure

Optimization of Neutrino Oscillation Parameters Using Differential Evolution

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Communications in Theoretical Physics 2013年第3期59卷 324-330页

作者： Ghulam mustafa Faisal Akram Bilal Masud Centre for High Energy Physics University of the PunjabLahore(54590)Pakistan

We show how the traditional grid based method for finding neutrino oscillation parameters △m2 and tan2θ can be combined with an optimization technique, Differential Evolution （DE）, to get a significant decrease in computer processing time required to obtain minimal chi-square （χ2） in four different regions of the parameter space. We demonstrate efficiency for the two-neutrinos case. For this, the χ2 function for neutrino oscillations is evaluated for grids with different density of points in standard allowed regions of the parameter space of △m2 and tan2θ using experimental and theoretical total event rates of ehlorine （Homestake）, Gallex＋GNO, SAGE, Superkamiokande, and SNO detectors. We find that using DE in combination with the grid based method with smail density of points can produce the results comparable with the one obtained using high density grid, in much lesser computation time.

关键词： solar neutrinos neutrino masses and mixing numerical optimization

Cognitive work analysis to comprehend operations and organizations in the mining industry

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International Journal of Mining Science and Technology 2017年第4期27卷 605-609页

作者： Serenay Demir Elie Abou-Jaoude mustafa Kumral Department of Mining and Materials Engineering McGill University Montreal H3A 0E8 Canada

Complex industrial systems, including mining, have a prominent challenge in understanding the interrelationship among the cognitive processes, working environment and available equipment. The concept of cognitive work analysis(CWA) transcends the traditional analytic methods of evaluating human tasks solely based on perceptual and physical traits, and rather implements the notions of behavioral and cognitive awareness indispensable for the intricacy of modern technology. In the last few decades, academic and industrial settings employ this type of analysis to set a suitable standard for a system's safety feasibility, and as a result reduce human-based errors. This research paper analyzes current CWA methods and proposes a five-level quantification model portraying the overall cognitive quality of a mining operation.

关键词： Cognitive work analysis Mining operations Cognitive awareness Work domain Human behavior Safety

Microstructure and hardness of Mg-based composites reinforced with Mg_2Si particles

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Rare Metals 2009年第4期28卷 396-400页

作者： mustafa Aydin Cem zgür Osman San Mechanical Engineering Department Dumlupinar University Ceramic Engineering Department Dumlupinar University

Magnesium powders were mechanically alloyed with SiO2 powder particles having different particle sizes using nigh-energy ball milling techniques under Ar atmosphere for 1 h. The powders were consolidated with cold pressing under 560 MPa. They were then sintered at 550℃ for 45 min under Ar atmosphere. The composites obtained on the Mg-SiO2 system were investigated using the Archimedes principle, a differential scanning calorimeter, X-ray diffraction, optic microscopy, and scanning electron microscopy. For the mechanically alloyed powders, the solid-state reaction of the synthesis of Mg2Si and MgO progressed further during sintering of the materials. The results showed that the strengthening mechanisms were dependent on dispersion hardening of fine Mg2Si and MgO particulates dispersed homogeneously in the matrix. Mg-

关键词： based composites SiO2 mechanical alloying strengthening mechanism

Management of diabetic foot ulcers and the challenging points:An endocrine view

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World Journal of Diabetes 2022年第1期13卷 27-36页

作者： Hakan Doğruel mustafa Aydemir mustafa Kemal Balci Division of Endocrinology and Metabolism Department of Internal MedicineAkdeniz University HospitalKonyaaltı07059AntalyaTurkey Division of Endocrinology and Metabolism Department of Internal MedicineAkdeniz University Faculty of MedicineKonyaaltı07059AntalyaTurkey

Diabetic foot ulcers(DFU)are one of the most challenging complications of *** to one-third of patients with diabetes mellitus(DM)may suffer from DFUs during their *** is one of the leading causes of morbidity in patients with *** treatment period is challenging,and the recurrence rate of DFUs is ***,establishing prevention strategies is the most important point to be emphasized.A multidisciplinary approach is necessary in the prevention and treatment of *** at risk should be identified,and prevention measures should be taken based on the risk *** a DFU is formed,the appropriate classification and evidence-based treatment interventions should be *** control,diagnosis and treatment of vascular disease,local wound care,diagnosis,and treatment of infection should be addressed along with the proper evaluation and management of general health status.

关键词： Diabetic foot Diabetic foot ulcer Amputation Diabetic foot infection

Noise Reduction Technique Applied to the Multichannel Analysis of Surface Waves

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Acta Geologica Sinica(English Edition) 2012年第5期86卷 1306-1311页

作者： Taohidul ISLAM Zamri CHIK Mohd Marzuki mustafa Department of Civil and Structural Engineering Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 BangiMalaysia Department of Electrical and Electronics Engineering Patuakhali Science and Technology University8602 PatuakhaliBangladesh Department of Electrical and Electronics and System Engineering Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 BangiMalaysia

This paper shows the presence of noises and technique to reduce these noises during the surface wave analysis. The frequency-dependent properties of Rayleigh-type surface waves can be used for imaging and characterizing the shallow subsurface. Interference by coherent source-generated noise inhibits the reliability of shear-wave velocities determined through inversion of the phase velocities of Rayleigh waves. Among these interferences by non-planar, non-fundamental mode Rayleigh waves （noise） are body waves, scattered and non-source-generated surface waves, and highermode surface waves. For the reduction of noise, the filtering technique is implemented in this paper for the multichannel analysis of surface wave method （MASW）. With the de-noising technique during the MASW method, more robust and reliable outcome is achieved. The significance of this paper is to obtain pre-awareness about noises during surface wave analysis and take better outcomes with denoising performance in near surface soil investigations.

关键词： multichannel analysis of surface wave method noises filtering near surface soil

Performance assessment of buildings via post-occupancy evaluation： A case study of the building of the architecture and software engineering departments in Salahaddin University-Erbil, Iraq

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Frontiers of Architectural Research 2017年第3期6卷 412-429页

作者： Faris All mustafa Department of Architecture College of Engineering Salahaddin University-Erbil Kurdistan Iraq

Buildings are established to meet the needs and desires of users. The purpose of a building is defeated if its users are not satisfied by the overall buildingl performance. This study determines whether the users of the building of the architectural and software engineering departments at Salahaddin University-Erbil are satisfied with overall performance attributes. Assessment using users as a benchmark shows that the potentiat for improving the performance of a building is tremendous. This paper develops a post-occupancy evaluation （POE） framework that integrates building performance attributes for university buildings and facilities in the Iraqi Kurdistan region based on users＇ satisfaction. The objectives were to identify the concept of POE in relation to building performance, to determine the performance level of an existing building, and to determine correlation between building performance and users＇ satisfaction level. Results showed that 88% of building performance attributes is highly correlated with users＇ satisfaction. The compelling correlational results confirmed the relevance of POE as a building performance tool. The thrust of the findings indicates that the indicators and variables used in assessing the level of building performance are significant in determining levels of users＇ satisfaction in university buildings and facilities.

关键词： Post occupancyevaluation University buildings Building performance User satisfaction Correlation Erbil city