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Abdul Kareem Abdul Jawwad 대한산업공학회 2020 Industrial Engineeering & Management Systems Vol.19 No.2
Several CEA tools are available to the analyst. Usually an analytical tool, such as the cause and effect diagram is applied for the investigation phase while a visual display tool, such as Pareto and pie charts, is used for presentation and decision support. A thorough look into these tools reveals the presence of fundamental limitations such as: (i) the particular tool is only efficient in the investigative stage but not in decision support, (ii) no qualitative and/or quantitative relationships between causes and effects can be obtained or (iii) the tool cannot accommodate multi-level CEA analyses. A new tool called the Drain-Pipe-Diagram (DPD) has been developed to overcome these limitations and enable easy decision making. The principle of the DPD derives from the working nature of a typical drainpipe network where the main collection-pipe resembles the “main effect” whereas higher-level feeding pipes resemble causes and sub-causes. In addition, color coding and diametrical ratios were used to signify importance and share, respectively. The DPD was assessed against other CAE tools using a practical case study and proved to be superior to all compared CEA tools in both diagnostic and presentation abilities. Furthermore, the DPD was successfully applied to non-technical areas including environmental applications.
A Novel Fuzzy Logic Based Operating System Scheduling Scheme
Abdul Kareem,Varuna Kumara 한국지능시스템학회 2024 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.24 No.1
For a computer-based system, a set of processes must be scheduled such that every process iscompleted within its deadline. CPU scheduling is the process of allocating CPU among variousprocesses in a multi-processing system. The decision to allocate the CPU to a process has totake into consideration all aspects, including its priority and execution time, as scheduling isguided by a number of factors other than the execution time or priority. It is no longer onedimensionaland has become a multidimensional problem with vagueness and uncertaintiessuch as different CPU loading scenarios. The vagueness and uncertainties associated withthe decision to allocate a CPU to a particular process can be addressed using a fuzzy logicapproach. In this study, we propose a fuzzy logic based algorithm for CPU scheduling. Theproposed algorithm was compared with conventional scheduling algorithms for different CPUloading scenarios. The proposed method can schedule and execute all processes well withinthe deadline with a reduced average turn-around and a reduced average waiting time. Fromthe comparison results, it is evident that the proposed algorithm outperforms conventionalalgorithms in terms of the average turn-around and waiting times.
Abdul Kareem Lado,V. V. Singh,Kabiru. H. Ismail,Yusuf Ibrahim 한국신뢰성학회 2018 International Journal of Reliability and Applicati Vol.19 No.1
This paper develops a model of a complex repairable system having two subsystems A and B which is connected in a series configuration. The subsystem A consist of two units, A1 and A2 and the subsystem B also consist two units B1 and B2. The system is assumed to work till at least one unit of both subsystem are in good operative condition. The both subsystems have different failure rates and repair rates. Through consideration, the units of the subsystems A1 and B1 have priority in repair over A2 and B2. The system is studied using a supplementary variable and varies measures of system reliability Availability, Reliability, (Mean time to failure) MTTF, Sensitivity, and cost analysis has been evaluated for particular values of the failure and repair rates.The computed results are demonstrated by tables and figures.
ON COMMUTATIVITY OF NILPOTENT ELEMENTS AT ZERO
Abdul-Jabbar, Abdullah M.,Ahmed, Chenar Abdul Kareem,Kwak, Tai Keun,Lee, Yang Korean Mathematical Society 2017 대한수학회논문집 Vol.32 No.4
The reversible property of rings was initially introduced by Habeb and plays a role in noncommutative ring theory. In this note we study the reversible ring property on nilpotent elements, introducing the concept of commutativity of nilpotent elements at zero (simply, a CNZ ring) as a generalization of reversible rings. We first find the CNZ property of 2 by 2 full matrix rings over fields, which provides a basis for studying the structure of CNZ rings. We next observe various kinds of CNZ rings including ordinary ring extensions.
Kalathil, Abdul Kareem,Arunkumar, Paulraj,Kim, Da Hye,Lee, Jong-Won,Im, Won Bin American Chemical Society 2015 ACS APPLIED MATERIALS & INTERFACES Vol.7 No.13
<P>Li-rich layered oxides are the most attractive cathodes for lithium-ion batteries due to their high capacity (>250 mAh g(-1)). However, their application in electric vehicles is hampered by low power density and poor cycle life. To address these, layered Li2Ru0.75Ti0.25O3 (LRTO) was synthesized and the influence of electroinactive Ti4+ on the electrochemical performance of Li2RuO3 was investigated. LRTO exhibited a reversible capacity of 240 mAh g(-1) under 14.3 mA g(-1) with 0.11 mol of Li loss after 100 cycles compared to 0.22 mol of Li for Li(2)Ru(0.75)Sn(0.2)5O(3). More Li+ can be extracted from LRTO (0.96 mol of Li) even after 250 cycles at 143 mA g(-1) than Li2RuO3 (0.79 mol of Li). High reversible Li extraction and long cycle life were attributed to structural stability of the LiM2 layer in the presence of Ti4+, facilitating the lithium diffusion kinetics. The versatility of the Li2MO3 structure may initiate exploration of Ti-based Li-rich layered oxides for vehicular applications.</P>
الرجز بين القياس والتذوّق قراءة في الموروث العروضيّ والنقديّ
ناطحقدعسأيمركلادبع ( Abdul Kareem Asaad Qahtan ) 한국아랍어아랍문학회 2019 아랍어와 아랍문학 Vol.23 No.1
This research consists of a preface, an introductory chapter, a discussion of the topic along with analysis of its proceedings, evaluation of the results, as well as summary and presentation of the sources and references that the researcher utilized. The preface explores the reasons of conducting this research on Rajaz. In fact, Rajaz, either in its meter or rhyme, has been extensively tackled in many discussions in the ancient and modern monetary heritage. These discussions were concerned with much of its traits such as the reason of naming it like so, its structure, its position with regard to the chronological arrangement of the other measures of Arabic poetry, its relation to both concepts of al-Qareed (poetry) and Qaseed (poem), as well as the aesthetical value of Rajaz poetry compared to the poetry of other meters. These discussions, however, are reviewable in terms of their content and results. That is why this research is valuable and significant. The introductory chapter reviews the concepts, terms and mechanisms to be adopted in this research justifying their usability and validity in achieving the convincing results. Tackling this topic and analyzing its proceedings, the researcher began with discussing the meaning of Rajaz literally and technically, its relation to the meaning of al-Qareed (poetry) and al-Qaseed (poem), as well as discussing the rhythmic structure of Rajaz in the various stages of the Arabic poetry rhetoric improvement. The researcher discussed also the critics’ perceptions about the aesthetical value of Rajaz poetry and evaluated this value in light of the prevailing poetic rhetoric and in its transformations along the historical course. He then ended up with a result that Rajaz is like the first meter in the history of the Arabic-poetic rhythm; the origin from which the other poetic meters in all stages of the Arabic poetry were derived. The notion of al-Qareed (poetry), that was used in a later stage of the improvement of Rajaz, was related to the structure of the two-hemistich line (of poetry), either in Rajaz or other meters that developed thereafter, as it was a measure to the first structure of Rajaz embodied in the two-hemistich line, while the notion of al-Qaseed was related to the form that may represent the notion of the poem. However, the difference of the level of its impact in old and modern times is explained according to its structure compared to the other meters and its relation with the functions of the rhythm in the poetic rhetoric. The functions of the poetic rhythm are determined by warble, tension and expressing the meaning. These are interrelated functions, though each of them has its measurable limitations imposed by the prevailing rhetoric, and it seems to be a dominant function over the other functions. There are two kinds of eloquence that dominated the rhetoric of the Arabic poetry, namely: Oral Eloquence, which prevailed in the old and traditional poetry and Written Eloquence, which prevailed in modern poetry. Between these two kinds, the Romantic Poetry represents a midway or a transition between these two distinctive stages of the development of the Arabic poetic rhetoric. When it comes to Oral Eloquence, the positive value of the poem was to be determined by its ability to achieve quick and immediate aesthetic response by the recipients. That is why Oral Eloquence requires taking care of the sound to the greatest degree; and therefore, the function of musicality dominated. Rajaz poetry is the poorest meter to achieve this function. That is because it is a simple meter that is built on the repetition of a single rhythmic unit that is not composed with another unit(s). This made the highly-cohesive compound meters- on the top of which is al-Taweel meter- clearly dominant. When the dominance was assumed by the Written Eloquence that necessitates the poem to take intensive care of the meaning, as the structure of the line and the hemistiches was overstepped therein to the structure of the foot (of a verse meter). This was made at the expense of taking care of the function of musicality. Thereupon, Rajaz had its considerable impact like the other meters that depend on the repetition of a single or a simple compound unit.