FRACTIONAL DIFFERENTIATIONS AND INTEGRATIONS OF QUADRUPLE HYPERGEOMETRIC SERIES

Bin-Saad, Maged G.,Nisar, Kottakkaran S.,Younis, Jihad A. Korean Mathematical Society 2021 대한수학회논문집 Vol.36 No.3

The hypergeometric series of four variables are introduced and studied by Bin-Saad and Younis recently. In this line, we derive several fractional derivative formulas, integral representations and operational formulas for new quadruple hypergeometric series.

The Interplay between Comprehensive Use of Performance Management Systems and Corporate Financial and Non-Financial Performance: Evidence from Saudi Arabia

Ahmed Abdullah Saad AL-DHUBAIBI(Ahmed Abdullah Saad AL-DHUBAIBI ) 한국유통과학회 2023 The Journal of Asian Finance, Economics and Busine Vol.10 No.1

A significant body of prior research on performance management systems (PMSs) either explains the components and the design of the systems or investigates the link between particular system/s and organizational functions, capabilities, or performance. In contrast, this study investigates the comprehensive use of PMSs and relates them to corporate financial and non-financial performance. Further, this study examines whether the association between PMSs and performance varies between industries or is moderated by the size of the company. Data was collected using a questionnaire that was sent to companies from different industries operating in Riyadh province, where the most important businesses in Saudi Arabia are located. A total of 152 usable responses were received. The results of this study revealed that companies use a variety of PMSs at a balanced level. The extent of each category of PMS use is associated with the extent of other PMS categories’ use. However, the larger the company, the more PMSs it uses. Importantly, the results showed a positive and significant association between PMSs’ extent of use and both financial and non-financial performance. This association was minimally moderated by the company size and industry for specific categories of PMSs and performance.

Role of Alloying Composition on Mechanical Properties of CuZr Metallic Glasses During the Nanoindentation Process

Saade Abdalkareem Jasim,Muneam Hussein Ali,Zaid Hameed Mahmood,Mohammad Rudiansyah,Forat H. Alsultany,Yasser Fakri Mustafa,Montather F. Ramadan,Aravindhan Surendar 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.9

This paper aims to indicate the role of alloying composition on the nanomechanical properties of metallic glasses (MGs). Forthis purpose, the molecular dynamics simulation of nanoindentation process was performed for a wide range of Cu–Zr glassycompositions. The results indicated that the yielding event enhanced with the rise of Cu content; however, there existed anoptimized composition for the maximum hardening effect in the system. The investigation on the evolution of shear bandsalso showed that the formation of pile-ups around the indentation site and the propagation of dominant shear bands into theglassy structure occurred in the Cu-rich MGs. On the other side, the increase in Zr content led to the creation of a net-likeshear arrangement under the indented site. Moreover, the Voronoi tessellation analysis indicated that the decreasing/increasingrate of polyhedron types during the indenting process strongly relied on the alloying compositions.

DISTANCES OF GLOBULAR CLUSTERS BASED ON HIPPARCOS PARALLAXES OF NEARBY SUBDWARFS

SAAD SOMAYA MOHAMED,LEE SANG-GAK The Korean Astronomical Society 2001 Journal of The Korean Astronomical Society Vol.34 No.2

In the present study we have determined the distance moduli for seven globular clusters M2, M3, Ml0, M12, NGC 2808, NGC 6229, and NGC 6752, whose metallicities are in the range -1.54 < [Fe/H] < -1.10. We have derived distances for them by the main-sequence fitting method using a sample of local subdwarfs, whose accurate parallaxes are taken from the Hipparcos Catalog. The derived distance moduli are 15.52 for M2, 14.98 for M3, 14.23 for Ml0, 14.03 for M12, 15.56 for NGC 2808, 17.34 for NGC 6229, and 13.29 for NGC 6752.

Microorganism penetration in dentinal tubules of instrumented and retreated root canal walls. In vitro SEM study

Saad Al-Nazhan,Alaa Al-Sulaiman,Fellwa Al-Rasheed,Fatimah Alnajjar,Bander Al-Abdulwahab,Abdulhakeem Al-Badah 대한치과보존학회 2014 Restorative Dentistry & Endodontics Vol.39 No.4

Objectives: This in vitro study aimed to investigate the ability of Candida albicans (C. albicans) and Enterococcus faecalis (E. faecalis) to penetrate dentinal tubules of instrumented and retreated root canal surface of split human teeth. Materials and Methods: Sixty intact extracted human single-rooted teeth were divided into 4 groups, negative control, positive control without canal instrumentation, instrumented, and retreated. Root canals in the instrumented group were enlarged with endodontic instruments, while root canals in the retreated group were enlarged, filled, and then removed the canal filling materials. The teeth were split longitudinally after canal preparation in 3 groups except the negative control group. The teeth were inoculated with both microorganisms separately and in combination. Teeth specimens were examined by scanning electron microscopy (SEM), and the depth of penetration into the dentinal tubules was assessed using the SMILE view software (JEOL Ltd). Results: Penetration of C. albicans and E. faecalis into the dentinal tubules was observed in all 3 groups, although penetration was partially restricted by dentin debris of tubules in the instrumented group and remnants of canal filling materials in the retreated group. In all 3 groups, E. faecalis penetrated deeper into the dentinal tubules by way of cell division than C. albicans which built colonies and penetrated by means of hyphae. Conclusions: Microorganisms can easily penetrate dentinal tubules of root canals with different appearance based on the microorganism size and status of dentinal tubules.

Deciphering unclassified tumors of non-small-cell lung cancer through radiomics

Saad, Maliazurina,Choi, Tae-Sun Elsevier 2017 Computers in biology and medicine Vol.91 No.-

<P><B>Abstract</B></P> <P><B>Background</B></P> <P>Tumors are highly heterogeneous at the phenotypic, physiologic, and genomic levels. They are categorized in terms of a differentiated appearance under a microscope. Non-small-cell lung cancer tumors are categorized into three main subgroups: adenocarcinoma, squamous cell carcinoma, and large cell carcinoma. In approximately 20% of pathology reports, they are returned unclassified or classified as not-otherwise-specified (NOS) owing to scant materials or poor tumor differentiation.</P> <P><B>Method</B></P> <P>We present a radiomic interrogation of molecular spatial variations to decode unclassified NOS tumor architecture quantitatively. Twelve spatial descriptors with various displacements and directions were extracted and profiled with respect to the subgroups. The profiled descriptors were used to decipher the NOS tumor morphologic clues from the imaging phenotype perspective. This profiler was built as an extended version of a conventional support-vector-machine classifier, wherein a genetic algorithm and correlation analysis were embedded to define the molecular signatures of poorly differentiated tumors using well-differentiated-tumor information.</P> <P><B>Results</B></P> <P>Sixteen multi-class classifier models with an 81% average accuracy and descriptor subset size ranging from 12 to 144 were reported. The average area under the curve was 86.3% at a 95% confidence interval and a 0.03–0.08 standard error. Correlation analysis returned an unclassified NOS membership matrix with respect to the cell-architecture similarity score for the subgroups. The best model demonstrated 53% NOS reduction.</P> <P><B>Conclusion</B></P> <P>The membership matrix is expected to assist pathologists and oncologists in cases of unresectable tumors or scant biopsy materials for histological subtyping and cancer therapy.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Non-small cell lung cancer Not-Otherwise-Specified or unclassified tumors not rare </LI> <LI> A quantitative analysis of radiomics is proposed to reduce the NOS cases </LI> <LI> The proposed method decodes the NOS tumor molecular composition computationally </LI> <LI> A membership matrix is used to correlate the NOS tumors to the known subgroups </LI> <LI> The proposed method may benefit patients with unresectable tumors. </LI> </UL> </P>

A Novel Olfactory Displays' Scent Dispersing Module

Saad Hameed Abid,Zhiyong Li,Renfa Li,Jumana Waleed 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.1

Olfactory display devices have become a recent demand and trend in human computer interaction, providing a new member in the human computer interaction peripheral devices family. These devices enrich the olfactory sense for the user stimulating him/her by means of scent stimuli in correspondence to an object or an event shown on the visual display. Some researches have been done to cover the design, usage and delivery for the scent to the users, other works covered some analysis on the scent categorization and grouping. In this paper a focus is on the controlled atomization of a liquid based scent material while guaranteeing: speed, intensity, durability, compactness and scalability, these important factors are crucial to build a commercial grade olfactory displays containing a universal, interchangeable and versatile but yet durable scent disparity component to facilitate the realization of olfactory display devices.

Transformation of Silicon Nanowire into Nanopyramid in Alkaline Solution and its Implication in Silicon-Air Battery

Saad Sarwar,Minsun Kim,Giljae Baek,오일환,이호춘 대한화학회 2016 Bulletin of the Korean Chemical Society Vol.37 No.7

Si–air battery (SAB) comprising of Si nanowire (SiNW) anode and alkaline solution and showing a working voltage of ca. 1.2V is investigated to elucidate the origin of superior discharge performance of the nanostructured Si anode to that of a planar Si anode. The SiNWs are found to transform into Si nanopyramids (SiNPs) upon immersion in the alkaline solution or when subjected to SAB discharge. In this regard, the improved performance of the SiNW anode is attributed to the formation of SiNPs with (111) facets that are intrinsically resistant to passivation. In addition, the nanostructured Si anode also shows a lower threshold temperature for the surface passivation than the planar Si anode, a merit that leads to a sustained discharge even at room temperature.

Heat based Odors Delivery Apparatus for Interactive Game Playing

Saad Hameed Abid,Zhiyong Li,Renfa Li,Jumana Waleed 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.5

Scent delivery systems or what are known as olfactory displays has been the most recent trend in human computer interaction, control and automation, virtual reality, augmented reality, e-commerce and many other fields in the computer world. These devices have the ability to generate smell combinations for some digital items in the computer virtual world. The idea is to deliver additional perception (olfactory perception) to the user to enrich his/her indulgence while interacting with the computer. The proposed olfactory display is similar to this concept but greatly differ in many aspects, using laser based atomization method to produce enough sudden heat to generate odors that cannot be generated using chemical materials these odors are smoke, gun powder, wood milling, cigarettes smoking, plastic melting and Incense. All olfactory displays researchers avoid involving these types of odors in their studies due to the difficulty of the generation and control of such odors and the absence of their correct and precise generation using chemical materials. The proposed system will provide a way of generating such odors while interactive game is being played by a user with minimum impact on the environment to avoid adaption to the user's olfactory system and polluting the environment that the user occupies.

Reaction Force Estimation of 1 Link Robotic Manipulator Using Robust Control

Saad Jamshed,Karam Dad Kallu,Min-Cheol Lee 제어로봇시스템학회 2018 제어로봇시스템학회 국내학술대회 논문집 Vol.2018 No.5