Business Continuity Management & Disaster Recovery Capabilities in Saudi Arabia ICT Businesses

Thamer Al Hamed,Mamdouh Alenezi 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.11

A sustainable business continuity management plan (BCM) is developed to adapt and respond to the current complex and dynamic business environment, while simultaneously accommodating the key system transformations. As an integral part of BCM, business preparedness reduces the impact of a disruption to employees, productivity and profitability. Additionally, BCM and disaster recovery helps service providers and owners of critical infrastructure, such as telecommunication networks and digitized energy utilities to resume operation within the shortest time in the event that a disaster strikes. The central drive of this extensive research is developing a maturity model for BCM/DR for measuring the capability of BCM and disaster recovery for the Kingdom of Saudi Arabia (KSA) companies. A qualitative research scheme, marked by an open-structured interview was adopted to explore the core aspect of the research topic. A customized maturity model for the KSA ICT sector was developed by analyzing the existing model and then validating the developed maturity model against the predefined objectives. The research demonstrated that the establishment of a standardized maturity model for BCM/DR as capability instrument for the ICT segment is valuable to address the gap in KSA organizations as they assess the competences of their BCM/DR programs or processes.

Does the quality of orthodontic studies influence their Altmetric Attention Score?

Thamer Alsaif,Nikolaos Pandis,Martyn T. Cobourne,Jadbinder Seehra 대한치과교정학회 2023 대한치과교정학회지 Vol.53 No.5

Objective: The aim of this study was to determine whether an association between study quality, other study characteristics, and Altmetric Attention Scores (AASs) existed in orthodontic studies. Methods: The Scopus database was searched to identify orthodontic studies published between January 1, 2017, and December 31, 2019. Articles that satisfied the eligibility criteria were included in this study. Study characteristics, including study quality were extracted and entered into a pre-pilot data collection sheet. Descriptive statistics were calculated. On an exploratory basis, random forest and gradient boosting machine learning algorithms were used to examine the influence of article characteristics on AAS. Results: In total, 586 studies with an AAS were analyzed. Overall, the mean AAS of the samples was 5. Twitter was the most popular social media platform for publicizing studies, accounting for 53.7%. In terms of study quality, only 19.1% of the studies were rated as having a high level of quality, with 41.8% of the studies deemed moderate quality. The type of social media platform, number of citations, impact factor, and study type were among the most influential characteristics of AAS in both models. In contrast, study quality was one of the least influential characteristics on the AAS. Conclusions: Social media platforms contributed the most to the AAS for orthodontic studies, whereas study quality had little impact on the AAS.

Impact of Booster Section Length on the Performance of Linear Cavity Brillouin-Erbium Fiber Laser

Thamer Fahad Al-Mashhadani,Md Zaini Jamaludin,Mohammed Hayder Al-Mansoori,Abdulla Khudair Abbas,Fairuz Abdullah 한국광학회 2014 Current Optics and Photonics Vol.18 No.2

The impact of booster section length made from passive erbium-doped fiber (EDF) on the L-band multiwavelength Brillouin-Erbium fiber laser (MBEFL) is studied experimentally in this paper. The influence on the performance of MBEFL in term of number of generated Stokes lines, tuning range and lasing threshold were investigated. A comparison was made between MBEFL without a booster section and with booster sections of different lengths. Through comparative study and at fixed BP power and 100mW of 1480 pump power, longer passive EDF length of 5m exhibits the highest average number of Stokes lines of 23 with tuning range of 14nm. In contrast, shorter passive EDF length of 1m shows the highest tuning range of 17nm and an average number of 21 Stokes lines.

Strength of a 3D Printed Al 7068 Alloy Under Micro-Pillar Compression

Thamer Tabbakh,Saeed Alshihri,A. K. Basak,Abdulaziz Kurd 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.11

The present work investigates the mechanical properties of as-built laser powder bed fusion (L-PBF) Aluminium 7068 alloys,together with microstructural characterization. To achieve this, micro-pillar compression (in-situ) was conducted and thestate of the materials under compression were correlated with respective stress–strain curves. A cast alloy of similar bulkcomposition was also investigated, under identical conditions, as a benchmark material. As opposed to the larger sphericalgrains (about 4 μm) of the cast alloy, the L-PBF alloy exhibited typical ‘melt pool’ meso-structure, combined with refinedmicrostructure induced by rapid cooling and gave rise to sub-micron range grain sizes. The mechanical properties of theL-PBF alloy are anisotropic in nature, due to its bi-modal type meso- and micro-structure. Cross-sectional SEM investigationwas carried out on deformed micro-pillars and revealed that there exist numerous slip and shear plane networks that servedas load accommodation mechanism during compression.

Cobalt-incorporated, nitrogen-doped carbon nanofibers as effective non-precious catalyst for methanol electrooxidation in alkaline medium

Thamer, B.M.,El-Newehy, M.H.,Al-Deyab, S.S.,Abdelkareem, M.A.,Kim, H.Y.,Barakat, N.A.M. Elsevier 2015 Applied Catalysis A Vol.498 No.-

Among the nanosupports, carbon nanofibers distinctly enhance the performance of the functional electrocatalysts because the adsorption capacity and low resistance electron transfer due to the large axial ratio. Moreover, nitrogen doping shows positive influence toward electrooxidation ability. In this study, Co-incorporated and nitrogen-doped carbon nanofibers are introduced as effective non-precious electrocatalyst for methanol oxidation in the alkaline medium. The introduced NFs have been prepared using facile, simple, high yield, low cost, and effective technique; electrospinning. Typically, calcination of cobalt acetate/urea/poly(vinyl alcohol) electrospun mats at 850<SUP>o</SUP>C in argon atmosphere leads to produce the introduced nanofibers. The structure, composition and morphology were characterized by FT-IR, XRD, EDX, FE-SEM and TEM techniques. The electrocatalytic activity of the introduced nanofibers toward methanol oxidation was evaluated by cyclic voltammetry (CV). Study the influence of the nitrogen content could be investigated by adjusting the urea content in the original electrospun nanofiber mats. The results indicated that the activity of the catalyst increases with increasing urea content in the electrospun solution up to 4%. A maximum current density was 100.84mAcm<SUP>-2</SUP> for Co/N(4%)-CNFs that was higher than the undoped ones (63.56mAcm<SUP>-2</SUP>). Moreover, good chemical stability was observed due to covering the metals NPs by carbon shells. Overall, nitrogen doping enhances electrocatalytic activity of Co/CNFs toward methanol oxidation in alkaline media.

Pregabalin versus Gabapentin Efficacy in the Management of Neuropathic Pain Associated with Failed Back Surgery Syndrome

Laith Thamer Al-Ameri,Mohammed Emad Shukri,Ekhlas Khalid Hameed,Ahmed Abed Marzook 대한신경외과학회 2024 Journal of Korean neurosurgical society Vol.67 No.2

Objective : Failed back surgery syndrome (FBSS) is a common long-term complication following spine surgeries characterized by chronic persistent pain; different strategies of management were employed to deal with it. This clinical trial aims to compare the efficacy of Pregabalin and Gabapentin in the management of this condition. Methods : A double-blind, randomized, comparative study (clinical trial registry NCT05324761 on 11th April 2022) with two parallel arms with Pregabalin and Gabapentin were used in arms one and two, respectively. Visual analog scale was used for basal and endpoint assessment of pain. T-test and analysis of covariance were used to deal with different variables. A pairwise test was used to compare pairs of means. Results : Of 66 patients referred to the trial, 64 were eligible, with 60 patients completing the 30 days trial. Both pregabalin and gabapentin effectively reduce pain, with significant p-values of 0.001 for each group. However, the pregabalin group was superior to gabapentin in pain reduction (p=0.001). Gender was an insignificant factor (p=0.574 and p=0.445 for the pregabalin and gabapentin groups, respectively, with a non-significant reduction (p=0.393) for both groups in total. Location of stenosis before surgery and type of surgery performed show non-significant effect on pain reduction for both groups. Conclusion : Both pregabalin and gabapentin effectively and safely relieve neuropathic pain associated with FBSS; pregabalin was significantly more effective irrespective of the patients’ gender.

Isolated Neurological Manifestation in Silent Celiac Disease

Salma Mohamed Tarabzouni,Thamer Alkhairallah 대한파킨슨병및이상운동질환학회 2017 Journal Of Movement Disorders Vol.10 No.2

Synthesis and mechanical properties of flax fabric reinforced geopolymer composites

Assaedi, Hasan S.,Alomayri, Thamer S.,Shaikh, Faiz U.A.,Low, It-Meng Techno-Press 2014 Advances in materials research Vol.3 No.3

Geopolymer composites reinforced with different layers of woven flax fabric are fabricated using lay- up technique. Mechanical properties, such as flexural strength, flexural modulus and fracture toughness of geopolymer composites reinforced with 2.4, 3 and 4.1 wt% flax fibres are studied. The fracture surfaces of the composites are also examined using scanning electron microscopy. The results show that all the mechanical properties of the composites are improved by increasing the flax fibre contents. It is also found that the mechanical properties of flax fabric reinforced geopolymer composites are superior to pure geopolymer matrix. Micro-structural analysis of fracture surface of the composites indicated evidence of various toughening mechanisms by flax fabrics in the composites.

Space Division Multiple Access Base Station (SDMA) Based on Block Adaptive Euclidean Direction Search Algorithm

Vian S. AL-Doori,Thamer M. Jamel,Bashar M. Mansoor 대한전자공학회 2022 IEIE Transactions on Smart Processing & Computing Vol.11 No.2

An impulse response is present in long-length wireless communication channels in communication systems such as massive MIMO or 5G systems that use block coding, such as Low-Density Parity-Check (LDPC) code. To deal with it, it is favorable to use block adaptive filtering instead of sequential or traditional algorithms. In this study, a block adaptive algorithm called the Speedy Euclidean Direction Search (SEDS) algorithm is proposed for a Space Division Multiple Access Base Station (SDMA) to perform adaptive beamforming operation of the system. An investigation and analysis of the performance of the SEDS algorithm were conducted using SDMA with a Multiple Input Single Output (MISO) downlink scheme that uses block processing of the data samples for a single-cell downlink. Moreover, a novel and fair comparative study was carried out between SEDS and the Block adaptive Least Mean Square (BLMS) algorithm. As far as we know, no research has used the BLMS algorithm for the SDMA system, which is another contribution of this study. The simulation results demonstrate that the SEDS algorithm has fast convergence and a very accurate estimation compared with BLMS. Moreover, the SEDS algorithm has better performance in indoor environments compared with BLMS. On the other hand, SEDS starts to be unstable for a large value of block length (L), whereas BLMS stays stable especially for outdoor environments.

Influence of firing temperature on selected mechanical properties of alluvial clay blended with a limestone and kaolin mixture

Mengue Paulette Cathy,Mbessa Michel,Cengiz Özgür,Kaze Rodrigue Cyriaque,Salman Alomayri Thamer,Pettang Chrispin 한국자원공학회 2023 Geosystem engineering Vol.26 No.4

The present study investigated the feasibility of low-energy and low-cost production of ceramic products from widely available alluvial clay in Batchenga, Cameroon, using low firing temperatures. A mixture consisting of 70% kaolin and 30% limestone was prepared and used as an additive in fired alluvial clay bricks. A series of samples was prepared in which the additive made up 5, 10 or 15% of the clay products, and the samples were heated at 700, 750, 800, 850 or 900 °C. The raw materials and ceramic products were characterised using x-ray diffractometry, scanning electron microscopy, bulk density, porosity, thermogravimetry and differential scanning calorimetry analysis. The results revealed that products with 10% additive showed improved mechanical performance and densification after heating at all tested temperatures. A compressive strength of 28 MPa was recorded when the product was heated at 800 °C. A drastic decrease in performance was observed for all samples heated at above 800 °C; this was likely due to the conversion of CaCO3 into CaO, resulting in the appearance of voids within the matrix that weakened the structure. This is in line with the high-water absorption and porosity values recorded. The resultant ceramic products have potential for use in engineering applications.