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LBC-IoT: Lightweight Block Cipher for IoT Constraint Devices

Computers, materials & Continua 2021年第6期67卷 3563-3579页

作者： Rabie A.Ramadan Bassam W.Aboshosha Kusum Yadav ibrahim m.alseadoon munawar J.Kashout mohamed Elhoseny College of Computer Science and Engineering University of Ha’ilHa’il81481Saudi Arabia Department of Computer Engineering Faculty of EngineeringCairo UniversityCairo12613Egypt Department of Computer Engineering Higher Institute of EngineeringElshorouk AcademyCairoEgypt Faculty of Computers and Information Mansoura UniversityEgypt College of Computer Information Technology American University in the EmiratesUnited Arab Emirates

With the new era of the Internet of Things(IoT)technology,many devices with limited resources are *** devices are susceptible to a signicant number of new malware and other risks emerging *** of the most appropriate methods for securing those IoT applications is cryptographic algorithms,as cryptography masks information by eliminating the risk of collecting any meaningful information *** ensures that all data communications are private,accurate,authenticated,authorized,or *** conventional cryptographic algorithms have been developed specically for devices with limited resources;however,it turns out that such algorithms are not ideal for IoT restricted devices with their current ***,lightweight block ciphers are gaining popularity to meet the requirements of low-power and constrained devices.A new ultra-lightweight secret-key block-enciphering algorithm named“LBC-IoT”is proposed in this *** proposed block length is 32-bit supporting key lengths of 80-bit,and it is mainly based on the Feistel ***-efcient cryptographic features in“LBC-IoT”include the use of simple functions(shift,XOR)and small rigid substitution boxes(4-bit-S-boxes).Besides,it is immune to different types of attacks such as linear,differential,and side-channel as well as exible in terms of ***,LBC-IoT achieves reasonable performance in both hardware and software compared to other recent ***-IoT’s hardware implementation results are very promising(smallest ever area“548”GE)and competitive with today’s leading lightweight ***-IoT is also ideally suited for ultra-restricted devices such as RFID tags.

关键词： Security internet of things cryptographic algorithms block cipher lightweight algorithms

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Changes in Depression,Anxiety,and Stress Levels during a Religious Period:A Prospective Cohort Study

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International Journal of mental Health Promotion 2025年第1期27卷 41-49页

作者： ibrahim m.Gosadi Family and Community medicine Department Faculty of MedicineJazan UniversityJazan City45142Saudi Arabia

Objective:There is conflicting evidence suggesting an association between Ramadan and mental ***:This study aims to assess changes in depression,anxiety,and stress levels during Ramadan among university students from Saudi Arabia and to measure the magnitude of change in these levels according to ***:This study is a prospective cohort *** was collected using a structured questionnaire that measured demographic data of the students,and levels of depression,anxiety,and stress utilizing the short form of the Depression Anxiety Stress Scales questionnaire(DASS 21).The assessments were performed starting from the month of Shaban(the month that precedes Ramadan),and the second wave of data collection was initiated beginning the second week of Ramadan until the end of the *** in the proportion of students who are categorized as normal or having abnormal degrees of depression and anxiety between Shaban and Ramadan were tested using either the Chi-square test or Fisher’s exact ***:A total of 321 students completed the assessment during Shaban and *** than half of the students were male(54.2%),with a mean age of 22.A statistically significant di7fference in levels of anxiety,depression,and stress between the assessment periods was detected(pmal increased during Ramadan across all measured conditions in comparison to during *** reduction in the number of students classified as having anxiety,depression,and stress between the assessment periods remained statistically significant across both ***,degrees of change appear to be higher among male students than among female ***:This study identified a reduction in levels of depression,anxiety,and stress among students during the month of Ramadan,as well as gender variation concerning levels of *** results support the significance of considering social,religious,and spiritual aspec

关键词： Depression anxiety stress religion Ramadan

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Effects of rare-earth Pr3+-Dy3+ doping on structural,magnetic,optical and dielectric properties of Zn2Y hexaferrite

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Journal of Rare Earths 2025年第2期43卷 329-336页

作者： ibrahim mohammed mohamed E.El Sayed Ali Shawabkeh mohammad N.murshed Ibtehaj F.Alshdoukhi Zeinhom m.El-Bahy J.mohammed A.K.Srivastava Department of Physics Lovely Professional University Department of Science Technology Waziri Umaru Federal Polytechnic Birnin Kebbi Physics Department Faculty of Science and ArtsKing Khalid University College of Engineering and Technology American University of the Middle East Department of Basic Sciences College of Science and Health ProfessionsKing Saud Bin Abdulaziz University for Health ScienceKing Abdullah International Medical Research Center Department of Chemistry Faculty of ScienceAl-Azhar University Department of Physics Faculty of ScienceFederal University Dutse

This study was conducted to investigate the properties of Pr3+-Dy3+doped Zn2Y-type hexaferrite for potential technological applications.X-ray diffraction（XRD）,Fourier transform infrared spectroscopy（FTIR） and field-emission scanning electron microscopy（FESEm） were used to analyze structural *** crystallite size in the synthesized samples varies between 57.54 and 68.57 *** vibrational bands at 400 and 600 cm-1,common to all hexaferrites,were confirmed through *** FESEm analysis reveals an agglomeration of magnetic grains and a decrease in the average grain size from 1.24 to1.06 μ*** m-H loops show that,with x values of 0.0,0.1,and 0.2,the saturation magnetization is determined to be 34.76,34.23,and 32.52 emu/g,*** corresponding coercivity values are21.24,30.39,and 33.99 ***-visible spectroscopy using Tauc theory reveals an increase in the optical band gap from 2.32 to 2.50 eV,indicating a tunable energy band structure by incorporating Pr3+-Dy3+*** dielectric constant increases,whereas AC conductivity decreases with increased Pr3+-Dy3+*** obtained results suggest the potential suitability of these materials for various technological applications.

关键词： Dielectric constant magnetic hysteresis Optical band gap Pr3+-Dy3+ Rare earths Zn2Y-type hexaferrite

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migration of existing software systems to mobile computing platforms:a systematic mapping study

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Frontiers of Computer Science 2021年第2期15卷 13-37页

作者： Ibrahim.alseadoon Aakash AHmAD Adel ALKHALIL Khalid SULTAN College of Computer Science and Engineering University of Ha’ilHa’il2440Saudi Arabia College of Engineering and Applied Sciences American University of KuwaitSalmiya13034Kuwait

mobile computing has fast emerged as a pervasive technology to replace the old computing paradigms with portable computation and context-aware *** software systems can be migrated(while preserving their data and logic)to mobile computing platforms that support portability,context-sensitivity,and enhanced *** recent years,some research and development efforts have focused on a systematic migration of existing software systems to mobile computing *** investigate the research state-of-the-art on the migration of existing software systems to mobile computing *** aim to analyze the progression and impacts of existing research,highlight challenges and solutions that reflect dimensions of emerging and futuristic *** followed evidence-based software engineering(EBSE)method to conduct a systematic mapping study(SmS)of the existing research that has progressed over more than a decade(25 studies published from 1996–2017).We have derived a taxonomical classification and a holistic mapping of the existing research to investigate its progress,impacts,and potential areas of futuristic research and *** SmS has identified three types of migration namely Static,Dynamic,and State-based migration of existing software systems to mobile computing *** to mobile computing platforms enables existing software systems to achieve portability,context-sensitivity,and high ***,mobile systems may face some challenges such as resource poverty,data security,and *** emerging and futuristic research aims to support patterns and tool support to automate the migration *** results of this SmS can benefit researchers and practitioners-by highlighting challenges,solutions,and tools,etc.,-to conceptualize the state-of-the-art and futuristic trends that support migration of existing software to mobile computing.

关键词： evidence-based software engineering mapping study software evolution mobile computing

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Assessing Stress Tolerance of SUBI and DRO1 Introgression Lines under Flooding and Drought Conditions at Different Growth Stages

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Phyton-International Journal of Experimental Botany 2025年第2期94卷 303-316页

作者： ibrahim Soe Emmanuel Odama Alex Tamu Aquilino Lado Legge Wani Taiichiro Ookawa Abdelbagi m.Ismail Jun-Ichi Sakagami The United Graduate School of Agricultural Sciences Kagoshima UniversityKagoshima890-8580Japan Sierra Leone Agricultural Research Institute FreetownPMB 1313Sierra Leone National Agricultural Research Organization Abi Zonal Agricultural Researchand Development InstituteEntebbeP.O.Box 295Uganda Directorate of Research and Training Ministry of Agriculture and Food SecurityJubaP.O.Box 33Republic of South Sudan Institute of Agriculture Tokyo University of Agriculture and TechnologyTokyo156-8502Japan International Rice Research Institute Africa OfficeNairobiP.O.Box 30709Kenya Faculty of Agriculture Kagoshima UniversityKagoshima890-0065Japan

Rice varieties tolerant to submergence regulate shoot elongation during short-term submergence by expressing the SUB1A *** contrast,the deep-rooted DRO1 is effectively expressed under drought conditions to enhance water and nutrient *** study investigates the growth and yield of rice with both SUB1A and DRO1 in the background of IR64,under early-season flooding,and mid-season *** study used a randomized complete design with two factors:soil moisture treatments(submergence,drought,and their combination)and *** genotypes included IR64,and three near-isogenic lines(NILs):NIL-SUB1DRO1,NIL-SUB1,and *** submergence was imposed for 7 days on 14-day-old seedlings,while drought was imposed on control and submerged plants following a 21-day recovery period from submergence,using 42-day-old *** were measured before and after treatments(submergence and drought),and at harvest or grain *** stresses negatively affected the *** harvest,IR64 and NIL-SUB1DRO1 under both stresses showed a significant reduction in tiller numbers,shoot dry weights,and yields compared to their control ***64 exhibited a significant delay in reaching flowering under all *** rice introgression lines showed significant improvements in tolerance to the *** study showed no negative consequences of combining drought and submergence tolerance in rice.

关键词： Drought deep rooting flooding NIL-SUB1DRO1 rice yield submergence tolerance submergence+drought

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Superiority of Strontium-Doped Barium Titanate as an Electron Transport for Perovskite Solar Cells for Enhanced Efficiency and Thermal Stability

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Transactions of Tianjin University 2025年第01期31卷 42-63页

作者： minhaz mahmood mohammad Tariqul Islam md Samiul Islam Sakhr m.Sultan Kashfia Noor m.A.Islam K.Sopian Abdullah Alghafis mohd Adib ibrahim K.Sobayel Department of Electrical Electronic and Systems EngineeringUniversiti Kebangsaan Malaysia (UKM) Solar Energy Research Institute (SERI) Universiti Kebangsaan Malaysia (UKM) Department of Electrical Engineering Faculty of EngineeringUniversiti Malaya Department of mechanical Engineering Universiti Teknologi Petronas Department of mechanical Engineering College of EngineeringQassim University

This study presents a detailed comparative analysis of three electron transport layer（ETL） materials for perovskite solar cells（PSCs）,namely titanium dioxide（TiO2）,barium titanate（BaTiO3or BTO）,and strontium-doped barium titanate(Ba1-xSrxTiO3or BST),and their impact on the quantum efficiency（QE） and power conversion efficiency（PCE） of CH3NH3PbI3（mAPbI3） *** optimized structure demonstrates that devices utilizing BST as an ETL achieved the highest PCE of 29.85%,exhibiting superior thermal stability with the lowest temperature coefficient of-0.43%/*** temperature-induced degradation is comparable to that of commercially available silicon ***,BST-based ETLs show 29.50% and 26.48% higher PCE than those of TiO2-based and BTO-based *** enhanced internal QE and favorable current density-voltage（J-V） characteristics of BST compared with those of TiO2and BTO are attributed to its improved charge carrier separation,reduced recombination rates,and robust electrical characteristics under varied environmental ***,the electric field and generation rate of the BST-based ETLs show a more favorable distribution than those of the TiO2-based and BTO-based *** findings provide significant insights into the role of different ETLs in enhancing QE,indicating that BST is a superior ETL that enhances both the efficiency and stability of *** study contributes to the understanding of how perovskite-structured ETLs can be used to design and optimize highly efficient and stable photovoltaic devices.

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An efficient nano-adsorbent via surfactants/dual surfactants assisted ultrasonic co-precipitation method for sono-removal of monoazo and diazo anionic dyes

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Chinese Journal of Chemical Engineering 2021年第12期34卷 225-236页

作者： marwa m.ibrahim Department of Chemistry Faculty of EducationAin Shams UniversityRoxy 11711CairoEgypt

To preserve the environment for civilization,we should remove the pollutants like toxic dyes by friendly and cost efficacious *** this study,the effect of surfactants or mixed surfactants on physicochemical,optical and adsorption properties of ternary mixed oxide CeO_(2)-ZrO_(2)-Al_(2) O_3(CZA) are *** ternary mixed oxide CZA was prepared by surfactants or mixed surfactants assisted ultrasonic coprecipitation *** physicochemical and optical properties are estimated by different techniques like XRD,TEm,EDX,FTIR,S_(BET) and UV-Vis/*** CZA_T and CZA_C have hybrid shapes and high surface *** adsorption properties of ternary mixed oxides adsorbents were characterized by sono-removing anionic dyes such as Congo red(CR) and Remazol red RB-133(RR).The different factors like contact time,different dye concentrations and temperatures also *** kinetics and isotherms applications showed that,the adsorption process was followed pseudo second order kinetics and the Freundlich isotherm ***,the adsorption is spontaneous and endothermic process through the thermodynamic ***,the results showed that the ternary mixed oxide nano-adsorbent(CeO_(2)-ZrO_(2)-Al_(2) O_3) is promising and functional materials for anionic dye sweep from wastewater.

关键词： CeO_(2)-ZrO_(2)-Al_(2)O_3 Surfactants Ultrasonic co-precipitation method Optical properties Wastewater Adsorption

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Geological, Engineering Geological and Hydrogeological Characteristics of the Knowledge Economic City, Al madinah Al munawwarah, KSA

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Geomaterials 2025年第1期15卷 40-55页

作者： mutasim A. m. Ez Eldin Tareq Saeid Al Zahrani Gabel Zamil Al-Barakati ibrahim mohamed AlHarthi marwan mohamed Al Saikhan Waleed Abdel Aziz Al Aklouk Waheed mohamed Saeid Ba Amer Programme of Engineering Geology Center of Applied Geology Saudi Geological Survey Jeddah Kingdom of Saudi Arabia Department of Engineering Geology College of Petroleum Geology and Minerals University of Bahri Khartoum Sudan Zamzam Studies and Research Center Saudi Geological Survey Jeddah Kingdom of Saudi Arabia

The Knowledge Economic City (KEC) of Al madinah Al munawwarah is one of the major projects and represents the cornerstone for the new development activities for Al madinah. The study area contains different geological units dominated by basalt and overlain by surface deposits. The surface soils vary in thickness and can be classified into well-graded SAND with silt and gravel (SW-Sm), silty SAND with gravel (Sm), silty GRAVEL with sand (Gm), and sandy SILTY clay (CL-mL). The subsurface soil obtained from the drilled boreholes can be classified into poorly graded GRAVEL (GP), well-graded GRAVEL with sand (GW), poorly graded GRAVEL with silt (GP-Gm), silty CLAYEY gravel with sand (GC-Gm), silty SAND with gravel (Sm), silt with SAND (mL), and silty CLAY with sand (CL-mL), sandy lean CLAY (CL), and lean CLAY (CL). The relative density of the deposit and the different gravel sizes intercalated with the soil influenced the Standard Penetration Test (SPT) values. The SPT N values are high and approach refusal even at shallow depths. The shallow refusal depth (0.10 to 0.90 m) of the Dynamic Cone Penetration Test (DCPT) was observed. Generally, the soil can be described as inactive with low plasticity and dense to very dense consistency. The basalt of the KEC site is characterized by slightly (W2) to highly (W4) weathering, their strength ranges from moderate (S4) to very strong (S2), and the Rock Quality Designation (RQD) ranges from very poor (R5) to excellent (R1). The engineering geological map of the KEC characterized the geoengineering properties of the soil and rock materials and classified them into many zones. The high sulphate (SO42−) and chloride (Cl−) contents in groundwater call for protective measures for foundation concrete. The current study revealed that geohazard(s) mitigation measures concerning floods, volcanic eruptions, and earthquakes should be considered.

关键词： Engineering Geology Knowledge Economic City Petrographic Description Rock and Soil Investigations

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molecular characterization of yolk proteins in the female crab Neptunus pelagicus(***-Edwards,1861) from the mediterranean Sea of Alexandria,Egypt

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Journal of Oceanology and Limnology 2020年第2期38卷 438-453页

作者： ibrahim G ELGHAZALY m Department of Zoology Faculty of ScienceAlexandria UniversityAlexandria 21547Egypt Department of Zoology Faculty of ScienceDamnhour UniversityEl Behara 22516Egypt

This study aimed to characterize the morphological changes in the ovary of the female crab Neptunus pelagicus and to identify specific fractions of vitelloginin and vitelline molecules during primary and secondary *** of the blue crab were collected from the mediterranean Sea of Alexandria monthly during *** and oocytes in primary and secondary vitellogenesis were detached and treated for histological *** polyacrylamide gel electrophoresis(PAGE)Bis-Tris Gels was applied to identify vitelloginin(VN)and vitelline(VL)*** Analyses were done by *** initial degenerate primers were built regarding the conserved amino acid domains of the yolk *** and secondary vitellogeneses consisted of 8 *** fraction with molecular weight 550 kDa was identified in the hemolymph in secondary *** protein fractions(VLI&VLII)were identified in secondary vitellogenic *** electrophoresis performed with extract of stage I oocyte showed two protein fractions with molecular weights 550 kDa and 460 *** stage II and III oocyte,4 subunits were presented of 180,195,140 and 120 kDa in VLI and 2 subunits with molecular weight of 110 kDa and 95 kDa in *** two fractions in stage V oocyte presented with molecular weights of 380 kDa and 360 *** blot analysis proved that both fractions were of four major polypeptide subunits with molecular weight of 180,125,90 and 85 kDa in each of the two *** hybridization signal obtained by the Northern blot was detected in the hepatopancreas during ovarian cycle and in the ovary during secondary *** result of the reverse transcription-polymerase chain reaction(RT-PCR)analysis showed that the mRNA that encodes the C-terminal region of the VN cDNA was found in the ovary in secondary vitellogenesis and in the hepatopancreas.

关键词： Neptunus pelagicus vitellogenesis vitelloginin and vitelline native polyacrylamide gel electrophoresis(PAGE)Bis-Tris Gels PAGE-SDS western blot analysis reverse transcription-polymerase chain reaction(RT-PCR)

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COVID-19 and Unemployment: A Novel Bi-Level Optimal Control model

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Computers, materials & Continua 2021年第4期67卷 1153-1167页

作者： ibrahim m.Hezam Department of Statistics and Operations Research College of SciencesKing Saud UniversityRiyadhSaudi Arabia Department of mathematics Ibb UniversityIbbYemen

Since COVID-19 was declared as a pandemic in march 2020,the world’s major preoccupation has been to curb it while preserving the economy and reducing *** paper uses a novel Bi-Level Dynamic Optimal Control model(BLDOC)to coordinate control between COVID-19 and *** COVID-19 model is the upper level while the unemployment model is the lower level of the bi-level dynamic optimal control *** BLDOC model’s main objectives are to minimize the number of individuals infected with COVID-19 and to minimize the unemployed individuals,and at the same time minimizing the cost of the containment *** use the modified approximation Karush–Kuhn–Tucker(KKT)conditions with the Hamiltonian function to handle the bi-level dynamic optimal control *** consider three control variables:The first control variable relates to government measures to curb the COVID-19 pandemic,i.e.,quarantine,social distancing,and personal protection;and the other two control variables relate to government interventions to reduce the unemployment rate,i.e.,employment,making individuals qualified,creating new jobs reviving the economy,reducing *** investigate four different cases to verify the effect of control *** results indicate that rather than focusing exclusively on only one problem,we need a balanced trade-off between controlling each.

关键词： Bi-level optimal control COVID-19 Hamiltonian function Karush-Kuhn-Tucker unemployment

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