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Price Prediction of Seasonal Items Using Time Series Analysis

Computer Systems Science & Engineering 2023年第7期46卷 445-460页

作者： ahmed salah Mahmoud Bekhit Esraa Eldesouky ahmed Ali ahmed Fathalla Faculty of Computers and Informatics Zagazig UniversitySharkeya44523Egypt Information Technology Department the University of Technology and Applied SciencesIbriOman School of Electrical and Data Engineering University of Technology SydneySydney2007Australia College of Computer Engineering and Sciences Prince Sattam Bin Abdulaziz UniversityAl-Kharj11942Saudi Arabia Computer Science Department Faculty of Computers and InformaticsSuez Canal UniversityIsmailia41522Egypt Higher Future Institute for Specialized Technological Studies Cairo3044Egypt Department of Mathematics Faculty of ScienceSuez Canal UniversityIsmailia41522Egypt

The price prediction task is a well-studied problem due to its impact on the business *** are several research studies that have been conducted to predict the future price of items by capturing the patterns of price change,but there is very limited work to study the price prediction of seasonal goods(e.g.,Christmas gifts).Seasonal items’prices have different patterns than normal items;this can be linked to the offers and discounted prices of seasonal *** lack of research studies motivates the current work to investigate the problem of seasonal items’prices as a time series *** proposed utilizing two different approaches to address this problem,namely,1)machine learning(ML)-based models and 2)deep learning(DL)-based ***,this research tuned a set of well-known predictive models on a real-life *** models are ensemble learning-based models,random forest,Ridge,Lasso,and Linear ***,two new DL architectures based on gated recurrent unit(GRU)and long short-term memory(LSTM)models are ***,the performance of the utilized ensemble learning and classic ML models are compared against the proposed two DL architectures on different accuracy metrics,where the evaluation includes both numerical and visual comparisons of the examined *** obtained results show that the ensemble learning models outperformed the classic machine learning-based models(e.g.,linear regression and random forest)and the DL-based models.

关键词： Deep learning price prediction seasonal goods time series analysis

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Blockchain Mobile Wallet with Secure Offline Transactions

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Computers, Materials & Continua 2023年第5期75卷 2905-2919页

作者： Raed Saeed Rasheed Khalil Hamdi Ateyeh Al-Shqeerat ahmed salah Ghorab Fuad Salama AbuOwaimer Aiman ahmed AbuSamra Faculty of Engineering Islamic University of GazaP.O.Box 108GazaPalestine Department of Computer Science College of ComputerQassim UniversityP.O.Box 52211BuraydahSaudi Arabia University College of Applied Sciences P.O.Box 1415GazaPalestine Palestine Technical College P.O.Box 6037Deir ElBalahPalestine

There has been an increase in the adoption of mobile payment systems worldwide in the past few ***,poor Internet connection in rural regions continues to be an obstacle to the widespread use of such *** top of that,there are significant problems with the currently available offline wallets;for instance,the payee cannot verify the number of coins received without access to the ***,it has been demonstrated that some existing systems are susceptible to false token generation,and some do not even permit the user to divide the offline token into smaller portions to be used as *** paper proposes a blockchainbased wallet system that provides a secure mobile payment service even if a user cannot access a reliable Internet *** approach relies on Bluetooth and digital signatures to establish and build a trust connection between the *** proposed solution overcomes the main limitations of existing systems that use offline transactions,such as the generation of fake offline tokens and the indivisibility of offline *** user buys Offline Tokens(OTs)from a server called an Offline Token Manager(OTM)to use them later to perform offline *** mobile device must store a single,signed offline token transaction to prevent fake *** the other hand,all offline transactions will be kept as a history in a particular local ***,when the receiver becomes online,it will send a convert request to the OTMto change the value of the OTs to the appropriate amount in real *** step requires a connection to the *** evaluate the effectiveness of the system,the Solidity programming language was used to develop a smart contract on the Ethereum blockchain with a backend application programming interface(API)and an android mobile *** proposed method has an advantage over other prominent wallets.

关键词： Mobile wallet blockchain smart contracts digital signature

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The Chinese Negotiation Style for Successful Project Procurement Management Implementation:Arab Perspective

The Chinese Negotiation Style for Successful Project Procure...

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作者： Noman salah ahmed Abdulwahab 山东大学

学位级别：硕士

随着“一带一路”建设的进一步开放,中国为阿中国际项目投资打开了许多机遇。因此,这些变化将导致参与商务谈判。为阿拉伯人和中国人创造国际项目的价值,需要充分综合对方的谈判风格。由于文化的原因,阿拉伯和中国人之间的差异是多方面... 详细信息

随着“一带一路”建设的进一步开放,中国为阿中国际项目投资打开了许多机遇。因此,这些变化将导致参与商务谈判。为阿拉伯人和中国人创造国际项目的价值,需要充分综合对方的谈判风格。由于文化的原因,阿拉伯和中国人之间的差异是多方面的,这影响了他们的谈判风格。因此,在进行国际项目时,影响项目成功的关键因素之一就是谈判。事实上,不了解参与方的谈判风格可能会导致冲突和失去投资机会。然而,在中国谈判风格领域,有关阿拉伯语研究的资料却十分匮乏。因此,本研究将仅从阿拉伯的角度,通过有效谈判所需的要素,这种过程,文化的影响和所采用的策略,来研究中国的商业谈判风格。成功谈判的指导方针从文献中提出,并通过两个阶段进行测试。首先,通过多个案例来比较文学与现实经验。其次,通过问卷调查来检验它的现实性和相关性。根据研究结果,我们将提出一项具有专业、学术和一般公众意义的建议,希望在与中国供应商谈判时对阿拉伯项目经理有用。

关键词：国际项目管理项目采购中国谈判方式阿拉伯视角

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Ultralong hydroxyapatite-based forward osmosis membrane for freshwater generation

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Frontiers of Chemical Science and Engineering 2024年第9期18卷 37-49页

作者： Mohamed Gamal Gomaa Hamdy Maamoun Abdel-Ghafar Francesco Galiano Francesca Russo Alberto Figoli El-Sayed Ali Abdel-Aal Abdel-Hakim Taha Kandil Bahaa ahmed salah Central Metallurgical Research and Development Institute(CMRDI) 11421 CairoEgypt Chemistry Department Faculty of ScienceHelwan University11795 CairoEgypt Institute on Membrane Technology(CNR-ITM) 87036 RendeItaly

Increasing global water shortages are accelerating the pace of membrane manufacturing,which generates many environmentally harmful *** challenges need a radical rethink of developing innovative membranes that can address freshwater production without generating environmentally harmful *** work utilized the synthesized ultra-long hydroxyapatite(UHA)by the solvothermal method using the green solvent oleic acid in preparing UHA-based forward osmosis *** membranes were developed using different loading ratios of graphene oxide(GO)by vacuum-assisted filtration *** prepared GO/UHA membranes were identified using X-ray diffraction,scanning electron microscope,Fourier-transform infrared spectroscopy,and X-ray photoelectron *** contact angle and pore size distribution were determined for the obtained GO/UHA *** obtained hierarchical porous structure in the prepared membranes with interconnected channels results in a stable water flux with reverse salt *** best water flux rate of 42±2 L·m^(–2)·h^(–1)was achieved using the 50 mg GO/UHA membrane,which is 3.3 times higher than the pristine membrane,and a reverse salt flux of 67 g·m^(-2)·h^(–1).The obtained results showed a promising capability of a new generation of sustainable inorganic-based membranes that can be utilized in freshwater generation by energy-efficient techniques such as forward osmosis.

关键词： forward osmosis ultra-long hydroxyapatite graphene oxide inorganic-based membrane

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Variability in the Content of 25α- and 25β-Steroidal Sapogenins among Thirty Morphologically Different Sudanese Seed Accessions of Fenugreek

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Journal of Life Sciences 2014年第9期8卷 744-757页

作者： Nour ahmed Osman salah ahmed Elhussein Marzougah Aziz Dager Albalawi Department of Chemistry University College at Alwajh University ofTabuk Tabuk 71491 Saudi Arabia Oilseed Chemistry Section National Oilseed Proc. Res. Inst. University of Gezira Wad-Medani Pb 020 Sudan

Seeds of Fenugreek （Trigonellafoenum-graecum L.）, an international spice commodity, are much consumed in Sudan as a food, for flavoring and as a folk-remedy for several ailments, together with local beliefs in nutraceutical benefits. The authors have noted an immense variability in colour and other morphological characters of Fenugreek seeds offered in local Sudanese markets and wondered whether this variability is extended to their chemical composition. Steroidal sapogenins are important chemical constituents of Fenugreek seeds in view of their potential as precursors for the commercial synthesis of steroid drugs and their continually revealed beneficial biological activities. In this study, thirty Sudanese Fenugreek seed accessions collected from different geographical regions in Sudan were analyzed for their 25α-, 25β- and total sapogenin content using a simple and specific infra-red spectroscopic method. The seed accessions exhibited much morphological variability particularly in outer seed coat color and size. Preparative TLC followed by gravimetric analysis showed that steroidal sapogenins, mostly diosgenin and yamogenin, represented more than 70% of the steroids of Fenugreek seeds. Infra-red spectroscopic analysis showed that total 25α-sapogenins （calculated as diosgenin） varied from 0.65% to 1.68%. Total 25β-sapogenin （calculated as yamogenin） varied from 0.38% to 2.03%. The content of total sapogenins （α ＋ β epimeric forms） varied between 1.24% and 3.0% of the oven-dry weight of seeds. β-sapogenins （mostly yamogenin） were dominant over α-sapogenins （diosgenin） in most Sudanese Fenugreek seed accessions.

关键词： Fenugreek seeds Trigonellafoenum-graecum steroidal sapogenins seed morphology variability.

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Outcome of Early Surgical Decompression in Traumatic Incomplete Spinal Cord Injury

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Open Journal of Modern Neurosurgery 2020年第3期10卷 353-363页

作者： Mohammed ahmed Eissa ahmed Elsharkawy Hieder Al-Shami Aya Ouf ahmed M. salah El-Din Department of Neurosurgery Cairo University Cairo Egypt Department of Neurosurgery Al-Ahly Bank Hospital Cairo Egypt School of Medicine Cairo University Cairo Egypt

Objectives: Central cord syndrome has been reported to occur with particular frequency among older persons with cervical spondylosis who sustain hyperextension neck injury. This study aims to determine the efficacy of early surgical decompression (within 24 hours) of traumatic central cord syndrome patients in comparison with conservative management for central cord syndrome to determine a line of management to these cases. Methods: 60 patients suffering from acute traumatic central cord syndrome with various neurological deficits were divided into 2 groups, group A (conservatively managed) and group B (surgically managed). Patients in group B were operated upon within 24 hr. of trauma by posterior decompression. Clinical assessment of each patient on admission, discharge and 3 months follow-ups was done using the ASIA Impairment Scale, FIM, Ashworth scale, bladder function, and neuropathic pain symptoms. Results: Data collected from both groups showed, group A (the conservative group) consisted of 22 male (73.3%) and 8 female subjects (26.6%) with a mean age of 57.5 years while in group B (surgical group) the sample consisted of 20 male (66.6%) and 10 female subjects (33.3%) with a mean age of 58.6 years. There was an improvement in our study—according to ASIA and FIM scales—in 8 patients of 30 (26.6%) in the conservative group. In the surgical group, improvement in 16 patients (53.3%). Conclusions: Early surgical decompression with laminectomy and duroplasty can be considered a reliable modality in the management of traumatic CCS and can effectively reduce the secondary injury of the spinal cord and consequent deterioration with less hospital stay.

关键词： Central Cord Syndrome “CCS” Early Surgical Decompression Laminectomy Duroplasty

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Predictive value of serum lactate dehydrogenase in diagnosis of septic shock in critical pediatric patients:A cross-sectional study

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Journal of Acute Disease 2021年第3期10卷 107-111页

作者： HebatAllah Fadel Algebaly ahmed Abd-Elal Rasha El Kaffas Elshymaa salah ahmed Pediatric Critical Care Department Cairo University School of MedicineEgypt Department of Clinical and Chemical Pathology Cairo University School of MedicineEgypt

Objectives:To determine the predictive value of lactate dehydrogenase(LDH)in the diagnosis of septic shock and its association with other prognostic scores in critical pediatric ***:A cross-sectional study was performed at Children’s Hospital of Cairo University between June 2019 and December 2019.A total of 200 pediatric patients were divided into the septic shock group[100 critically ill patients with septic shock from the pediatric intensive care unit(PICU)]and the control group(100 patients with only sepsis).LDH was determined in the first 24 hours of *** sensitivity and specificity of LDH in diagnosis of septic shock were assessed;the levels of related indicators of patients with different etiologies were compared;correlations between LDH,Paediatric Index of MortalityⅡ,and Pediatric Sequential Organ Failure Assessment(pSOFA)were ***:Median LDH was 512μL(406.50-663.00)in the septic shock group and was significantly higher than that[190μL(160.00-264.50)]in the control group(P<0.001).Besides,median LDH in children with chest infecion was higher than that in children with other diagnoses(P=0.047).A good positive correlation was found between pSOFA and LDH(r=0.503,P<0.001).Conclusions:LDH could be a potential inflammatory marker in the diagnosis of septic shock and is valuable for PICU admission decisions.

关键词： Lactate dehydrogenase Septic shock pSOFA

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Double J Fixation after Craniotomy: Technical Description of a Modification Method for Bone Flap Fixation (Hiederov Method)

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Open Journal of Modern Neurosurgery 2020年第3期10卷 318-324页

作者： Hieder Al-Shami ahmed M. salah Mohamed Fathy Adel Ali Al-Ahly Bank Hospital Cairo Egypt Department of Neurosurgery Faculty of Medicine Kasr-Alainy Medical School Cairo Egypt

Background: Fixation of bone flap following craniotomy is usually achieved by synthetic materials. In rural and poor funding areas, innovation for cheap, safe and applicable material is needed. Purpose: The aim is to assess our new innovative technique in bone flap fixation against traditional techniques. Patients and Methods: The study was a prospective randomized controlled study enrolled at Al-Amal Hospital and Al-Ahly Bank Hospital from 2014-2019. Forty-eight patients were randomized in the study. Group A (24 patients) underwent titanium miniplate fixation while group B (24 patients) underwent our new technique. The new technique is double J tunnels performed by craniotome on either side of the bone (flap and skull sides), then a Prolene suture is passed through the shared stem of J’ holes and secured in the wrapped side of J’s holes and tying it tightly. Both techniques were examined against fixation time, rigidity, offset and final judgment postoperatively. Result: There was no statistically significant difference in using both techniques as regard fixation time. Our new technique was not inferior to the traditional one in achieving rigidity (p > 0.05). The final postoperative assessment was as equal as that seen in miniplate fixation. Conclusion: This technique is a simple, easy, cheap and effective method of fixing craniotomy bone flap.

关键词： Craniotomy Bone Flap Fixation Miniplate Fixation

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Nano-Chitosan Loaded N Application for Improving Wheat Plants Yield: Impacts on Soil Nutrient Availability

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Journal of Agricultural Chemistry and Environment 2024年第4期13卷 384-395页

作者： Tarek salah ahmed Salem Elsayed Mohamed Elskhariy Abdelmonem Mahmoud Zayed ahmed Ibrahim Mohamed Noha Adel Mahgoub Egyptian Ministry of Agriculture Cairo Egypt

This work was held to study the effect of chitosan nanoparticles and loaded N on the wheat plants. A field study was conducted during the winter season 2021/2022 cultivated with wheat (Triticum aestivum L.) on sandy soil at the experimental unit of the Faculty of Agriculture farm-Suez Canal University-Ismailia-Egypt. Results may indicate that the application of foliar chitosan NPs.-loaded nitrogen in different concentrations has been employed to enhance plant growth and productivity, Nano-chitosan loaded with N (500 mg/L) yielded the most grains and was more effective than the control and nano-chitosan loaded N (250 mg/L, 750 mg/L).

关键词： Nano Fertilizer NPK Chitosan Wheat Sandy Soil

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Development of Health Literacy for Regular Hemodialysis Patients in Menoufia Governorate: A Cross-Sectional Study

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Open Journal of Nephrology 2021年第2期11卷 199-216页

作者： Said Sayed ahmed Khamis Mahmoud Mohammed Emara Marwa salah ahmed Elnashar Muhammad Abdul Mabood Khalil Zeinab A. Kasemy Department of Internal Medicine and Nephrology Faculty of Medicine Menoufia University Shibin El Kom Egypt Department of Internal Medicine and Nephrology Teaching Hospital Menoufia University Shibin El Kom Egypt Department of Renal Medicine Consultant Nephrologist RIPAS Hospital Bandar Seri Begawan Brunei Darussalam Department of Public Health and Community Medicine Faculty of Medicine Menoufia University Shibin El Kom Egypt

Health literacy (HL) is essential to access, comprehend, assess and use health data allowing patients to make better health and quality of life decisions. To assess the health literacy level of hemodialysis Egyptian patients, a cross-sectional study from March to September 2020 was conducted at 4 hemodialysis (HD) units on 439 patients. A translated questionnaire including demographic characteristics and health literacy components was conducted. This study adapted Nutbeam’s model incorporating critical health literacy, interactive health literacy, and functional health literacy. Health literacy of hemodialysis patients was satisfactory among 35.5% of the studied patients. The average total score of health literacy questionnaire was (15.53 ± 4.32) distributed as (2.90 ± 1.26) for functional literacy, (3.10 ± 1.26) for basic health knowledge, (1.65 ± 1.21) for communicative literacy, (2.53 ± 0.70) for interactive literacy, (1.75 ± 1.30) for advanced health knowledge, (1.74 ± 0.48) for critical literacy, and (1.83 ± 0.93) for patient safety. It was found that poor health literacy was associated with low income (OR = 2.54, CI 95%: 1.66_3.89, p p p p = 0.033). There was a prevalent low health literacy among the studied regular hemodialysis patients which was affected by education, age and income and in turn it affected the adherence to treatment. Understanding the linkage between HL and self-care attitudes should enhance efforts to improve hemodialysis outcomes.

关键词： Limited Health Literacy among Dialysis Patients Knowledge among Hemodialysis Patients Regular Hemodialysis

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