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  1. Book ; Online ; E-Book: 3D diagnosis and treatment planning in orthodontics

    Retrouvey, Jean Marc / Abdallah, Mohamed-Nur

    an atlas for the clinician

    2021  

    Abstract: Intro -- Introduction -- Contents -- Contributors -- Reviewers -- About the Editors -- Part I: Techniques Used in Orthodontic Diagnosis -- 1: Evolution of the Orthodontic Diagnosis in the Age of Artificial Intelligence -- 1.1 The Objectives of an ... ...

    Author's details Jean Marc Retrouvey, Mohamed-Nur Abdallah editors
    Abstract Intro -- Introduction -- Contents -- Contributors -- Reviewers -- About the Editors -- Part I: Techniques Used in Orthodontic Diagnosis -- 1: Evolution of the Orthodontic Diagnosis in the Age of Artificial Intelligence -- 1.1 The Objectives of an Orthodontic Diagnosis -- 1.2 Evolution of the Orthodontic Record Overtime -- 1.2.1 Examination Form -- 1.2.1.1 Dental Photographs -- 1.2.1.2 Panoramic Radiographs -- 1.2.1.3 Cephalometric Radiograph -- 1.2.1.4 Orthodontic Study Models -- 1.3 The Rationale for 3D Digital Orthodontic Records: A More Accurate Method to Analyze the Craniofacial Complex -- 1.3.1 Digital Photography -- 1.3.1.1 Cone Beam Radiography -- Reformatted Panoramic and Cephalometric Radiographs -- 3D Cephalometric Analysis -- 1.3.1.2 Intraoral Scanner and Digital Model -- STL 3D Digital Orthodontic Models and Software Programs to Analyze the Dentition -- 1.3.2 Integration of 3D Files: A Fusion of STL-DICOM -- 1.4 Introduction of Data Mining, Artificial Intelligence, and Machine Learning -- 1.5 Conclusions -- References -- 2: Use of Dental Photography in Orthodontic Diagnosis and Treatment Planning -- 2.1 Introduction -- 2.2 Components of Digital Dental Photography Equipment -- 2.2.1 Camera Body -- 2.2.2 Lens -- 2.2.3 Flash Unit -- 2.2.3.1 Built-In and Pop-Up Camera Flash -- 2.2.3.2 Ring Flash -- 2.2.3.3 Dual Point Flash Bracket (With or Without Bouncers) -- 2.2.4 Conclusions of the Rationale to Use DSLR Cameras, Macro Lenses, and External Flashes -- 2.3 Dental Photography Techniques -- 2.3.1 Extraoral Photography -- 2.3.1.1 Most Common Camera Settings for Portraiture Photography Used in Orthodontics -- 2.3.2 Intraoral Photography -- 2.3.3 The Application of Digital Photography in Orthodontics -- 2.3.3.1 Smile Arc Analysis -- 2.3.3.2 Digital Smile Design.
    Keywords Electronic books
    Language English
    Size 1 Online-Ressource (xi, 322 Seiten), Illustrationen
    Publisher Springer
    Publishing place Cham
    Publishing country Switzerland
    Document type Book ; Online ; E-Book
    Note Description based on publisher supplied metadata and other sources
    Remark Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
    HBZ-ID HT020879927
    ISBN 978-3-030-57223-5 ; 9783030572228 ; 3-030-57223-4 ; 3030572226
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Article ; Online: More efficient estimators of the area under the receiver operating characteristic curve in paired ranked set sampling.

    Abdallah, Mohamed S

    Statistical methods in medical research

    2023  Volume 32, Issue 6, Page(s) 1217–1233

    Abstract: Receiver operating characteristic is a beneficial technique for evaluating the performance of a binary classification. The area under the curve of the receiver operating characteristic is an effective index of the accuracy of the classification process. ... ...

    Abstract Receiver operating characteristic is a beneficial technique for evaluating the performance of a binary classification. The area under the curve of the receiver operating characteristic is an effective index of the accuracy of the classification process. While nonparametric point estimation has been well-studied under the ranked set sampling, it has received little attention under ranked set sampling variations. In order to set out to fill this gap, this article deals with the problem of estimating the area under the curve of the receiver operating characteristic based on paired ranked set sampling. New estimators of the area under the curve of the receiver operating characteristic based on paired ranked set sampling are proposed. Using the information supported by the concomitant variable, the additional area under the curve of the receiver operating characteristic estimators based on ranked set sampling as well as paired ranked set sampling are also introduced. It is shown either theoretically or numerically that the proposed estimators are consistent under the perfectness situation. It emerges that the concomitant-based estimators are shown to be superior to their competitors provided that the perfect assumption is not sharply violated. In contrast, kernel-based estimators are significantly superior relative to their rivals regardless of the quality of ranking. Finally, the application of the proposed procedures is also demonstrated by using empirical datasets in the context of medicine.
    MeSH term(s) ROC Curve ; Area Under Curve
    Language English
    Publishing date 2023-04-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 1136948-6
    ISSN 1477-0334 ; 0962-2802
    ISSN (online) 1477-0334
    ISSN 0962-2802
    DOI 10.1177/09622802231167434
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Modeling of corona virus and its application in confocal microscopy.

    Hamed, Abdallah Mohamed

    Beni-Suef University journal of basic and applied sciences

    2022  Volume 11, Issue 1, Page(s) 98

    Abstract: Background: The proposal of spiky apertures showed resolution improvement compared with the circular apertures. Three models of corona virus are given. The 1st model consists of uniform circular aperture provided with 8 spikes while the 2nd model has 16 ...

    Abstract Background: The proposal of spiky apertures showed resolution improvement compared with the circular apertures. Three models of corona virus are given. The 1st model consists of uniform circular aperture provided with 8 spikes while the 2nd model has 16 spikes for the same uniform circular aperture. The 3rd model has circular linear distribution with 8 spikes.
    Results: The Normalized Point Spread Function (PSF) or the impulse response is computed for the three models using fast Fourier transform technique. In addition, the autocorrelation function corresponding to these apertures is calculated and compared with that corresponding to the ordinary circular and conic apertures. Coronavirus image is used as an object in the formation of images using confocal scanning laser microscope provided with suggested models. The fabricated MATLAB code is used to compute and plot all images and line plots.
    Conclusions: The PSF plots are computed from Eqs. (8) and (12) using MATLAB code showing narrower cutoff in the PSF for spiky aperture compared with that corresponding to the uniform circular aperture and modulated linear and quadratic apertures. Hence, I reached resolution improvement in the case of spiky aperture.
    Language English
    Publishing date 2022-08-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 2768279-1
    ISSN 2314-8543 ; 2314-8535 ; 2314-8543
    ISSN (online) 2314-8543
    ISSN 2314-8535 ; 2314-8543
    DOI 10.1186/s43088-022-00276-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Modeling of corona virus and its application in confocal microscopy

    Abdallah Mohamed Hamed

    Beni-Suef University Journal of Basic and Applied Sciences, Vol 11, Iss 1, Pp 1-

    2022  Volume 12

    Abstract: Abstract Background The proposal of spiky apertures showed resolution improvement compared with the circular apertures. Three models of corona virus are given. The 1st model consists of uniform circular aperture provided with 8 spikes while the 2nd model ...

    Abstract Abstract Background The proposal of spiky apertures showed resolution improvement compared with the circular apertures. Three models of corona virus are given. The 1st model consists of uniform circular aperture provided with 8 spikes while the 2nd model has 16 spikes for the same uniform circular aperture. The 3rd model has circular linear distribution with 8 spikes. Results The Normalized Point Spread Function (PSF) or the impulse response is computed for the three models using fast Fourier transform technique. In addition, the autocorrelation function corresponding to these apertures is calculated and compared with that corresponding to the ordinary circular and conic apertures. Coronavirus image is used as an object in the formation of images using confocal scanning laser microscope provided with suggested models. The fabricated MATLAB code is used to compute and plot all images and line plots. Conclusions The PSF plots are computed from Eqs. (8) and (12) using MATLAB code showing narrower cutoff in the PSF for spiky aperture compared with that corresponding to the uniform circular aperture and modulated linear and quadratic apertures. Hence, I reached resolution improvement in the case of spiky aperture.
    Keywords Corona virus ; Confocal laser microscope ; Spiky circular apertures ; Impulse response ; Medicine (General) ; R5-920 ; Science ; Q
    Language English
    Publishing date 2022-08-01T00:00:00Z
    Publisher SpringerOpen
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Book ; Online: Tailoring Semantic Communication at Network Edge

    Albaseer, Abdullatif / Abdallah, Mohamed

    A Novel Approach Using Dynamic Knowledge Distillation

    2024  

    Abstract: Semantic Communication (SemCom) systems, empowered by deep learning (DL), represent a paradigm shift in data transmission. These systems prioritize the significance of content over sheer data volume. However, existing SemCom designs face challenges when ... ...

    Abstract Semantic Communication (SemCom) systems, empowered by deep learning (DL), represent a paradigm shift in data transmission. These systems prioritize the significance of content over sheer data volume. However, existing SemCom designs face challenges when applied to diverse computational capabilities and network conditions, particularly in time-sensitive applications. A key challenge is the assumption that diverse devices can uniformly benefit from a standard, large DL model in SemCom systems. This assumption becomes increasingly impractical, especially in high-speed, high-reliability applications such as industrial automation or critical healthcare. Therefore, this paper introduces a novel SemCom framework tailored for heterogeneous, resource-constrained edge devices and computation-intensive servers. Our approach employs dynamic knowledge distillation (KD) to customize semantic models for each device, balancing computational and communication constraints while ensuring Quality of Service (QoS). We formulate an optimization problem and develop an adaptive algorithm that iteratively refines semantic knowledge on edge devices, resulting in better models tailored to their resource profiles. This algorithm strategically adjusts the granularity of distilled knowledge, enabling devices to maintain high semantic accuracy for precise inference tasks, even under unstable network conditions. Extensive simulations demonstrate that our approach significantly reduces model complexity for edge devices, leading to better semantic extraction and achieving the desired QoS.

    Comment: Accepted for the International Conference on Communications (ICC) 2024
    Keywords Computer Science - Networking and Internet Architecture
    Subject code 006
    Publishing date 2024-01-18
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Prevalence of malaria infection and factors associated among HIV-infected adult patients attending HIV care and treatment clinic at Kitete regional referral hospital in Tabora region, Tanzania

    Hamad Nnimbo / Doreen Kamori / Nsiande Lema / Abdallah Mohamed

    Bulletin of the National Research Centre, Vol 47, Iss 1, Pp 1-

    a cross-sectional study

    2023  Volume 12

    Abstract: Abstract Background HIV and malaria are serious public health concerns, particularly in Tanzania. HIV-infected individuals are more likely to get malaria and its complications. However, data on the interaction of the two diseases in Tanzania are limited. ...

    Abstract Abstract Background HIV and malaria are serious public health concerns, particularly in Tanzania. HIV-infected individuals are more likely to get malaria and its complications. However, data on the interaction of the two diseases in Tanzania are limited. This cross-sectional study aimed to determine the prevalence of malaria infection and associated factors among HIV-infected adults attending HIV care and treatment clinic at Kitete regional referral hospital in Tabora region, Tanzania. Methodology The cross-sectional study was carried out between March and May 2022 at Kitete regional referral hospital in Tanzania. A total of 246 HIV-infected adults were selected by systematic random sampling. Malaria was diagnosed using both malaria rapid diagnostic test (mRDT) and malaria microscopy. Social demographic data were collected using a structured questionnaire, while clinical history and laboratory parameters were extracted from patients’ files. Data were analyzed using STATA version 15.1, and a p value < 0.05 was considered statistically significant. The study included consenting HIV+ adults and excluded pregnant women and recent antimalarial users. Results Twenty-six out of 242 participants 10.7% (95% CI 6.9–15.6%) tested positive for malaria using mRDT, while 20 out of 242 participants 8.3% (95% CI 4.9–13.1%) tested positive for malaria using blood smear for malaria microscopy. Independent factors associated with malaria infection were living in rural areas (aOR = 2.81, 95% CI = 1.06–7.45, p = 0.038), poor adherence to anti-retroviral therapy (aOR = 3.66, 95% CI = 1.04–12.7, p = 0.043), HIV viral load of ≥ 1000 copies/mL (aOR = 3.2, 95% CI = 1.00–10.5, p = 0.02, CD4 count ≤ 350 cells/µL (aOR = 2.8, 95% CI = 1.10–7.30, p = 0.03), while using mosquito nets (aOR = 0.27, 95% CI = 0.08–0.90, p = 0.033) and receiving health education (aOR = 0.26, 95% CI = 0.09–0.71, p = 0.009) were protective factors. Conclusions The study reveals a concerning prevalence of malaria infection among adult HIV patients at Kitete ...
    Keywords HIV ; Malaria ; Prevalence ; Tanzania ; Science ; Q
    Subject code 616
    Language English
    Publishing date 2023-12-01T00:00:00Z
    Publisher SpringerOpen
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article: Acute Pancreatitis Revealing a Diagnosis of Diffuse Large B-Cell Lymphoma.

    Herman, Tessa / Wilson, Natalie / Abdallah, Mohamed / Bilal, Mohammad / Nemat, Hashim

    ACG case reports journal

    2024  Volume 11, Issue 4, Page(s) e01320

    Abstract: Acute pancreatitis is a common gastroenterological condition that can occur due to several causes. While not required for diagnosis, imaging is often performed and may reveal unexpected findings such as pancreatic masses. Malignancies such as lymphoma ... ...

    Abstract Acute pancreatitis is a common gastroenterological condition that can occur due to several causes. While not required for diagnosis, imaging is often performed and may reveal unexpected findings such as pancreatic masses. Malignancies such as lymphoma are uncommon causes of acute pancreatitis, especially as the initial presentation of malignancy. We present a case of a young patient with acute pancreatitis caused by diffuse large B-cell lymphoma with extranodal disease secondarily involving the pancreas. Our case highlights the importance of keeping a broad differential for acute pancreatitis and considering rare etiologies such as pancreatic lymphoma in patients without another obvious culprit.
    Language English
    Publishing date 2024-03-28
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2814825-3
    ISSN 2326-3253
    ISSN 2326-3253
    DOI 10.14309/crj.0000000000001320
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Assessment of human dermal absorption of flame retardant additives in polyethylene and polypropylene microplastics using 3D human skin equivalent models.

    Akpojevwe Abafe, Ovokeroye / Harrad, Stuart / Abou-Elwafa Abdallah, Mohamed

    Environment international

    2024  Volume 186, Page(s) 108635

    Abstract: To overcome ethical and technical challenges impeding the study of human dermal uptake of chemical additives present in microplastics (MPs), we employed 3D human skin equivalent (3D-HSE) models to provide first insights into the dermal bioavailability of ...

    Abstract To overcome ethical and technical challenges impeding the study of human dermal uptake of chemical additives present in microplastics (MPs), we employed 3D human skin equivalent (3D-HSE) models to provide first insights into the dermal bioavailability of polybrominated diphenyl ether (PBDEs) present in MPs; and evaluated different factors influencing human percutaneous absorption of PBDEs under real-life exposure scenario. PBDEs were bioavailable to varying degrees (up to 8 % of the exposure dose) and percutaneous permeation was evident, albeit at low levels (≤0.1 % of the exposure dose). While the polymer type influenced the release of PBDEs from the studied MPs to the skin, the polymer type was less important in driving the percutaneous absorption of PBDEs. The absorbed fraction of PBDEs was strongly correlated (r
    MeSH term(s) Humans ; Flame Retardants ; Skin Absorption ; Halogenated Diphenyl Ethers/pharmacokinetics ; Polypropylenes ; Microplastics ; Polyethylene ; Skin/metabolism ; Models, Biological
    Chemical Substances Flame Retardants ; Halogenated Diphenyl Ethers ; Polypropylenes ; Microplastics ; Polyethylene (9002-88-4)
    Language English
    Publishing date 2024-04-05
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 554791-x
    ISSN 1873-6750 ; 0160-4120
    ISSN (online) 1873-6750
    ISSN 0160-4120
    DOI 10.1016/j.envint.2024.108635
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Supplemental Sewage Scum and Organic Municipal Solid Waste Addition to the Anaerobic Digestion of Thickened Waste Activated Sludge: Biomethane Potential and Microbiome Analysis

    Aromolaran, Adewale / Sartaj, Majid / Abdallah, Mohamed

    Fermentation. 2023 Feb. 28, v. 9, no. 3

    2023  

    Abstract: Sewage scum (SS) is collected from sedimentation tanks in wastewater treatment plants (WWTPs). Despite its huge biogas potential, there is limited information on its potential as a co-substrate and microbial ecology, especially during anaerobic co- ... ...

    Abstract Sewage scum (SS) is collected from sedimentation tanks in wastewater treatment plants (WWTPs). Despite its huge biogas potential, there is limited information on its potential as a co-substrate and microbial ecology, especially during anaerobic co-digestion (ACo-D) of the organic fraction of municipal solid waste (OFMSW) and thickened waste activated sludge (TWAS). In this biomethane potential (BMP) study, the bioenergy yield achieved by the supplemental addition of SS and OFMSW to TWAS was investigated, along with the microbial ecology. Compared with the digestion of TWAS alone, which produced 184.6 mLCH4 gVS⁻¹, biomethane yield was enhanced by as much as 32.4–121.6% in trinary mixtures with SS and OFMSW, mainly due to the positive synergistic effect. Furthermore, a mixture of 40%SS + 10%TWAS + 50%OFMSW produced the highest biogas yield of 407 mLCH₄ gVS⁻¹, which is proof that existing WWTPs can produce additional energy by incorporating external bioresources, thereby reducing greenhouse gas emissions. Modified Gompertz and logistic function estimates showed that methane production rate improved by as much as 60% in a trinary mixture compared with the digestion of TWAS alone. The genus Methanosaeta, capable of generating methane by the acetoclastic methanogenic pathway among all the archaeal communities, was the most prominent, followed by hydrogenotrophic methanogen Methanospirillum.
    Keywords Methanosaeta ; activated sludge ; anaerobic digestion ; biogas ; energy ; fermentation ; greenhouse gases ; methane ; methane production ; methanogens ; microbial ecology ; microbiome ; municipal solid waste ; sewage ; synergism ; wastewater treatment
    Language English
    Dates of publication 2023-0228
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2813985-9
    ISSN 2311-5637
    ISSN 2311-5637
    DOI 10.3390/fermentation9030237
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: Dermal bioaccessibility of perfluoroalkyl substances from household dust; influence of topically applied cosmetics

    Ragnarsdóttir, Oddný / Abdallah, Mohamed Abou-Elwafa / Harrad, Stuart

    Environmental Research. 2023 Dec., v. 238 p.117093-

    2023  

    Abstract: PFAS are known contaminants of indoor dust. Despite the adherence of such dust to skin, the dermal penetration potential of PFAS is not well understood. By applying in vitro physiologically based extraction tests, the bioaccessibility of 17 PFAS from ... ...

    Abstract PFAS are known contaminants of indoor dust. Despite the adherence of such dust to skin, the dermal penetration potential of PFAS is not well understood. By applying in vitro physiologically based extraction tests, the bioaccessibility of 17 PFAS from indoor dust to synthetic human sweat sebum mixtures (SSSM) was assessed. The composition of the SSSM substantially impacted the bioaccessibility of all target compounds. PFAS bioaccessibility in a 1:1 sweat:sebum mixture ranged from 54 to 92% for perfluorocarboxylic acids (PFCAs) and 61–77% for perfluorosulfonic acids (PFSAs). Commonly applied cosmetics (foundation, sunscreen, moisturiser, and deodorant) significantly impacted the dermal bioaccessibility of target PFAS, e.g., the presence of moisturiser significantly decreased the total bioaccessibility of both PFCAs and PFSAs. Preliminary human exposure estimates revealed dermal contact with indoor dust could contribute as much as pathways such as drinking water and dust ingestion to an adult's daily intake of PFAS. While further research is needed to assess the percutaneous penetration of PFAS in humans, the current study highlights the potential substantial contribution of dermal exposure to human body burdens of PFAS and the need for further consideration of this pathway in PFAS risk assessment studies.
    Keywords adults ; bioavailability ; deodorants ; dermal exposure ; dust ; humans ; perfluorocarbons ; risk assessment ; sebum ; sunscreens ; sweat ; topical application ; PFAS ; Bioaccessibility ; Cosmetics ; Indoor dust
    Language English
    Dates of publication 2023-12
    Publishing place Elsevier Inc.
    Document type Article ; Online
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2023.117093
    Database NAL-Catalogue (AGRICOLA)

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