LIVIVO - Search results -

Search results

Result 1 - 10 of total 867

Search options

Article ; Online: MPPT control of a solar pumping system based five-phase impedance source inverter fed induction motor.

Hassan, Ahmed M / Hassan, Abd El-Wahab / Elbarbary, Z M S / Al-Gahtani, Saad F / Omar, Ahmed I / Metwally, Mohamed Eladly

PloS one

2024 Volume 19, Issue 1, Page(s) e0295365

Abstract: This paper presents a control method for a system composed of a photovoltaic (PV) array, five-phase impedance source inverter, five-phase induction motor and centrifugal pump. This method is based on controlling the motor speed to control the pump power ... ...

Abstract	This paper presents a control method for a system composed of a photovoltaic (PV) array, five-phase impedance source inverter, five-phase induction motor and centrifugal pump. This method is based on controlling the motor speed to control the pump power as the insolation level or temperature change to attain the maximum power extraction from the PV-array. The motor speed is controlled by using artificial neural network (ANN) which is trained to provide the desired inverter frequency and modulation index at any insolation level and temperature to attain the maximum PV operating power. The data of the neural network are based on the operation of the induction motor at constant air gap flux and perturb and observe method for maximum power point tracking. Simulation results are obtained using MATLAB Simulink to verify the proposed control method.
MeSH term(s)	Algorithms ; Electric Impedance ; Electric Power Supplies ; Computer Simulation ; Neural Networks, Computer
Language	English
Publishing date	2024-01-18
Publishing country	United States
Document type	Journal Article
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0295365
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Article: Recent advances in PGPR-mediated resilience toward interactive effects of drought and salt stress in plants.

Al-Turki, Ahmad / Murali, M / Omar, Ayman F / Rehan, Medhat / Sayyed, R Z

Frontiers in microbiology

2023 Volume 14, Page(s) 1214845

Abstract: The present crisis at hand revolves around the need to enhance plant resilience to various environmental stresses, including abiotic and biotic stresses, to ensure sustainable agriculture and mitigate the impact of climate change on crop production. One ... ...

Abstract	The present crisis at hand revolves around the need to enhance plant resilience to various environmental stresses, including abiotic and biotic stresses, to ensure sustainable agriculture and mitigate the impact of climate change on crop production. One such promising approach is the utilization of plant growth-promoting rhizobacteria (PGPR) to mediate plant resilience to these stresses. Plants are constantly exposed to various stress factors, such as drought, salinity, pathogens, and nutrient deficiencies, which can significantly reduce crop yield and quality. The PGPR are beneficial microbes that reside in the rhizosphere of plants and have been shown to positively influence plant growth and stress tolerance through various mechanisms, including nutrient solubilization, phytohormone production, and induction of systemic resistance. The review comprehensively examines the various mechanisms through which PGPR promotes plant resilience, including nutrient acquisition, hormonal regulation, and defense induction, focusing on recent research findings. The advancements made in the field of PGPR-mediated resilience through multi-omics approaches (
Language	English
Publishing date	2023-09-27
Publishing country	Switzerland
Document type	Journal Article ; Review
ZDB-ID	2587354-4
ISSN	1664-302X
ISSN	1664-302X
DOI	10.3389/fmicb.2023.1214845
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Colonic mucinous adenocarcinoma in a pregnant woman presented as pseudo Sister Mary Joseph's nodule: A case report.

Tarik, I A / Henry, F J / Shabery, N A / Omar, Z / Ibrahim, O E

The Medical journal of Malaysia

2022 Volume 77, Issue 2, Page(s) 258–260

Abstract: We report a case of a 41-year-old pregnant woman who initially presented with a sub-umbilical lump, for nearly five months. Subsequently, an ultrasound study was performed, and the patient underwent a surgical drainage operation for a presumed ... ...

Abstract	We report a case of a 41-year-old pregnant woman who initially presented with a sub-umbilical lump, for nearly five months. Subsequently, an ultrasound study was performed, and the patient underwent a surgical drainage operation for a presumed inflammatory condition, at the periumbilical region. The patient returned after a week post-drainage with a faecal discharging fistula. One month later, the patient had an emergency lower caesarean section plus bilateral tubal ligation because of the transverse lie of the foetus. Onemonth post-operative caesarean section, the fistula opening showed a big protruding ulcerating mass. En-bloc resection of the transverse and the descending colon was performed, and the histopathologic diagnosis showed a moderately differentiated mucinous adenocarcinoma. This case highlights that a high index of suspicion was recommended in an unresolved periumbilical lump (pseudo Sister Mary Joseph's nodule), and periumbilical metastasis of colorectal cancer frequently indicates advanced disease and poor prognosis. In view of its rarity of occurrence and limited experience, in the management of an ambiguous case, we report this case.
MeSH term(s)	Adenocarcinoma, Mucinous/diagnosis ; Adenocarcinoma, Mucinous/pathology ; Adenocarcinoma, Mucinous/surgery ; Adult ; Cesarean Section ; Colonic Neoplasms/diagnosis ; Colonic Neoplasms/pathology ; Colonic Neoplasms/surgery ; Female ; Humans ; Pregnancy ; Pregnant Women ; Sister Mary Joseph's Nodule/diagnosis ; Sister Mary Joseph's Nodule/secondary ; Sister Mary Joseph's Nodule/surgery ; Umbilicus/pathology
Language	English
Publishing date	2022-03-25
Publishing country	Malaysia
Document type	Case Reports ; Journal Article
ZDB-ID	604286-7
ISSN	0300-5283
ISSN	0300-5283
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 1206: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Smart Flow Steering Agent for End-to-End Delay Improvement in Software-Defined Networks

Omar F. Hussain / Bilal R. Al-Kaseem / Omar Z. Akif

Baghdad Science Journal, Vol 18, Iss

2021 Volume 1

Abstract: To ensure fault tolerance and distributed management, distributed protocols are employed as one of the major architectural concepts underlying the Internet. However, inefficiency, instability and fragility could be potentially overcome with the help of ... ...

Abstract	To ensure fault tolerance and distributed management, distributed protocols are employed as one of the major architectural concepts underlying the Internet. However, inefficiency, instability and fragility could be potentially overcome with the help of the novel networking architecture called software-defined networking (SDN). The main property of this architecture is the separation of the control and data planes. To reduce congestion and thus improve latency and throughput, there must be homogeneous distribution of the traffic load over the different network paths. This paper presents a smart flow steering agent (SFSA) for data flow routing based on current network conditions. To enhance throughput and minimize latency, the SFSA distributes network traffic to suitable paths, in addition to supervising link and path loads. A scenario with a minimum spanning tree (MST) routing algorithm and another with open shortest path first (OSPF) routing algorithms were employed to assess the SFSA. By comparison, to these two routing algorithms, the suggested SFSA strategy determined a reduction of 2% in packets dropped ratio (PDR), a reduction of 15-45% in end-to-end delay according to the traffic produced, as well as a reduction of 23% in round trip time (RTT). The Mininet emulator and POX controller were employed to conduct the simulation. Another advantage of the SFSA over the MST and OSPF is that its implementation and recovery time do not exhibit fluctuations. The smart flow steering agent will open a new horizon for deploying new smart agents in SDN that enhance network programmability and management.
Keywords	SDN ; Smart Agent ; Traffic Steering ; E2E Delay ; Science ; Q
Subject code	629
Language	Arabic
Publishing date	2021-03-01T00:00:00Z
Publisher	College of Science for Women, University of Baghdad
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: A pilot study of measuring emotional response and perception of LLM-generated questionnaire and human-generated questionnaires.

Zou, Zhao / Mubin, Omar / Alnajjar, Fady / Ali, Luqman

Scientific reports

2024 Volume 14, Issue 1, Page(s) 2781

Abstract: The advent of ChatGPT has sparked a heated debate surrounding natural language processing technology and AI-powered chatbots, leading to extensive research and applications across various disciplines. This pilot study aims to investigate the impact of ... ...

Abstract	The advent of ChatGPT has sparked a heated debate surrounding natural language processing technology and AI-powered chatbots, leading to extensive research and applications across various disciplines. This pilot study aims to investigate the impact of ChatGPT on users' experiences by administering two distinct questionnaires, one generated by humans and the other by ChatGPT, along with an Emotion Detecting Model. A total of 14 participants (7 female and 7 male) aged between 18 and 35 years were recruited, resulting in the collection of 8672 ChatGPT-associated data points and 8797 human-associated data points. Data analysis was conducted using Analysis of Variance (ANOVA). The results indicate that the utilization of ChatGPT enhances participants' happiness levels and reduces their sadness levels. While no significant gender influences were observed, variations were found about specific emotions. It is important to note that the limited sample size, narrow age range, and potential cultural impacts restrict the generalizability of the findings to a broader population. Future research directions should explore the impact of incorporating additional language models or chatbots on user emotions, particularly among specific age groups such as older individuals and teenagers. As one of the pioneering works evaluating the human perception of ChatGPT text and communication, it is noteworthy that ChatGPT received positive evaluations and demonstrated effectiveness in generating extensive questionnaires.
MeSH term(s)	Adolescent ; Humans ; Female ; Male ; Young Adult ; Adult ; Pilot Projects ; Emotions ; Happiness ; Sadness ; Perception
Language	English
Publishing date	2024-02-02
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-024-53255-1
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Exploring the Plant Growth-Promotion of Four

Omar, Ayman F / Abdelmageed, Adil H A / Al-Turki, Ahmad / Abdelhameid, Noha M / Sayyed, R Z / Rehan, Medhat

Plants (Basel, Switzerland)

2022 Volume 11, Issue 23

Abstract: ... The ... ...

Abstract	The genus
Language	English
Publishing date	2022-12-01
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2704341-1
ISSN	2223-7747
ISSN	2223-7747
DOI	10.3390/plants11233316
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Dyskeratosis congenita: rare case report of Syria.

Hussein, Firas / Omar, Zainab

Oxford medical case reports

2021 Volume 2021, Issue 11, Page(s) omab041

Abstract: Dyskeratosis congenita (DC) is an inherited disease characterized by the triad of abnormal skin pigmentation, nail dystrophy and mucosal leukoplakia. Non-cutaneous abnormalities (dental, gastrointestinal, genitourinary, neurological, ophthalmic, ... ...

Abstract	Dyskeratosis congenita (DC) is an inherited disease characterized by the triad of abnormal skin pigmentation, nail dystrophy and mucosal leukoplakia. Non-cutaneous abnormalities (dental, gastrointestinal, genitourinary, neurological, ophthalmic, pulmonary and skeletal) have also been reported. Bone marrow failure (BMF) is the main cause of early mortality, with an additional predisposition to malignancy. DC results from an anomalous progressive shortening of telomeres resulting in DNA replication problems inducing replicative senescence. Men are more affected than women are and X-linked recessive, autosomal dominant and autosomal recessive forms of the disease are recognized. There are no targeted therapies for DC. Patients treated with androgens had a hematological response. We herein describe case of a 32-year-old man, presented with several characteristic systemic features of this condition, including the classic triad of lesions, dysplastic bone marrow, epiphora and liver cirrhosis with grade I esophageal varices. Therefore, a prophylactic propranolol was started in additional to danazol. Three-week later, the patient had subsequent increases in his platelet, red cell and white cell counts.
Language	English
Publishing date	2021-11-25
Publishing country	England
Document type	Case Reports
ZDB-ID	2766251-2
ISSN	2053-8855
ISSN	2053-8855
DOI	10.1093/omcr/omab041
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: MPPT control of a solar pumping system based five-phase impedance source inverter fed induction motor

Ahmed M. Hassan / Abd El-Wahab Hassan / Z. M. S. Elbarbary / Saad F. Al-Gahtani / Ahmed I. Omar / Mohamed Eladly Metwally

PLoS ONE, Vol 19, Iss

2024 Volume 1

Keywords	Medicine ; R ; Science ; Q
Language	English
Publishing date	2024-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: A pre-anesthetic bolus of ketamine versus dexmedetomidine for prevention of postoperative delirium in elderly patients undergoing emergency surgery: a randomized, double-blinded, placebo-controlled study.

Ghazaly, Huda F / Hemaida, Tarek S / Zaher, Zaher Z / Elkhodary, Omar M / Hammad, Soudy S

BMC anesthesiology

2023 Volume 23, Issue 1, Page(s) 407

Abstract: Background: We aimed to evaluate whether a single dose of ketamine or dexmedetomidine before induction of general anesthesia could reduce the incidence of postoperative delirium (primary outcome) or cognitive dysfunction (secondary outcome) in elderly ... ...

Abstract	Background: We aimed to evaluate whether a single dose of ketamine or dexmedetomidine before induction of general anesthesia could reduce the incidence of postoperative delirium (primary outcome) or cognitive dysfunction (secondary outcome) in elderly patients undergoing emergency surgery. Patients and methods: This randomized, double-blinded, placebo-controlled trial included 60 elderly patients who were scheduled for emergency surgery. The patients were randomly assigned into one of three groups (n = 20): group I received 0.9% normal saline, group II received 1 µg/kg dexmedetomidine, and group III received 1 mg/kg ketamine right before anesthesia induction. Patients were observed for three days after surgery and tested for postoperative delirium and cognitive dysfunction using the delirium observation screening scale and the mini-mental state examination score, respectively. Results: The dexmedetomidine group had the lowest incidence of delirium (p = 0.001) and cognitive dysfunction (p = 0.006) compared to the ketamine and placebo groups. The multivariate logistic regression model revealed that dexmedetomidine reduced the incidence of postoperative delirium by 32% compared to placebo (reference) (OR = 0.684, 95% CI: 0.240-0.971, p = 0.025), whereas ketamine increased the risk by threefold (OR = 3.012, 95% CI: 1.185-9.681, p = 0.013). Furthermore, dexmedetomidine reduced the incidence of postoperative cognitive dysfunction by 62% (OR = 0.375, 95% CI: 0.091-0.543, p = 0.012), whereas ketamine increased the risk by 4.5 times (OR = 4.501, 95% CI: 1.161-8.817, p = 0.006). Conclusion: A single pre-anesthetic bolus of dexmedetomidine is a practical choice for preventing postoperative delirium in elderly patients undergoing emergency surgery. Trial registration: This study was approved by the Ethics Committee of Aswan University Hospital (approval number: aswu/548/7/2021; registration date: 06/07/2021) and registered on ClinicalTrials.gov (NCT05341154) (22/04/2022).
MeSH term(s)	Humans ; Aged ; Emergence Delirium/epidemiology ; Emergence Delirium/prevention & control ; Dexmedetomidine ; Ketamine ; Delirium/epidemiology ; Delirium/prevention & control ; Delirium/diagnosis ; Anesthetics/therapeutic use ; Double-Blind Method
Chemical Substances	Dexmedetomidine (67VB76HONO) ; Ketamine (690G0D6V8H) ; Anesthetics
Language	English
Publishing date	2023-12-11
Publishing country	England
Document type	Randomized Controlled Trial ; Journal Article
ZDB-ID	2091252-3
ISSN	1471-2253 ; 1471-2253
ISSN (online)	1471-2253
ISSN	1471-2253
DOI	10.1186/s12871-023-02367-8
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Insight into the role of reduced graphene oxide in enhancing photocatalytic hydrogen evolution in disordered carbon nitride.

Rahman, Mohammad Z / Maity, Partha / Mohammed, Omar F / Gascon, Jorge

Physical chemistry chemical physics : PCCP

2022 Volume 24, Issue 18, Page(s) 11213–11221

Abstract: Compared to crystalline carbon nitride, the performance of disordered carbon nitride (d-CN) as a hydrogen production photocatalyst is extremely poor. Owing to its disordered atomic orientation, it is prone to numerous defect states. These energy states ... ...

Abstract	Compared to crystalline carbon nitride, the performance of disordered carbon nitride (d-CN) as a hydrogen production photocatalyst is extremely poor. Owing to its disordered atomic orientation, it is prone to numerous defect states. These energy states are potential sites for trapping and recombination of photogenerated charge carriers. As a result, rapid recombination of photogenerated charge carriers places a fundamental photophysical challenge in charge separation and transport, which inhibits its photocatalytic activity. In the presence of reduced graphene oxide (rGO), d-CN shows enhanced photocatalytic production of hydrogen. However, photophysical insight into the tacit role of rGO is not well understood which limits the rational design of d-CN as a photocatalyst. Particularly, understanding of the early time-scale (in fs to ps) recombination mechanism and the charge transport kinetics has not yet been achieved. With the help of ultrafast transient absorption spectroscopy, femtosecond time-resolved photoluminescence spectroscopy and transient photocurrent measurements, this article deciphers the ultrafast dynamics of the separation and transport of photogenerated charge carriers in d-CN facilitated by rGO. It is found that rGO substantially suppresses the bimolecular and trap-assisted recombination and enables a faster separation of charge carriers. As a result, it increases the lifetime of the charge carriers to be transported to the surface catalytic sites, and therefore, augments the rate of hydrogen production almost by an order of magnitude. Our findings therefore offer a proof-of-concept for overcoming the trap-mediated recombination problems in disordered carbon nitride.
Language	English
Publishing date	2022-05-11
Publishing country	England
Document type	Journal Article
ZDB-ID	1476244-4
ISSN	1463-9084 ; 1463-9076
ISSN (online)	1463-9084
ISSN	1463-9076
DOI	10.1039/d2cp00200k
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

To top

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

Full text online

More links

Kategorien

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito