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Search Results: 1 - 10 of 6072 matches for " Omar (mohamad raouf) Hayajneh "
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Time Management in Travel and Tourism Companies in Jordan
Mohammad Nayef Alsarayreh,Mohammed Abdul Razzaq Abu Rumman,Marwan M. Al-Nsour,Omar (mohamad raouf) Hayajneh
Journal of Management Research , 2011, DOI: 10.5296/jmr.v4i1.1005
Abstract: The study aimed to reveal the reality of time management in travel and tourism companies in Jordan through identifying the loss of time and the reasons for that, whether regulatory or informational, and learn how efficient the management of choke points, and how quickly does customer requests are responded to.The required data has been collected by questionnaire of 14 companies. The main findings of the study is that there is no waste of time in travel and tourism companies in Jordan due to organizational and informational aspect, with the exception of certain matters such as conflict of business goals, there isn't coordination between departments of the company, and there isn't renewed and up-to-date information for decision-maker when taking any decision. The study also found that they don't manage time of choke points efficiently, and they're quick to respond to customer orders, except that it does not provide new tourism products to customers in a rapid and up-to-date wayMost importantly, the study recommended tourism and travel companies in Jordan to work to eliminate or decrease conflict in work objectives, guide the company's departments towards coordination among them, provide up-to-date and renewed information continuously for decision maker, and manage choke points time more efficiently, as well as to provide new tourist products for customers in a rapid and up-to-date way.
Workspace Tracking Control of Two-Flexible-Link Manipulator Using Distributed Control Strategy
Fareh Raouf,Saad Mohamad,Saad Maarouf
Journal of Control Science and Engineering , 2013, DOI: 10.1155/2013/617465
Abstract: A distributed nonlinear control strategy for two-flexible-link manipulators is presented to track a desired trajectory in the robot’s workspace. The inverse dynamics problem is solved by transforming the desired trajectory from the workspace to the joint space using an intermediate space, called virtual space, and then using the quasi-static approach. To solve the nonminimum phase problem, an output redefinition technique is used. This output consists of the motor’s angle augmented with a weighted value of the link’s extremity. The distributed control strategy consists in controlling the last link by assuming that the first link is stable and follows its desired trajectories. The control law is developed to stabilize the error dynamics and to guarantee bounded internal dynamics such that the new output is as close as possible to the tip. The weighted parameter defining the noncollocated output is then selected. The same procedure is applied to control and stabilize the first link. The asymptotical stability is proved using Lyapunov theory. This algorithm is applied to a two-flexible-link manipulator in the horizontal plane, and simulations showed a good tracking of the desired trajectory in the workspace. 1. Introduction Many control strategies for manipulators have been the focus of several studies in recent years. The robot manipulators consist of a sequence of links and joints in various combinations. In industrial applications, most of the existing manipulators use rigid links and joints and are known as rigid manipulators. Rigid manipulators are generally slow, extremely rigid, and massive, and the useful load is very low compared to their weight. To improve the performance of the robot manipulators, their links must be lighter, and therefore they become more flexible. Flexible manipulators present more advantages when compared to rigid manipulators: they are faster and less massive and consume less energy. Some flexible manipulators are used in different areas, for example, the aerospace applications [1] and medical applications [2]. For flexible manipulators, the problem of workspace tracking trajectory is less covered so far than that of joint space tracking. There are few solutions to the workspace tracking problem, particularly for manipulators with many flexible links. The workspace tracking trajectory is very important since most of the tasks are defined in the operational space, such as painting, welding, and assembly. The flexible link manipulators are a nonminimum phase system when controlling the position of the end effector [3]. Unlike
Insulinoma misdiagnosed as epilepsy  [PDF]
Ouadii Mouaqit, Ayman Boubouh, Lahcen Ifrine, El Hadj Omar El Malki, Raouf Mohsine, Abdelkader Belkouchi
Open Journal of Gastroenterology (OJGas) , 2012, DOI: 10.4236/ojgas.2012.21006
Abstract: Insulinoma is a rare disease presenting with episodic neuroglycopenic and/or adrenergic symptoms. We describe the clinical case of a female subject, 44 years old, affected with insulinoma, misdiagnosed for two years as epilepsy, threaten with antiepileptics. Insuli-noma was diagnosed based on fasting blood glucose level of 15 mg/dl, high fasting immunoreactive insu-lin/blood glucose ratio (more than 0.3), and a tumor in the pancreas by abdominal CT. After surgical re-moval of the neoplasm, the blood glucose level and insulin level turned normal. A benign insulinoma was also confirmed by histopathological evaluation. The patient remained seizure-free during the 2-year follow up.
On the zeros of Dirichlet $L$-functions
Sami Omar,Raouf Ouni,Kamel Mazhouda
Mathematics , 2015,
Abstract: In this paper, we compute and verify the positivity of the Li coefficients for the Dirichlet $L$-functions using an arithmetic formula established in Omar and Mazhouda, J. Number Theory 125 (2007) no.1, 50-58; J. Number Theory 130 (2010) no.4, 1109-1114. Furthermore, we formulate a criterion for the partial Riemann hypothesis and we provide some numerical evidence for it using new formulas for the Li coefficients.
Do Children with Dyslexia Have Difficulty in Reading the Quranic Verses Too?  [PDF]
Shalinawati Ramli, Khairani Omar, Mohamad Ahsanullah El Baki, Shahlan Surat
Creative Education (CE) , 2016, DOI: 10.4236/ce.2016.77106
Abstract: Dyslexia, a type of learning disability, is a neurodevelopmental disorder that affects reading, writing and spelling in children. It is one of the commonest learning disorders among school-going children. The causes of dyslexia are multifactorial and are hereditary. The objective of this study was to determine if children with dyslexia have difficulty in reading the Quranic verses too. This was a cross-sectional study conducted at a government primary school in Kuala Lumpur. All standard one pupils, a total of 200 pupils, were screened for reading, writing and numerical difficulties by the school teachers in March, 2014 using LINUS screening tool, a standardized literacy screening tool adopted by all Malaysian schools. Students who failed the first LINUS screening were given intervention by the school teachers. Six months later, the research team reassessed the pupils who failed the Linus screening. Approximately 18% (37 pupils) of the standard one pupils had dyslexia. Of these, 33 of them were Muslims and were assessed if they had difficulty reading the Quranic verses by using Iqra’, which is the basic reading material for Quranic verses. About 79% of them had difficulty reading the Quran. The majority of the children with dyslexia also had difficulty reading the Quranic verses. Thus remedial intervention for Muslim dyslexic children should also include learning to read the Quran.
Ketamine and midazolam sedation for pediatric gastrointestinal endoscopy in the Arab world
Mohamad-Iqbal S Miqdady,Wail A Hayajneh,Ruba Abdelhadi,Mark A Gilger
World Journal of Gastroenterology , 2011, DOI: 10.3748/wjg.v17.i31.3630
Abstract: AIM: To evaluate the safety and effectiveness of intravenous ketamine-midazolam sedation during pediatric endoscopy in the Arab world. METHODS: A retrospective cohort study of all pediatric endoscopic procedures performed between 2002-2008 at the shared endoscopy suite of King Abdullah University Hospital, Jordan University of Science & Technology, Jordan was conducted. All children were > 1 year old and weighed > 10 kg with American Society of Anesthesiologists class 1 or 2. Analysis was performed in terms of sedation-related complications (desaturation, respiratory distress, apnea, bradycardia, cardiac arrest, emergence reactions), adequacy of sedation, need for sedation reversal, or failure to complete the procedure. RESULTS: A total of 301 patients (including 160 males) with a mean age of 9.26 years (range, 1-18 years) were included. All were premedicated with atropine; and 79.4% (239/301) had effective and uneventful sedation. And 248 (82.4%) of the 301 patients received a mean dose of 0.16 mg/kg (range, 0.07-0.39) midazolam and 1.06 mg/kg (range, 0.31-2.67) ketamine, respectively within the recommended dosage guidelines. Recommended maximum midazolam dose was exceeded in 17.6% patients [34 female (F):19 male (M), P = 0.003] and ketamine in 2.7% (3 M:5 F). Maximum midazolam dose was more likely to be exceeded than ketamine (P < 0.001). Desaturation occurred in 37 (12.3%) patients, and was reversible by supplemental oxygen in all except 4 who continue to have desaturation despite supplemental oxygen. Four (1.3%) patients had respiratory distress and 6 (2%) were difficult to sedate and required a 3rd sedative; 12 (4%) required reversal and 7 (2.3%) failed to complete the procedure. None developed apnea, bradycardia, arrest, or emergence reactions. CONCLUSION: Ketamine-midazolam sedation appears safe and effective for diagnostic pediatric gastrointestinal endoscopy in the Arab world for children aged > 1 year and weighing > 10 kg without co-morbidities.
A novel influenza A (H1N1) outbreak experience among residents of a long term-care facility in Saudi Arabia during 2010 seasonal flu circulation
Raouf M. Afifi,Sherif Omar,Ahmed El Raggal
Infectious Disease Reports , 2012, DOI: 10.4081/idr.2012.e23
Abstract: The aim of this work was to describe and analyze an outbreak of novel 2009 influenza A (H1N1) among residents of a long-term care facility (LTCF) in Prince Mansour Military Hospital (PMMH), Taif, Saudi Arabia. These patients had been admitted to the LTCF months or years before the outbreak for several reasons, e.g. cerebral palsy, neurological deficits due to road traffic accidents with resultant handicap, chronic diseases associated with old age. An observational study was carried out to demonstrate and analyze the epidemiological characteristics (demographic factors, risk factors, and outcomes) associated with the outbreak in order to clarify which prevention and control measures had been taken and which recommendations were followed. During the period October 28 to November 11 2010, 21 LTCF residents were suspected to be clinically involved: fever ≥38oC with influenza-like illness (ILI). Age ranged from 9-91 years (mean 46±24.13); 62% were males. Among them, 12 (57%) were influenza A (H1N1) positive by reverse transcription polymerase chain reaction (RTPCR). Mortality involved 2 (17%) of the A (H1N1) laboratory confirmed individuals. Implementation of the recommended infection control measures mitigated the transmission of infection to new individuals. The fulfillment of strict infection control measures could limit H1N1 infection among LTCFPMMH patients. Routine influenza, including specific H1N1 immunization of all LTCF residents together with their healthcare staff, should be mandatory in those settings serving immunocompromised patients.
Portfolio Evaluation Based on Efficient Frontier Superiority Using Center of Gravity
Zulkifli Mohamed,Daud Mohamad,Omar Samat
Journal of Applied Computer Science & Mathematics , 2010,
Abstract: Investing in portfolio of assets is the best way to reduce the investment risk. The most desired portfolio can be obtained when investors chose to invest in the portfolios that lay on the portfolio’s efficient frontier. However, the superiorities of the portfolios are difficult to differentiate especially when the efficient frontier curves are overlapping. This paper proposed the portfolio’s efficient frontier center of gravity (CoG) and Euclidean distance to identify its superiority. A sample of 49 stocks of large-cap and small-cap were used to construct two hypothetical portfolios and its efficient frontiers. The Euclidean distance showed that the large-cap portfolio is superior and having wider feasible solutions compared to the small-cap portfolio. The results of new tool introduced are consistent with the conventional methods. Here the theoretical and practical implications are provided in light of the findings.
Acute abdominal compartment syndrome complicating a colonoscopic perforation: a case report
Amine Souadka, Raouf Mohsine, Lahsen Ifrine, Abdelkader Belkouchi, Hadj Omar El Malki
Journal of Medical Case Reports , 2012, DOI: 10.1186/1752-1947-6-51
Abstract: We report a case of acute abdominal compartment syndrome after perforation of the bowel during a colonoscopy in a 60-year-old North African man with rectal cancer, resulting in respiratory distress, cyanosis and cardiac arrest. Our patient was treated by needle decompression after the failure of cardiopulmonary resuscitation. An emergency laparotomy with anterior resection, including the perforated sigmoid colon, was then performed followed by immediate anastomosis. Our patient remains alive and free of disease three years later.Acute abdominal compartment syndrome is a rare disease that may occasionally occur after a colonoscopic perforation. It should be kept in mind during colonoscopy, especially considering its simple salvage treatment.Colonic perforation due to colonoscopy rarely occurs but still remains a major complication with a high rate of morbidity and mortality and often needs surgical management [1]. The frequency of perforation is estimated to be 0.03% to 0.9% for diagnostic colonoscopy and 0.15% to 2% for therapeutic colonoscopy [2-4]. In diagnostic procedures, perforations often result from the pressure on the colonic wall, especially in ones noted to be a 'difficult procedure' by the endoscopist [5]. The diagnosis is often suspected after the visualization of extra-intestinal tissue. It is well established that therapeutic colonoscopies are associated with a higher incidence of perforation than diagnostic ones [4,6].Abdominal compartment syndrome (ACS) refers to organ dysfunction that may occur as a result of increased intra-abdominal pressure (IAP)[7,8]. It may be classified as acute primary, secondary or recurrent according to its cause and duration [9,10].We report a life threatening case of primary acute abdominal compartment syndrome (AACS) resulting from iatrogenic colonic perforation during a diagnostic colonoscopy.We report the case of a 60-year-old Moroccan man admitted for the surgical management of a high rectal adenocarcinoma. He had no
A WBAN for Human Movement Kinematics and ECG Measurements  [PDF]
Ahmed Baraka, Ahmed Shokry, Ihab Omar, Saged Kamel, Tarek Fouad, Mohamad Abou El-Nasr, Heba Shaban
E-Health Telecommunication Systems and Networks (ETSN) , 2012, DOI: 10.4236/etsn.2012.12004
Abstract: Biomedical applications of body area networks (BANs) are evolving, where taking periodic medical readings of patients via means wireless technologies at home or in the office will aid physicians to periodically supervise the patient’s medical status without having to see the patient. Thus, one important objective of BANs is to provide the doctor with the medical readings that can be collected electronically without being in close proximity to the patient. This is done through the measurement of the patient’s physiological signals via means of wearable sensors. This paper investigates wireless BAN cooperation via actual measurements of human movement kinematics and electrocardiogram (ECG), which are believed to provide patients with easy healthcare for continuous health-monitoring. The collected information will be processed using specially designed software, which in turn will enable the patient to send a full medical chart to the physician’s electronic device. In this way, physicians will have the ability to monitor their patients more efficiently.
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