OALib Journal期刊

ISSN: 2333-9721



匹配条件: “ Sana Ameen” ,找到相关结果约589条。
A TR-UWB Downconversion Autocorrelation Receiver for Wireless Body Area Network
Islam SMRiazul,Ullah Sana,Kabir MdHumaun,Ameen MA
EURASIP Journal on Wireless Communications and Networking , 2009,
Abstract: Low power UWB receiver architecture is proposed for a Wireless Body Area Network (WBAN). This receiving technology is a synergy of existing downconversion-based narrowband rejection mechanism in RF front end and signal processing in frequency domain. Frequency components of converted and filtered UWB pulses are separated into real and imaginary parts, independently correlated and effectively combined to achieve an improved output Signal to noise ratio (SNR). An extensive mathematical analysis has been performed to formulate the close-form expressions for SNRs in order to compare system performances toward favorable BER under BPSK modulation scheme. Analysis shows that optimal rotation of coordination plays an important role for the enhancement of receiving SNR which is further confirmed by computer simulation. A wide range of link level simulation (LLS) urges that the proposed system is more power efficient in higher-order modulation (HOM) schemes. Transmitted Reference (TR) scheme has been considered as the basis for wideband communication.
Applicability of Telemedicine in Bangladesh: Current Status and Future Prospects
Ahasanun Nessa,M. A. Ameen,Sana Ullah,Kyung Sup Kwak
Computer Science , 2009,
Abstract: Telemedicine refers to the use of information and communication technology to provide and support health care mainly for the purpose of providing consultation. It is also a way to provide medical procedures or examinations to remote locations. It has the potential to improve both the quality and the access to health care services delivery while lowering costs even in the scarcity of resources. Understanding the potentiality of telemedicine, many developing countries are implementing telemedicine to provide health care facility to remote area where health care facilities are deficient. Bangladesh is not an exception to this either. In this paper we mention the reasons why Bangladesh has to move for telemedicine. We also present the past and on-going telemedicine activities and projects in Bangladesh. Analyzing these projects we have found out some factors which should be assessed carefully for successful implementation of telemedicine application. Finally we propose a prototype telemedicine network for Bangladesh that can improve health facilities through telemedicine by making a connection between rural health facility providers and special hospitals.
Etiological Profile of Patients Presenting with Lower Gastrointestinal Bleeding in Ibb Governorate-Yemen  [PDF]
Abdulgafoor Kassim, Khalid Al-Qubaty, Ramea Alathwary, Sana Ameen
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104683
Objectives: To investigate the causes of lower gastrointestinal bleeding (LGIB) in Yemeni patients and to compare our results with the results of other studies. Design: Prospective study of patients with overt LGIB during the period from April 2017 to March 2018. Setting: Specialized center of gastrointestinal and liver diseases in Ibb city, Yemen. Subjects & Method: Consecutive patients who presented or referred to our center with LGIB to whom lower GI endoscopy was performed. Results: During the study period, we had 122 patients with LGIB, 72 were males and 50 were females, with male:female ratio of 1.4:1 The age ranged between 5 and 82 years and the mean age was 45 ± 17.99 years. The clinical presentations of our patients included hematochezia in 72.1%, abdominal pain in 51.7%, diarrhea in 43.3%, pallor, and anemia in 40.2%, weight loss in 39.3%, constipation in 16.4%, bloody diarrhea in 16.4%, and melena in 5.7%. The most common colonoscopic findings were hemorrhoids in 36.7% followed by colon cancer in 19.7% and nonspecific colitis in 15.6%. Conclusion: Hemorrhoids and colon cancer were the most common causes of lower GI bleeding in our patients.
Clinicopathological Pattern of Gastric Cancer of Yemeni Patients in Ibb Governorate  [PDF]
Abdulgafoor Kassim, Mohammed Al-Qubaty, Fayed Al-Yousofy, Ramea Alathwary, Sana Ameen
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104415
Objectives: To study the clinicopathological pattern of gastric cancer in-cluding the location of the tumor in the stomach and to compare our results with other studies. Design: Prospective study of patients confirmed with gastric malignancy during the period from July 2016 to July 2017. Setting: Specialized center of gastrointestinal and liver diseases in Ibb city, Yemen. Subjects: All patients with histopathological confirmation of gastric malig-nancy. Results: During the study period, we had 69 patients with gastric cancer; among them 48 were males and 21 were females, with male: Female ratio is 2.2:1. The age ranged between 35 years and 90 years and the mean age was 65.87 ± 12.79 years. Most of the patients presented with epigastric pain (87%), weight loss (72.5%), pallor (65.2%), dysphagia (47.8%), vomiting (42%), palpable epigastric mass (20.3%) and hematemesis/melena (18.8%). The cardiofundal location was encountered in 33 cases (47.8% ), 22 (45.8%) males and 11 (52.4%) females, the corpus location in 24 cases (26%), 20 (41.7%) males and 4 (19%) females, the antral location in 8 cases (11.6%), 4 (8.3%) males and 4 (19%) females and the whole stomach in 4 cases (5.8%), 2 (4.2%) males and 2 (9.5%) females. Adenocarcinoma constituted about 94.2%, of which the intestinal type was 87.5% and the diffuse type was 12.5%. The non-epithelial tumor was encounter 4.3%, of which 2.9% were lymphoma and 1.4% were GIST. Conclusion: In our studied patients, proximally located gastric cancer was the most common in both sexes.
Clinical and Histopathological Characteristics of Gastric Adenocarcinoma in Yemeni Patients: A 2 Years Prospective Study  [PDF]
Abdulgafoor Kassim, Saeed Thabet, Sadik Al-Fakih, Mohammed Alqobaty, Ramea Alathwary, Sana Ameen
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1105075
Objectives: To study the clinical and the histopathological characteristics of gastric cancer concentrating more on the gastric adenocarcinoma. Design: Prospective study of one hundred thirty Yemeni patients confirmed with gastric malignancies during the period from July 2016 to July 2017. Setting: Specialized center of gastrointestinal and liver diseases in Ibb city, Yemen. Subjects: All patients with histopathologically proved gastric cancer. Results: We collect 130 patients with gastric cancer during the study period, they were 93 males and 37 females with age ranged between 25 years and 100 years and the mean age was 64.98 ± 15.15 years. The most frequent clinical presentations of our patients were epigastric pain (81.5%), weight loss (74.6%), dysphagia (46.9%), vomiting (49.2%), palpable epigastric mass (19.2%) and hematemesis/melena (20%). Proximally located gastric cancer represented 46.1%; 48.9% of males patients and 38.9% of females patients. Adenocarcinoma constituted 92.4%, of which the intestinal type was 82.5% and the diffuse type was 17.5%. Squamous cancer accounted in 1.5%, and the non-epithelial tumor was in 6.1%, of which 4.6% were lymphoma and 1.5% were GIST. Conclusion: Adenocarcinomas are the major histological type of gastric cancer and represent 92.4% of all gastric malignancies in which intestinal type represented 82.5% and diffuse type represented 17.5%, and proximally located gastric cancer within stomach was the commonest in both sexes.
Roadmap of Otolaryngology—Head and Neck Surgery Clinic in a Tertiary Center: A Prospective Cohort Study of 1178 Patients  [PDF]
Ameen Z. Alherabi
International Journal of Otolaryngology and Head & Neck Surgery (IJOHNS) , 2016, DOI: 10.4236/ijohns.2016.51002
Abstract: Objectives: An Otolaryngology—Head and Neck Surgery clinic is an integral part of any modern tertiary center outpatient department. The objective of this article is to present our experience in developing a local electronic Makkah Otolaryngology—Head and Neck DATABASE (MO-HND) and provide a roadmap for the development of Otolaryngology—Head and Neck Surgery clinics in other tertiary centers. Methods: This is a prospective audit of all patients attending our clinic over 3 months period (July to September 2014). The data were recorded using our MO-HND. Results: A total of 1178 patients were included. The mean age was 27.7 ± 6.7 years. Participants included 586 males (49.7%) and 592 females (50.3%). There were 1139 (96.6%) Saudi and 39 (3.4%) non-Saudi patients. The specialist clinic undertook most of the workload (66%). The majority of surgery bookings (94%) were carried out through a consultant clinic. Of all participants, 80% were diagnosed with general ENT conditions, 21% underwent a procedure in the clinic, and 29% required further investigations. The surgical conversion rate was 16.3%. Conclusion: Electronic DATABASES have become important tools for improving medical services. Primary and secondary level medical centers and hospitals should increase their role in alleviating pressure from tertiary and quaternary level hospitals. In turn, a model concentrated on subspecialty clinics and services should be developed.
CdHgTe Quantum Dots Sensitized Solar Cell with Using of Titanium Dioxide Nanotubes  [PDF]
M. Y. Feteha, M. Ameen
Journal of Power and Energy Engineering (JPEE) , 2013, DOI: 10.4236/jpee.2013.15011

The sensitization of TiO2 nanotubes with CdHgTe quantum dots (QDs) was applied by using the direct dispersion technique. The CdHgTe-QDs were fabricated with different Hg% ratio in organic medium for controlling their particle size. While TiO2 nanotubes (NTs) were fabricated by anodization technique. The QDs and NTs were characterized using SEM, TEM and UV-VIS spectrophotometer. In this work, the photovoltaic parameters of the quantum dots sensitized solar cell (QDSSC) depend mainly on the Hg% ratio in the QDs. The most efficient QDSSC was obtained at 25% of Hg ratio with Jsc of 4 mA/cm2, Voc of 0.63 V, FF of 0.32 and efficiency of 0.81%.

Mineralogy and the Texture of the Basalt in Hail Region, Saudi Arabia  [PDF]
Sana’a Odat
Open Journal of Geology (OJG) , 2014, DOI: 10.4236/ojg.2014.45015

The study is carried out to list mineralogy and texture of the basalt in Hail region. The basalt flows belong to the Arabian Harrat volcanism. Cenozoic volcanism has produced 13, vast, basaltic fields in western Saudi Arabia, covering a total area of about 100,000 sq. km. The volcanism starts in the late Cretaceous time and continues periodically into the Holocene. The basaltic field presently investigated is known as Harrat Al-Hamad (or Harrat As-Shamah) which lies in northwestern Saudi Arabia, and continues northwards into Jordan. Mineralogical analysis of 20 rock samples indicates that the rocks are products of continental intra-plate magmatism; mostly as coarse-grained silica—under saturated olivine-rich alkali basalt. Mineralogical study shows that rocks are olivine, plagioclase, pyroxene, Nepheline and Opaque minerals. They correspond to alkali olivine basalts. Moreover, the main well-defined texture is intergranular, vesicular and amygdaloidal texture.

A case of lemierre syndrome.
Alherabi Ameen
Annals of Saudi Medicine , 2009,
Pre-Application Evaporation of Surgical Preparation Solutions: Does It Matter?  [PDF]
Osama Elsewaisy, Yasmin Ameen, Daniel Sydenham
Surgical Science (SS) , 2012, DOI: 10.4236/ss.2012.34035
Abstract: Introduction: Surgical site infections (SSIs) remain the most common health care associated infections in the surgical population. Preoperative surgical preparation solutions containing alcohol are believed to be best at eradicating skin microorganisms. The efficacy of alcohol is concentration dependant, with a concentration of greater than 60% most bactericidal. Surgical antisepsis guidelines do not stipulate how long alcoholic preparation solutions can be left out prior to use. Method: 30 ml of Alcoholic Iodine (Iodine 1% in Alcohol 70% (v/v)) and Alcoholic Chlorhexidine (Chlorhex-idine 2% in Alcohol 70% (v/v)) were left to stand in gallipots in an operating theatre equipped with laminar flow. Sam-ples were taken at 0, 30, 60 and 120 minutes and the alcohol content was analyzed. The experiment was repeated 3 times for each time interval. Results: The Alcoholic Iodine group demonstrated significant decrease in alcohol concen-tration, from a mean of 76% (SD 3.6) to a mean of 37.7% (SD 2.9) in only 30 minutes. This effect was sustained, reaching a mean concentration of 26% (SD 2.9) alcohol at 120 minutes. The Alcoholic Chlorhexidine group did not exhibit the same degree of concentration drop, the concentration dropped marginally to 71.5% (SD 2.7) at 120 minutes from 83.4% (SD 0.4). Conclusion: Alcoholic Iodine exhibits significant evaporation under operating room conditions after 30 minutes. Alcoholic Chlorhexidine does not appear to undergo similar losses in concentration. We recommend that alcoholic surgical preparation solutions must be poured immediately prior to use, and must be discarded if left un-covered for more than a few minutes.

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