oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 48 )

2018 ( 257 )

2017 ( 226 )

2016 ( 310 )

Custom range...

Search Results: 1 - 10 of 111674 matches for " Omenge Orang’o "
All listed articles are free for downloading (OA Articles)
Page 1 /111674
Display every page Item
Knowledge and Utilisation of Emergency Contraception Pills among Female Undergraduate Students at the University of Nairobi, Kenya  [PDF]
Mwaniki Grace Nyambura, James N. Kiarie, Omenge Orango, Okubatsion Tekeste Okube
Open Journal of Obstetrics and Gynecology (OJOG) , 2017, DOI: 10.4236/ojog.2017.79100
Abstract: Background: Emergency Contraception (EC) is used after unprotected sexual intercourse, following sexual abuse, misuse of regular contraception or non-use of contraception. Seventeen percent of pregnancies in Kenya are unintended, potentially leading to unsafe abortion that contributes to the high maternal mortality rate in Country. According to 2016 Kenya Demographic and Health Survey (KDHS), the maternal mortality ratio was 362 maternal deaths per 100,000 live births. Female students in University or College are vulnerable to unplanned pregnancies and illegal abortions resulting in mortality, morbidity and psychosocial problems. Knowledge on EC is very important for students as they are not in stable relationships and not using regular contraception. Therefore, the aim of this study was to determine the knowledge and use of Emergency Contraception among female undergraduate students in the University of Nairobi. Materials and Methods: We used an institution-based cross sectional, quantitative study to sample was employed among 383 female undergraduate students at the University of Nairobi. The University of Nairobi has six colleges and systematic random sampling was used to select study participants from each college. Data were collected using self-administered questionnaires and analysed using SPSS Version 16. Bivariate analysis and logistic regression were used to determine sample characteristics significantly associated with knowledge and utilisation of Emergency Contraception. Results: Most (53%) of the respondents were sexually active, and only 20% of the sexually active female students had ever used Emergency Contraception. Emergency Contraception awareness was high at 86.4%. However, based on a predefined criterion, accurate knowledge of Emergency Contraception was low at 42.6%.The majority (82.5%) of the
Effect of Socialization with Regard to Gender Roles on Students’ Academic Achievement in Secondary Schools in Kisii Central District, Kenya
Nyatuka Benard Omenge,J.W. Nasongo
Current Research Journal of Social Science , 2010,
Abstract: This study sought to determine the effect of socialization with specific reference to the allocation of domestic chores on the academic achievement of boys and girls in mixed day secondary schools in Mosocho Division of Kisii Central District, Kenya. The research was ex-post facto with the specific use of the corelational research design. Data was collected in the months of September and October 2007 from 119 boys and 100 girls in Form Three, randomly selected from 14 mixed day secondary schools. In addition, 14 class teachers as well as 14 Parents - Teachers Association (PTA) members were purposively involved in the study. Questionnaires and interview schedules were used to collect data w hereas end of term exam results provided data to be analyzed. The t-test was used to test the null hypotheses at 0.05 level of significance. The findings linked students’ participation in dom estic chores to low academic achievement. The results also suggested that students’ engagement in domestic duties affected both boys’ and girls’ academic achievement equally. The study concluded that that the students’ low academic achievement could be attributed to involvement in domestic chores. The study recommends that the domestic chores assigned to the students be reduced as well as offering guidance and counseling to the affected students with intent to boost academic achievement.
Accuracy assessment of laparoscopic examination of intra-abdominal organs in trauma victims
H. Peyvandi,M. Talebpoor,Z. Begam Orang,H. Ahmadi Amoli
Tehran University Medical Journal , 2006,
Abstract: Background: Performing traditional autopsy mostly seems to be unpleasant in dead persons' relatives' opinion. This study aimed to determine the accuracy of laparoscopic examination of intra abdominal organs in comparison to the traditional autopsy in trauma victims. Methods: From December 2004 to September 2005, 50 fresh cadavers of blunt trauma victims were studied in less than 24 hours from death time. Intraperitoneal and retroperitoneal organs were first evaluated by laparoscope and then the traditional autopsy was performed as gold standard. The organs were assessed regarding impairment and its grade in both ways. Diagnostic accuracy of laparoscope was determined for each case with 95% confidence interval using Fisher's exact test. Results: The values of overall and distinct accuracy of laparoscopic examination for intraperitoneal and retroperitoneal organs were significantly comparable with traditional autopsy. The accuracy of laparoscopic evaluation of intraperitoneal and retroperitoneal organs were 90% (95% CI of 81.7% to 94.8%) and 92% (95% CI of 84.7% to 96%) respectively in comparison to open autopsy. The overall accuracy of laparoscopic examination was 84% (95% CI of 74.3% to 90.5%). Conclusion: The sensitivity and specificity of laparoscopic examination for intraperitoneal but not retroperitoneal organs were acceptable in comparison to open autopsy. Laparoscopic examination seems to be an eligible substitute for the traditional autopsy in assessment of intraperitonel organs.
INVESTIGATION OF NOVEL METHODS TO IMPROVE THE STORAGE STABILITY AND LOW TEMPERATURE SUSCEPTIVITY OF POLYETHYLENE MODIFIED BITUMENS
S. Hassan Firoozifar,Yashar Azimi Alamdary,Orang Farzaneh
Petroleum and Coal , 2010,
Abstract: In recent decades, high traffic rate and higher number of trucks for freight transportation causes more pavement distresses and weak pavement conditions. Therefore, modification of bitumen or asphalt concrete is the best way to increase the asphalt life cycle. In polymer modification technique, different types of polymer used such as styrene butadiene styrene block copolymer (SBS), polyethylene, polypropylene and rubbers. As Polyethylene is produced locally in Iran and has many advantages in bitumen modification, the aim of this project is to evaluate the bitumen characteristics using different grades of polyethylenes. Although, the addition of polyethylenes would modify bitumen in a cost effective manner, it could face to some problems, such as low compatibility and poor storage stability. So, this paper focus on various ways to stabilize these modified bitumens. Although, high instability for linear low density polyethylene (LLDPE) and high density polyethylene (HDPE) were found, low density polyethylene (LDPE) can be stabilized in bitumen easily using small amounts of oil. Addition of oil to the samples containing mixture of LDPE and SBS was also investigated and improvement in the stability and low temperature properties were found.
Training Based Method for Heat Flux Function Estimation Using Sensed Temperatures
Morteza Mohmmadzaheri,Orang Asef-Afshar,Ali Mirsepahi,Mansur Bornak
Sel?uk Journal of Applied Mathematics , 2006,
Abstract: Heat flux function estimation problems are inverse heat conduction problems which heat flux functions (boundary or initial conditions) are the unknowns and temperature distribution (at present and earlier times) is available. There are several algorithms for solving this type of IHC problems. In all of these methods the computational cost is very heavy and all of common IHCP algorithm requires finding the solution of the direct heat conduction problem numerous times. In this paper the neural networks is utilized to estimate the "filter coefficients" needed to estimate heat flux in a particular system. In developing the training phase of the network inspiration is drawn from the Burgraff's exact solution of the IHCP as well as the filter method. Thus, the estimation phase neither requires any temperature field nor the sensitivity coefficients calculations which are common in classical methods. The neural network used in this work is a 2-layer perceptron. It is shown via classical triangular heat flux test cases that the method can yield very accurate, very efficient as well as stable estimations.
Evaluation of Ceftriaxone Releasing from Microspheres Based on Starch Against Salmonella spp.
Parviz Owlia,Leila Sadeghzadeh,Fariba Orang,Mohamad Rafienia
Biotechnology , 2007,
Abstract: In this study, ceftriaxone-loaded microspheres were prepared by an inverse emulsion polymerization method using starch as raw material. The effects of cross linking agent, glutaraldehyde and the time of cross linking on antimicrobial behavior of drug loaded-microspheres were investigated against Salmonella typhi, Salmonella paratyphi A and Salmonella paratyphi B. Surface morphological characteristics and size distribution of prepared microspheres were studied by using an optical microscope. Microspheres loaded by ceftriaxone displayed different activities against microorganisms. The maximum diameter of inhibition zone caused by the microspheres was 19 mm and prolonged release pattern for 24 h. Microspheres had spherical shape and the size of cross linked microspheres was larger than uncross linked ones. Their size distributions were between 1 to 40 μm. It is probable, with more study, to increase the efficacy of treatment by this method.
MRI Findings of Cervical Spine Lesions among Symptomatic Patients and Their Risk Factors
H. Hashemi,K. firouznia,H. Soroush,J. Amir orang
Iranian Journal of Radiology , 2003,
Abstract: Background: Cervical spine and intervertebral discs are potentially prone to functional disorders. Objectives:This study sought type and distribution of different pathologies in the cervical spine and a possible relationship between the MRI findings and the probable risk factors of the degenerative disorders. Material and methods: This descriptive cross-sectional research was carried out from October 2000 to January 2002 in three referral centers in Tehran. All the patients had referred for cervical MRI for neck pain and/or radicular pain. Results: Totally 342 patients entered the study. Sixty percent of patients were male. The mean age was 55.1 12.1 years. Seventy-nine percent of patients had abnormal MRI findings (238 patients (70%) had signs of degenerative processes and 31 patients (9%) had the other findings) with a total 308 pathologies. The most common findings were disc bulging/ protrusion (%21.1), disc dehydration (%20.1), disc herniation (%18.1), and canal stenosis(%17.5). Older age, male gender and history of neck trauma were associated with increasing probability of degenerative changes (P-Values<0.05). Conclusion: Types of cervical spine pathologies are comparable to other reports. The anatomical distribution of disc bulging and protrusion in our study are similar to other reports. Likewise age, gender and a history of trauma to the neck were closely associated with the degenerative signs on the MR images.
Spin Damping in an RF Atomic Magnetometer
Orang Alem,Karen L. Sauer,Mike V. Romalis
Physics , 2012, DOI: 10.1103/PhysRevA.87.013413
Abstract: Under negative feedback, the quality factor Q of a radio-frequency magnetometer can be decreased by more than two orders of magnitude, so that any initial perturbation of the polarized spin system can be rapidly damped, preparing the magnetometer for detection of the desired signal. We find that noise is also suppressed under such spin-damping, with a characteristic spectral response corresponding to the type of noise; therefore magnetic, photon-shot, and spin-projection noise can be measured distinctly. While the suppression of resonant photon-shot noise implies the closed-loop production of polarization-squeezed light, the suppression of resonant spin-projection noise does not imply spin-squeezing, rather simply the broadening of the noise spectrum with Q. Furthermore, the application of spin-damping during phase-sensitive detection suppresses both signal and noise in such a way as to increase the sensitivity bandwidth. We demonstrate a three-fold increase in the magnetometer's bandwidth while maintaining 0.3 fT/\surdHz sensitivity.
Using Adaptive Neuro-Fuzzy Inference System in Alert Management of Intrusion Detection Systems
Zahra Atashbar Orang,Ezzat Moradpour,Ahmad Habibizad Navin,Amir Azimi Alasti Ahrabi
International Journal of Computer Network and Information Security , 2012,
Abstract: By ever increase in using computer network and internet, using Intrusion Detection Systems (IDS) has been more important. Main problems of IDS are the number of generated alerts, alert failure as well as identifying the attack type of alerts. In this paper a system is proposed that uses Adaptive Neuro-Fuzzy Inference System to classify IDS alerts reducing false positive alerts and also identifying attack types of true positive ones. By the experimental results on DARPA KDD cup 98, the system can classify alerts, leading a reduction of false positive alerts considerably and identifying attack types of alerts in low slice of time.
Using Learning Vector Quantization in Alert Management of Intrusion Detection System
Amir Azimi Alasti Ahrabi,Kaveh Feyzi,Zahra Atashbar Orang,Hadi Bahrbegi
International Journal of Computer Science and Security , 2012,
Abstract: Intrusion detection system (IDS) is used to produce security alerts to discover attacks againstprotected network and/or computer systems. IDSs generate high amount of security alerts andanalyzing these alert by a security expert are time consuming and error pron. IDS alertmanagement system are used to manage generated alerts and classify true positive and falsepositives alert. This paper represents an IDS alert management system that uses learning vectorquantization technique to classify generated alerts. Because of low classification time per eachalert, the system also could be used in active alert management systems.
Page 1 /111674
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.