oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 202 )

2018 ( 332 )

2017 ( 341 )

2016 ( 543 )

Custom range...

Search Results: 1 - 10 of 198200 matches for " N Noori majelan "
All listed articles are free for downloading (OA Articles)
Page 1 /198200
Display every page Item
Evaluation of Peritoneal Dialysis Complications and Survival of Patients; A Single Center Study, Yazd ,Iran
M Rahimian,M Karimi,MH Lotfi,N Noori majelan
Journal of Shahid Sadoughi University of Medical Sciences , 2008,
Abstract: Introduction: Peritoneal dialysis is an established form of renal replacement therapy used in many patients with end – stage renal disease . Peritoneal dialysis has different complications This study was conducted in order to evaluate its complications and different survival probabilities of factors in Shahid Rahnemoon hospital . Methods: In this retrospective, historical cohort study, reports of 161 patients on peritoneal dialysis (Shaheed Rahnemoon hospital, dialysis department) from 3.Dec.1997 to 20.May.2007 were evaluated. Required data was gathered and analyzed by specific statistical tests. Results: The mean age of patients was 49.37 years (2 to 88 years) and most of them (41.6%) included in 40-59 years age group category. Peritonitis, exit site infection and catheter malposition was seen in 41.6% , 6.8% and 9.3% of patients ,respectively.Rate of peritonitis in females was more than males (p=0.002). Diabetes mellitus had no effect on death rate, but hypertension had a protective role. Conclusion: Peritonitis ,exit site infection and catheter malposition is more prevalent in females, but mortality rate is significantly higher in males.
A Study about Mortality of Hospitalized Patients in CCU and Internal Wards of Amir Alam Hospital, 1374-76
S Moradmand,M Eshagh Hosseini,N Noori
Tehran University Medical Journal , 2001,
Abstract: This is a mortality study in internal medicine wards of Amir-Alam Hospital, since the beginning of 1374 to end of 1376. Here, we reviewed, prevalence of disease lead to death, the ward and invasive interventions and duration of admission of patients before death. In this study, records of 85 patients were reviewed. 68.2% of patients were men and 31.8% women. Mean of age was 61.6% with minimum of 18 and maximum 95 years. The most prevalent diseases leading to death were cardio vascular (41.2%), cancer 29.4%, GI tract diseases (10.6%), pulmonary diseases (8.3%), CNS (7.1%), hemathologic (4.7%), DM (3.5%). Mean duration of stay in hospital before death was 6.6 days (max 30-min 1). This figure in different wards were: ward 1 (7 days), ward 2 (11 days), ward 3 (5.9 days) ICU (5 days) and CCU (4.7 days). 90.5% of patients died due to their diagnosed illnesses. Invasive tests and intervations were performed in 40% of them. As a whole 35 patient were died in CCU. This research and others like it showes the failures of our patient management system and can guide us in approaching to better medical care.
BSDCH: New Chain Routing Protocol with Best Selection Double Cluster Head in Wireless Sensor Networks  [PDF]
Majid Noori, Alireza Khoshtarash
Wireless Sensor Network (WSN) , 2013, DOI: 10.4236/wsn.2013.52002
Abstract:

The Optimum use of energy is one of the significant needs in wireless sensor networks, because sensor devices would usually use the battery power. In this article, we give the suggested routing algorithm (BSDCH) with determining an optimum routine due to the energy use and the number of passed hobs. To transfer date from nodes’ sensor to BS (Base Station), data sending has been utilized in chains. In BSDCH algorithm, the nodes’ space is divided into several regions. In this article, each part is called a cluster. In each cluster, a node which is the best due to energy and distance comparison with other cluster nodes it is continuously selected with a given Formula (4) which is called main CH (Cluster Head) and forms a chain in that cluster and in each node cluster, it is selected by Formula (5) as secondary CH with the least distance and the best situation to BS and main CH. the secondary CH task is to receive data from the main CH and send data to the BS. As far as the main cluster head would waste too much energy to send data to BS, so to send data through secondary CH, we can keep main CH energy for more time. In the time of sending data from nodes to main CH, a multi chain is utilized. In the time of making nodes’ chain, nods are connected straight into its main CH radius and other nodes are connected in their sending radius which would have the least distance to main CH. Finally, also, BSDCH has been compared with PEGASIS [1] and PDCH [2]. The simulation results are shown which are indicator of a better BSDCH performance.

A Comparison between Major Factor Extraction and Factor Rotation Techniques in Q-Methodology  [PDF]
Noori Akhtar-Danesh
Open Journal of Applied Sciences (OJAppS) , 2017, DOI: 10.4236/ojapps.2017.74013
Abstract: The statistical analysis in Q-methodology is based on factor analysis followed by a factor rotation. Currently, the most common factor extraction methods are centroid and principal component extractions and the common techniques for factor rotation are manual rotation and varimax rotation. However, there are some other factor extraction methods such as principal axis factoring and factor rotation methods such as quartimax and equamax which are not used by Q-users because they have not been implemented in any major Q-program. In this article we briefly explain some major factor extraction and factor rotation techniques and compare these techniques using three datasets. We applied principal component and principal axis factoring methods for factor extraction and varimax, equamax, and quartimax factor rotation techniques to three actual datasets. We compared these techniques based on the number of Q-sorts loaded on each factor, number of distinguishing statements on each factor, and excluded Q-sorts. There was not much difference between principal component and principal axis factoring factor extractions. The main findings of this article include emergence of a general factor and a smaller number of excluded Q-sorts based on quartimax rotation. Another interesting finding was that a smaller number of distinguishing statements for factors based on quartimax rotation compared to varimax and equamax rotations. These findings are not conclusive and further analysis on more datasets is needed.
Using Cohen’s Effect Size to Identify Distinguishing Statements in Q-Methodology  [PDF]
Noori Akhtar-Danesh
Open Journal of Applied Sciences (OJAppS) , 2018, DOI: 10.4236/ojapps.2018.82006
Abstract: Q-methodology was introduced more than 80 years ago to study subjective topics such as attitudes, perceptions, preferences, and feelings and there has not been much change in its statistical components since then. In Q-methodology, subjective topics are studied using a combination of qualitative and quantitative techniques. It involves development of a sample of statements and rank-ordering these statements by study participants using a grid known as Q-sort table. After completion of Q-sort tables by the participants, a by-person factor analysis (i.e., the factor analysis is performed on persons, not variables or traits) is used to analyze the data. Therefore, each factor represents a group of individuals with similar views, feelings, or preferences about the topic of the study. Then, each group (factor) is usually described by a set of statements, called distinguishing statements, or statements with high or low factor scores. In this article, we review one important statistical issue, i.e. the criteria for identifying distinguishing statements and provide a review of its mathematical calculation and statistical background. We show that the current approach for identifying distinguishing statements has no sound basis, which may result in erroneous findings and seems to be appropriate only when there are repeated evaluations of Q-sample from the same subjects. However, most Q-studies include independent subjects with no repeated evaluation. Finally, a new approach is suggested for identifying distinguishing statements based on Cohen’s effect size. We demonstrate the application of this new formula by applying the current and the suggested methods on a Q-dataset and explain the differences.
The Educational System Challenges from the Perspective of Modern Technologies  [PDF]
Maryam Safari, Batool Noori
Open Journal of Social Sciences (JSS) , 2019, DOI: 10.4236/jss.2019.73033
Abstract: Information and communication technology and the movement from traditional societies to information communities have affected all human dimensions and needs. Educational institutions, including universities and schools, are the largest producer, distributor and storage of information and knowledge and if done, a good effort to properly apply information technology and focus it on the development plan, educational systems will be able to become one of the largest sources of skilled human resource development in information technology and play an important scientific and economic role in the country and global competitions. The most important obstacle to the use of modern educational technologies is economic impediment from the perspective of teachers and managers. After that, the most important barriers were strategic, educational, technical, legal and cultural barriers respectively. Also, the study of the researches between the use of modern educational technologies and students’ educational progress shows that there are many barriers in using information and communication technology that is influenced by the situation and its application fields. Therefore, this research tries to address the barriers to the application of information and communication technology in the educational system.
The Effect of Different Fuels on Particle Size and Morphology of FTO Nano Powder Synthesized by Gel Combustion Method
Sarraf-Mamoory R.,Dabir F.,Riahi-Noori N.
Proceedings of the International Conference Nanomaterials : Applications and Properties , 2012,
Abstract: In this study, a gel combustion method was used to prepare fluorine-doped tin oxide (FTO) nano pow-ders. Stannous chloride dehydrate, hydrofluoric acid, and different fuels of glycine, urea, and citric acid were used to synthesize FTO nano powder, followed by calcination at 600 °C. The results showed that us-ing citric acid as a fuel gives homogenous FTO nano powder with average particle size of 40 nm and round morphology.
An Empirical Ultra Wideband Channel Model for Indoor Laboratory Environments
N. Noori,R. Karimzadeh-Baee,A. Abolghasemi
Radioengineering , 2009,
Abstract: Channel measurement and modeling is an important issue when designing ultra wideband (UWB) communication systems. In this paper, the results of some UWB time-domain propagation measurements performed in modern laboratory (Lab) environments are presented. The Labs are equipped with many electronic and measurement devices which make them different from other indoor locations like office and residential environments. The measurements have been performed for both line of sight (LOS) and non-LOS (NLOS) scenarios. The measurement results are used to investigate large-scale channel characteristics and temporal dispersion parameters. The clustering Saleh- Valenzuela (S-V) channel impulse response (CIR) parameters are investigated based on the measurement data. The small-scale amplitude fading statistics are also studied in the environment. Then, an empirical model is presented for UWB signal transmission in the Lab environment based on the obtained results.
Distance-balanced closure of some graphs
N. Ghareghani,B. Manouchehrian,M. Mohammad-Noori
Mathematics , 2010,
Abstract: In this paper we prove that any distance-balanced graph $G$ with $\Delta(G)\geq |V(G)|-3$ is regular. Also we define notion of distance-balanced closure of a graph and we find distance-balanced closures of trees $T$ with $\Delta(T)\geq |V(T)|-3$.
Intersection matrices revisited
N. Ghareghani,E. Ghorbani,M. Mohammad-Noori
Mathematics , 2009,
Abstract: Several intersection matrices of $s$-subsets vs. $k$-subsets of a $v$-set are introduced in the literature. We study these matrices systematically through counting arguments and generating function techniques. A number of new or known identities appear as natural consequences of this viewpoint; especially, appearance of the derivative operator $d/dz$ and some related operators reveals some connections between intersection matrices and the "combinatorics of creation-annihilation". As application, the eigenvalues of several intersection matrices including some generalizations of the adjacency matrices of the Johnson scheme are derived; two new bases for the Bose--Mesner algebra of the Johnson scheme are introduced and the associated intersection numbers are obtained as well. Finally, we determine the rank of some intersection matrices.
Page 1 /198200
Display every page Item


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