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Temporal Evolution of Local Scour Depth around Side-by-side Piers
Neshat Movahedi,Amir Ahmad Dehghani,Mohammad Javad Aarabi,Abdul Reza Zahiri
Journal of Civil Engineering and Urbanism , 2013,
Abstract: Due to geotechnical and economic considerations, bridge designs often lead to use complexpiers or pier groups. The estimation of temporal evolution of scour around bridge pier is important fordesign of bridge foundation. This study focuses on temporal variation of scour depth around two side-bysidepiers with various distances between piers. Based on experimental data, an equation was developedbased on new definition of equivalent pier diameter in Kothyari et al. (2007) equation for estimating thetime evolution of scour depth by taking into account the effect of space between the piers. The results showthat good agreement exists between proposed equation and measured scour data. It is also revealed that byincreasing the distance between piers, the equilibrium scour depth around side by side piers decreases andclose to values of single pier and scour depth reached to the isolated pier when G/D=6.
Diagnostic Accuracy of Sixty Four Multi-Slice CT Angiography in the Assessment of Arterial Cut- Off and Run-Off in Comparison with Surgical Findings As Standard of Reference
Ali Reza Zahiri,Mohammad Bodaghabadi
Iranian Journal of Radiology , 2011,
Abstract: Background/Objective: The accurate anatomic"nmapping and determination of the severity of arterial"ndisease which is an important health problem of the"nelderly is of great significance. We aimed to determine"nthe diagnostic value of 64-multislice CT angiography"n(MSCTA) in arterial disease in run off and cut off"nsites, taking into consideration the results of surgical"nfindings of our study as a standard of reference."nPatients and Methods: Over the period from March"n2007 to February 2009, MSCTA followed by an"noperative intervention was carried out in a total of 38"npatients with clinical signs and symptoms suggestive"nof arterial disease who all had the vascular surgery"nindication. The mean age of patients was 34±15.86"n(range, 23 to 93) years. MSCTA was executed using"na 64-slice CT scanner, during the arterial phase of"ninjecting the nonionic contrast medium with a power"ninjector, at the rate of 5 ml/sec into the antecubital vein"nand exploration and revascularization of peripheral"narterial disease was performed intraoperatively."nResults: The most common cause of vascular occlusion"nwas atherosclerosis and the arterial disease was more"ncommon in the lower extremities. The most frequent"nsite of stenosis due to MSCTA findings was in the"nsuperficial femoral artery. Spearman's correlation"ncoefficients showed a high grade of agreement"namongst the raters. The sensitivity, specificity,"npositive predictive value (PPV), negative predictive"nvalue (NPV) and the accuracy of MSCTA compared"nto surgery were 83.8%, 96%, 96.8%, 81.3% and 89%,"nrespectively. MSCTA findings were compared with"nsurgery as a standard of reference which showed"nconcordance in the majority of cases (81.6%). Cut off"nsites were correctly identified by MSCTA in 97.3% of"nthe patients and the most common sites of discordance"nobserved in our study were in run off sites (18.2%)."nConclusion: MSCTA angiography, as a novel"ndiagnostic modality, could be a suitable alternative and"nmay be a viable choice, for routine clinical diagnosis.
The Edge Version of Degree Based Topological Indices of p NAqp Nanotube  [PDF]
Xiujun Zhang, Wasim Sajjad, Abdul Qudair Baig, Mohammad Reza Farahani
Applied Mathematics (AM) , 2017, DOI: 10.4236/am.2017.810105
Abstract: Chemical graph theory is an important branch of mathematical chemistry which has wide range applications. In chemical graph theory a molecular graph can be recognized by a numerical quantity which is called a Topological index. Topological indices have some major classes but among these classes degree based topological indices have prominent role in chemical graph theory. In this paper we compute the edge version of some important degree based topological indices like Augmented Zagreb Index, Hyper-Zagreb Index, Harmonic Index and Sum-Connectivity Index of NAqp Nanotube.
Effects of stress management training and problem solving on quality of life and life expectancy among infertile women
Mohammad Reza Zarbakhsh Bahri,Zahra Shoa Hasani,Ziba Zahiri Sorori,Farideh amirsadat Hafshejani
Pajouhan Scientific Journal , 2013,
Abstract: Introduction: This study aims to evaluate the effectiveness of stress management training and problem-solving training on quality of life and life expectancy of infertile women was conducted.Material and Methods: The method of this study was experimental with pretest – posttest design with a control group. population of 400 infertile women who referred to infertility center in Rasht were randomized to 250 of them were selected and the quality of life and life expectancy of the study were the 45 members of the quality of life and life expectancy lower were more randomly in three groups of 15 people, including two experimental groups and one control group were replaced. Each experimental groups were trained for 10 sessions of 90 minutes, respectively, stress management and problem-solving. Upon completion of the training program, participants were assessed again.Results: The result of present study showed that there was a significant difference between the experimental groups and control group in the scores of quality of life and life expectancy (p<0.05) while there was no significant difference between 2 experimental groups in these scores (p>0.05).Conclusion: Stress management and problem solving training were effective on life expectancy and quality of life of infertile women but there was no significant difference between the effectiveness of these two methods on life expectancy and quality of life of infertile women.
Phylogeny and Evolution of Pharmacophagy in Tiger Moths (Lepidoptera: Erebidae: Arctiinae)
Jennifer M. Zaspel, Susan J. Weller, Charles T. Wardwell, Reza Zahiri, Niklas Wahlberg
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0101975
Abstract: The focus of this study was to reconstruct a phylogenetic hypothesis for the moth subfamily Arctiinae (tiger moths, woolly bears) to investigate the evolution of larval and adult pharmacophagy of pyrrolizidine alkaloids (PAs) and the pathway to PA chemical specialization in Arctiinae. Pharmacophagy, collection of chemicals for non-nutritive purposes, is well documented in many species, including the model species Utetheisa ornatrix L. A total of 86 exemplar ingroup species representing tiger moth tribes and subtribes (68 genera) and nine outgroup species were selected. Ingroup species included the most species-rich generic groups to represent the diversity of host-plant associations and pharmacophagous behaviors found throughout Arctiinae. Up to nine genetic markers were sequenced: one mitochondrial (COI barcode region), one nuclear rRNA (D2 region, 28S rRNA), and seven nuclear protein-coding gene fragments: elongation factor 1-α protein, wingless, ribosomal protein subunit S5, carbamoylphosphate synthase domain regions, glyceraldehyde-3-phosphate dehydrogenase, isocitrate dehydrogenase and cytosolic malate dehydrogenase. A total of 6984 bp was obtained for most species. These data were analyzed using model-based phylogenetic methods: maximum likelihood (ML) and Bayesian inference (BI). Ancestral pharmacophagous behaviors and obligate PA associations were reconstructed using the resulting Bayes topology and Reconstructing Ancestral States in Phylogenies (RASP) software. Our results corroborate earlier studies on the evolution of adult pharmacophagous behaviors, suggesting that this behavior arose multiple times and is concentrated in the phaegopterine-euchromiine-ctenuchine clade (PEC). Our results suggest that PA specialization may have arisen early in the phylogeny of the subfamily and that facultative larval pharmacophagous behaviors are the derived condition.
Updates on the Utility of Diagnostic Laparoscopy in the Management of Pneumatosis Intestinalis: An Improvement to the Current Treatment Algorithm
Brooke Buckley,Cristina Feather,H. Reza Zahiri,Jennifer Wormuth,Michael N. Tran,Sapna Brown,Zachary Sanford
- , 2018, DOI: 10.1177/1553350618803742
Abstract:
Traffic Engineering Based on Effective Envelope Algorithm on Novel Resource Reservation Method over Mobile Internet Protocol Version 6
Reza Malekian,Abdul Hanan Abdullah
Computer Science , 2012,
Abstract: The first decade of the 21st century has seen tremendous improvements in mobile internet and its technologies. The high traffic volume of services such as video conference and other real-time traffic applications are imposing a great challenge on networks. In the meantime, demand for the use of mobile devices in computation and communication such as smart phones, personal digital assistants, and mobile-enabled laptops has grown rapidly. These services have driven the demand for increasing and guaranteing bandwidth requirements in the network. A direction of this paper is in the case of resource reservation protocol (RSVP) over mobile IPv6 networks. There are numbers of proposed solutions for RSVP and quality of service provision over mobile IPv6 networks, but most of them using advanced resource reservation. In this paper, we propose a mathematical model to determine maximum end-to-end delay bound through intermediate routers along the network. These bounds are sent back to the home agent for further processing. Once the home agent receives maximum end-to-end delay bounds, it calculates cumulative bound and compares this bound with the desired application end-to-end delay bound to make final decision on resource reservation. This approach improves network resource utilization.
Imaging Finding in 222 Patients with Vestibular
A. Zahiri
Iranian Journal of Radiology , 2008,
Abstract: Background/Objective: Vestibular Schwannoma is the most common cranial schwannoma with gradually produce sensorineural deafness. In this study we observed the effect of Gamma Knife therapy for control of this type of schwannoma."nPatients and Methods: We observed imaging findings of 250 patients with vestibular schwannoma from September 2003 to October 2007. We performed the Gamma Knife with C model (Elekta Company) for the treatment and control of the tumor."nResults: The minimum age of our patients was 14 years and maximum age was 90 years. Twenty six patients was N.F.2, and female to male ratio was 2/1. The most common imaging finding was loss of central contrast enhancement in contrast MRI beginning after nine months after Gamma Knife. Loss of volume and cystic changes were other imaging findings and regrowth of tumor was seen in same case. After three years follow up, tumor control, tumor regression, and tumor enlargement were seen in 85%, 10%, and 5% of our patients respectively."nConclusion: Gamma Knife should be considered as a suitable treatment option for the treatment of Vestibular Schwannoma.
A Transcontinental Challenge — A Test of DNA Barcode Performance for 1,541 Species of Canadian Noctuoidea (Lepidoptera)
Reza Zahiri, J. Donald Lafontaine, B. Christian Schmidt, Jeremy R. deWaard, Evgeny V. Zakharov, Paul D. N. Hebert
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0092797
Abstract: This study provides a first, comprehensive, diagnostic use of DNA barcodes for the Canadian fauna of noctuoids or “owlet” moths (Lepidoptera: Noctuoidea) based on vouchered records for 1,541 species (99.1% species coverage), and more than 30,000 sequences. When viewed from a Canada-wide perspective, DNA barcodes unambiguously discriminate 90% of the noctuoid species recognized through prior taxonomic study, and resolution reaches 95.6% when considered at a provincial scale. Barcode sharing is concentrated in certain lineages with 54% of the cases involving 1.8% of the genera. Deep intraspecific divergence exists in 7.7% of the species, but further studies are required to clarify whether these cases reflect an overlooked species complex or phylogeographic variation in a single species. Non-native species possess higher Nearest-Neighbour (NN) distances than native taxa, whereas generalist feeders have lower NN distances than those with more specialized feeding habits. We found high concordance between taxonomic names and sequence clusters delineated by the Barcode Index Number (BIN) system with 1,082 species (70%) assigned to a unique BIN. The cases of discordance involve both BIN mergers and BIN splits with 38 species falling into both categories, most likely reflecting bidirectional introgression. One fifth of the species are involved in a BIN merger reflecting the presence of 158 species sharing their barcode sequence with at least one other taxon, and 189 species with low, but diagnostic COI divergence. A very few cases (13) involved species whose members fell into both categories. Most of the remaining 140 species show a split into two or three BINs per species, while Virbia ferruginosa was divided into 16. The overall results confirm that DNA barcodes are effective for the identification of Canadian noctuoids. This study also affirms that BINs are a strong proxy for species, providing a pathway for a rapid, accurate estimation of animal diversity.
Probing planetary biodiversity with DNA barcodes: The Noctuoidea of North America
B. Christian Schmidt,Evgeny V. Zakharov,J. Donald Lafontaine,Jeremy R. deWaard,Paul D. N. Hebert,Reza Zahiri
- , 2017, DOI: 10.1371/journal.pone.0178548
Abstract:
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