436 research outputs found
Antecedents of trust in international joint ventures' (IJVS) performance in developing countries: A review of empirical evidence
No full textTrust in international joint venture has received much attention for the last 20 years. This study highlights the importance of social capital in international joint ventures (IJVs) in developing countries. This paper assesses the impact of antecedents of trust on performance of international joint ventures in developing countries, which is based on social exchange theory. Little attention has been paid to exploring the concept in IJV. The impacts of components of inter partner-fits and relational factors on trust and the effect of trust on performance of IJVs will be considered. In addition the impact of religion and country risk on level of trust in IJVs in these countries will be evaluated. A framework has been developed based on this review analyses and integrates empirical evidence in order to identify convergence and conflict in IJV. The paper addresses a problem of relevance to both international academics and practitioners in addressing managerial implications. It is hoped that the study will provide a meaningful implication to the process of selection of IJV partners
Erythraeus (Zaracarus)
No full textKey to species of the subgenus Erythraeus (Zaracarus) of the world (larva) [modified from Mahmoudi et al. (2014) with corrections] 1. fn BFe 3-3-3 or 3-3-2 ……...…………………..……………………………………………...….. 2 – fn BFe 2-2-2 ………………..…………………………………………………………………… 18 2. BFe 3-3-2 ……………...…….…………………………………...…. E. (Z.) plumatus Beron, 2008 – BFe 3-3-3 ……...............……..……………………………………...…………………………… 3 3. Ti III 271 ………………………………………………….……………………………...…….. 4 4. Ti III> 420 ……………………………………………………..………………………………… 5 – Ti III 439 …………………………………………………………………………….……...….. 7 6. Ti III 420, Ti II with 14 normal setae ………………...…….......… E. (Z.) fabiolae Haitlinger, 1997 – Ti III 424, Ti II with 15 normal setae ……….……..... E. (Z.) longipedus Saboori & Nowzari, 2001 7. Ti III 439–511, Ti II and III with 14 normal setae, AL with swelling near bases ……………...……. ………………………………..…..…………..……………..… E. (Z.) adrianicus Haitlinger, 2012 – Ti III 470–484, Ti II and III with 15 normal setae, AL without swelling near bases..………………. ……..………………………….……...…. E. (Z.) hafezi Saboori, Hakimitabar & Mahmoudi, 2014 8. Ti III 271–278, Ti III with 16 normal setae ……………………..………………………………….. ……...………….............................................................….. E. (Z.) perpusillus Kamran et al., 2009 – Ti III> 346, Ti III with less than 16 setae ……………….……………………………….……… 9 9. NDV 68, fD 54 …………………………………………...….. E. (Z.) kastaniensis Haitlinger, 2006 – NDV <61, fD <42 ………………………………………………..…………………………….. 10 10. AL without swelling near bases …………..…………………………………………………… 11Published as part of Noei, Javad, Maroufpoor, Mostafa, Faizi, Fardin & Ostovan, Hadi, 2017, Second record of Erythraeus (Zaracarus) coleopterus (Acari: Erythraeidae) from Iran with new morphological data, pp. 71-80 in Persian Journal of Acarology 6 (2) on page 76, DOI: 10.22073/pja.v6i2.29406, http://zenodo.org/record/463406
7th International Congress of Child and Adolescent Psychiatry
No full textThe 7th International Congress of Child and Adolescent Psychiatry 12-14 May 2015, Tehran, Iran Shahid Beheshti University of Medical Sciences, Tehran Conference Theme: Violence Prevention and Promotion of Mental Health Head of Congress: Mehdi Tehrani-Doost, M.D Scientific Secretary: Rozita Davari Ashtiani, M.D Executive Secretary: Katayoun Razjouyan, M.D Executive Manager: Fahima Farrahi The Scientific Committee: Nasrin Sarraf, Arsia Taghva, Sorur Arman, Mohammad reza Eslami, Mahin Eslami, Taghi esmaeeli, Soheila Emami, Shahrokh Amiri, Nasrin Amiri, Houshang Amirian, Mehdi Bina, Noushin Parvaresh, Ashraf Tashakori, Reza Tavakolian, Mehdi Tehrani doost, Seyed Ahmad Jalili, Behrouz Jalili, Mitra Joudi, Paria Hebrani, Nastaran Habibi, Shahram Heidari, Katayoun ,Khoushabi, Rozita Davari Ashtiani, Firouzeh Derakhshanpour, Nasrin Dodangi, Shokoufeh Radfar Katayoun Razjouyan, Forough Riahi, Ghazal Zahed, Elham Salari, Zahra Sepehrmanrsh, Atefeh Soltanifar, Hassan Shahrokhi, Arefeh Shefaat, Fereshteh Shakibaee, Mitra Hakim Shoshtari, Zahra Shahrivar, Elham Shirazi, Ali Alavi shooshtari, Mohammadali Sahebi, Afsaneh Sehat, Seyed Saeed Sadr, Mohammadreza Sadrameli, Nasrin Saraf, Parvin Safavi, Alireza Zahiroldin, Abdolahian, Fariba Arabgol, Fatemeh Asarian, Abbas Attari, Anita Alaghmand, Mohammad Effatpanah, Marzieh ,Assareh, Javad Alaghbandrad, Ahmad Ghanizadeh, Hossein Faker, Mahboobeh Firuzkuhi Mohammadreza Kazemi, Afsaneh Karbasi Amel, Arezou Kiani, Maryam Kipour, Ayub Malek, Fatemeh Mohareri, Mohammadreza Mohammadi, Mehrdad Mohammadian, Maryam Mahmoudirad, Javad ,Mahmoudi Gharaee, Azadeh Mazaheri, Shirin Moalemi, Shokufeh Mousavi, Masoumeh Mousavi Parviz Molavi, Niloufar Mahdavi, Javad Golmirzaee, Mostafa Najafi, Gholamreza Noourazar, Peyman Hashemian, Hamid Yaghubi, Maryam Kousha The Executive Committee: Mehdi Tehranidoost, Katayoun Razjouyan, Zahra Shahrivar, Javad ,Golmirzaee, Javad Mahmoudi Gharaee,Fahima Farrahi, Mojgan Khademi, Firouzeh Jafari ,Mohammadreza Eslami, Mohammad Amin Sattari, Shokoufeh Saffari, Azadeh Sadat Kheradmand Nahid Borna, Anahita Rezaee, Fatemeh Gholipour, Afshin Soleimanpour, Fahima Farrahi, Maziar ,Malekpour, Gilda Rajabi ,Damavandi, Hedie Farrahi, Hamed Mazaheri, Sina Zarrini, Helia Tarighatnia Mahya Seyed Safizadeh, Samira Sadeghi Parvin, Masoumeh Fadavi, Shadi Ansari, Hengameh Hosseini, Farzad Kashefi, Amirali Fadavi, Maziar Malekpoor, Elmira Bonyadi, Ashkan Abolhala
Direct hybridization and bioinformatics analysis of circulating microRNAs in patients with Alzheimer’s disease under intravenous trehalose treatment
No full textTrehalose has been proposed as a possible therapeutic option for attenuating the neuropathological changes associated with neurodegeneration, including Alzheimer's disease (AD). The administration of trehalose in human and murine models was linked to restoring antioxidant status, decreasing lipoperoxidation, and alleviating neuroinflammation. This latter biochemical mechanism was associated with the upregulation of specific brain-enriched microRNAs (miRNA). Herein, using a direct hybridization approach, we evaluate trehalose intravenous treatment in AD patients, conducting a phase two clinical trial (IRCT20130829014521N15) examining the alteration of microRNA profiles before and after the treatment. Twenty patients were recruited and randomly assigned to two groups: the intervention group received 15 g/week of intravenous trehalose. The control group received placebo in the form of normal saline. The period chosen was 12 weeks. Blood samples were obtained at the beginning and end of the study. Circulating microRNAs expression data between the placebo and treatment groups were assessed using microarray analysis. Subsequently, differentially expressed (DE) miRNAs specific to the trehalose-treated group were identified, and their gene targets were determined by bioinformatics-based approaches. The analysis of DE miRNAs pointed out modulation in unique miRNAs between treatment and placebo groups. Specifically, hsa-miR-1268a, −3605-3p, −555, and −6511a-3p were significantly downregulated, while hsa-miR-324-3p and −539-5p showed significant upregulation. Of the 147 overlapped validated genes identified in the bioinformatics analysis, several are related to autophagy, protein aggregation, oxidative stress, and inflammation. KEGG enrichment pathways reveal regulation of actin cytoskeleton, axon guidance, and neurotrophin signaling pathways. The results identify significant modulation in unique miRNAs in AD patients under trehalose. These findings suggest the potential utility of these microRNAs as biomarkers for trehalose pharmacological monitoring in AD
Prediction of clear water local scour at bridge piers
No full textLAUREA MAGISTRALELa funzionalità delle infrastrutture è cruciale per la società moderna e ogni fallanza delle stesse provoca conseguenze negative per l’economia e il benessere dei cittadini. I ponti fluviali non fanno eccezione, dal momento che eventuali danneggiamenti o crolli di queste strutture possono provocare ingenti danni, isolamento di territori e perdite di vite umane. La vulnerabilità dei ponti dipende da diversi fenomeni, tra i quali si possono includere i processi erosivi localizzati.
A dispetto della grande mole di ricerche condotte su questi fenomeni, non sono ancora disponibili equazioni per la previsione dell’evoluzione temporale dell’erosione, che possano ritenersi di validità generale. Molto spesso la validità delle formule disponibili è limitata agli esperimenti condotti per ottenerle.
In questo lavoro è stato analizzato un ampio campione di dati di letteratura, per il caso dell’erosione a una pila circolare in condizioni di acque chiare. È stata stimata una nuova equazione con l’obiettivo di rappresentare il complesso dei dati.
I dati proposti dai singoli autori non sono in generale omogenei, perché ottenuti tramite procedure sperimentali diverse e inquadrati in schemi di riferimento diversi. È stato dunque necessario un lavoro di omogeneizzazione dei parametri. Uno di quelli più importanti è la velocità del flusso, che alcuni autori considerano media sulla sezione trasversale e altri sulla profondità. I valori di velocità sono stati convertiti laddove necessario. Un opportuno inquadramento adimensionale è stato usato per individuare i parametri di maggiore importanza: la snellezza della pila in relazione alla profondità della corrente, la dimensione dell’ostacolo rispetto a quella dei sedimenti, l’intensità del flusso rispetto alle condizioni critiche, e il tempo. La formula finale proposta è costituita da una produttoria di funzioni dei singoli parametri.
La capacità della formula di prevedere i valori di erosione è stata confrontata con quella di analoghi strumenti disponibili in letteratura, riscontrando un generale miglioramento.
Parole chiave: Pila di ponte; Erosione localizzata; Evoluzione temporale; Stima dell’erosione.In modern societies, the normal life of people is highly dependent on the operation of the infrastructures. Any disruption to the normal performance of these critical infrastructures can have negative impacts on the economy of the society and the welfare of the citizens.
Bridges at river crossings, being one of the most important and vital infrastructures, are prone to a major damage during floods. Damage can be caused by various reasons; one of the main ones is riverbed scour at bridge foundations. The damage can range from minor erosion to complete failure of the bridge structure which can lead to death casualties and isolation of entire areas.
In spite of the extensive research efforts on this topic, a general equation which can be able to predict the temporal evolution of scour depth is still missing due to the fact that the existing formulae are manly appropriate for the experiments that they are developed for.
In this work, an extensive data set for long-duration, clear-water pier scour experiments has been considered. Data from several authors were used to fit a novel predictive equation for the temporal development of the maximum scour depth at a circular pier.
Since the mentioned data by different authors were included in different frameworks, it was necessary to make them homogeneous and present them with the same parameters. In this respect, the approach flow velocity was one of the most influential parameters for the scour trend; some authors used a cross-sectional average flow velocity, some others used instead a depth-averaged value at mid-channel. Therefore, values were converted whenever necessary. A dimensionless framework was considered to highlight the most relevant parameters; the final predictive equation was the product of functions of the individual parameters. The most important dimensionless parameters were the flow shallowness, the sediment coarseness, the ratio of the flow velocity to the critical one, and the dimensionless time.
The performance of the estimated scour function was finally compared to that of previous literature equations, documenting a general improvement of prediction capabilities.
Author keywords: Bridge piers; Local scour; Temporal evolution; Scour prediction
Energy TCD - robust and simple failure prediction unifying the TCD and ASED criterion
No full textRobust and simple failure prediction is a relevant and active field of research. The present work aims at unifying the Theory of Critical Distances (TCD) and Averaged Strain Energy Density (ASED) criterion. The proposed Energy TCD is formulated along with analytical expressions for the characteristic length scales and validated using experimental data. On this data set, the accuracy of the Energy TCD is similar to that of the classical methods. Most importantly, the presented methods allow to transfer the point-based calibration technique from notched specimens, which is common for the TCD, to the Energy TCD ASED criterion. © 2022 The Author(s
Experimental thermal-hydraulic study of a supercritical CO2 natural circulation loop
No full textExperimental thermal-hydraulic study of a rectangular supercritical CO2 natural-circulation loop with a horizontal heated channel was conducted at different steady-state conditions. These included different system pressures and three different inlet temperatures, with different inlet and outlet valve openings. Approximately, 450 experimental steady-state data-points were collected. The data include measurements of pressure-drop along the heated channel, pressure-drop across inlet and outlet valves, applied heat on the heated channel, pressure, temperature and flow-rate. Steady-state curves of mass flow-rate versus power, outlet temperature versus power, and detailed information of frictional pressure drop and local head loss coefficients were produced. Comparison showed that for the available experimental set-up, computed frictional pressure-drops fell within 1-1.20 of the Blasius formula prediction. Moreover, flow oscillations were observed in several cases when outlet temperature of CO2 was higher than the pseudo-critical temperature on the negative slope part of the mass flow-rate versus power curve.May 201
Correction to: Curcumin: a modulator of inflammatory signaling pathways in the immune system (Inflammopharmacology, (2019), 27, 5, (885-900), 10.1007/s10787-019-00607-3)
No full textUnfortunately, the 4th author name was incorrectly published in the original article. The complete correct name is given below. Mohammad Javad Mousav
Reliability Assessment of Power Distribution Networks Considering Covid-19 Pandemic
No full textThe reliability of power distribution networks can be threatened due to the health of repair crews. Covid-19 is a nowadays challenge that affects the health and the availability of repair crews. Monte Carlo simulation is implemented in this paper to evaluate the reliability of power distribution networks considering Covid-19. This paper alerts the power distribution companies to consider some strategies to prevent the growth of expected energy not served (EENS) during the pandemics era such as Covid-19
- …
