نتایج جستجو برای: f40

تعداد نتایج: 102  

ژورنال: علمی شیلات ایران 2017

هدف از این مطالعه تعیین میزان زیتوده کیلکای معمولی Clupeonella cultriventris Borodin,1904 طی سالهای 1376 الی 1392 و سقف قابل برداشت این ماهی در سال 1392 در سواحل ایرانی دریای خزر می باشد. در این تحقیق، حداکثر محصول قابل برداشت (MSY) و میزان تلاش صیادی در MSY (fMSY) مورد ارزیابی قرار گرفته و سپس با استفاده از شاخصهای fMSY ، تولید  به ازای نسل نوپا و  زی توده مولدین به ازای نسل نوپا با استراتژی م...

2002
Qi Su

The paper enquires into the relationship between economic inequality and economic growth, but different from others, it also studies the relationship between inequality and economic growth in the situation where consideration of effect of factor movement is included. The paper tends to answer the questions such as whether inequality should be eradicated completely. Panel data models are used fo...

2012
Pravin Krishna Andrei A. Levchenko

Less developed countries tend to experience higher output volatility, a fact that is in part explained by their specialization in more volatile sectors. This paper proposes theoretical explanations for this pattern of specialization – with the complexity of the goods playing a central role. Specifically, less developed countries with lower institutional ability to enforce contracts, or alternat...

2001
Fabrizio Perri Vincenzo Quadrini

In Italy, as in many other countries, the years immediately after 1929 were characterized by a major slowdown in economic activity. We argue that the depth and duration of the crisis cannot be explained solely by productivity shocks. We present a model in which trade restrictions together with wage rigidities produce a significant slowdown in economic activity. The model is also consistent with...

2015
Demba Fofana

This paper presents a new framework to analyze the effects of some economics factors on the U.S. distribution of wages. The paper seeks to specifically find the contributing factors of wage inequality and show how differently these factors influence wage dynamics at various points of the distribution. This paper provides valuable information of where in the wage distribution dynamics these fact...

Journal: :Respiratory care 2015
Giorgio Conti Cesare Gregoretti Giorgia Spinazzola Olimpia Festa Giuliano Ferrone Flora Cipriani Marco Rossi Marco Piastra Roberta Costa

BACKGROUND In adults and children, patient-ventilator synchrony is strongly dependent on both the ventilator settings and interface used in applying positive pressure to the airway. The aim of this bench study was to determine whether different interfaces and ventilator settings may influence patient-ventilator interaction in pediatric models of normal and mixed obstructive and restrictive resp...

Journal: :Thermal Science 2022

We use fuel oil as an alternative in compression ignition engines without modification. In this study, we performed tests at different engine speeds using diesel blends a engine. Energy and exergy analysis was carried out the performance emission values got from these tests. Through energy analysis, distribution of determined thermal efficiency calculated. The highest is 34.76% on F40 2250 rpm....

ژورنال: :علمی شیلات ایران 0
حسن فضلی h fazli ساری، فرح آباد، پژوهشکده اکولوژی دریای خزر علی اصغر جانباز a.a janbaz ساری، فرح آباد، پژوهشکده اکولوژی دریای خزر شهرام قاسمی s ghasemi تهران، موسسه علوم تحقیقاتی کشور

هدف از این مطالعه تعیین میزان زیتوده کیلکای معمولی clupeonella cultriventris borodin,1904 طی سالهای 1376 الی 1392 و سقف قابل برداشت این ماهی در سال 1392 در سواحل ایرانی دریای خزر می باشد. در این تحقیق، حداکثر محصول قابل برداشت (msy) و میزان تلاش صیادی در msy (fmsy) مورد ارزیابی قرار گرفته و سپس با استفاده از شاخصهای fmsy ، تولید  به ازای نسل نوپا و  زی توده مولدین به ازای نسل نوپا با استراتژی م...

Journal: :J. Economic Theory 2004
Ricardo J. Caballero Arvind Krishnamurthy

Emerging economies are often exposed to sudden shortages of international financial resources. Yet domestic agents do not seem to take preventive measures against these sudden stops. We highlight the central role played by the limited development of ex ante (insurance) and ex post (spot) domestic financial markets in generating this collective undervaluation of international resources. We study...

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