نتایج جستجو برای: f43

تعداد نتایج: 227  

2011
Ricardo Hausmann César A. Hidalgo

Much of the analysis of economic growth has focused on the study of aggregate output. Here, we deviate from this tradition and look instead at the structure of output embodied in the network connecting countries to the products that they export. We characterize this network using four structural features: the negative relationship between the diversification of a country and the average ubiquit...

2013
Kazi Ishtiak-Ahmed Aleksander Perski Ellenor Mittendorfer-Rutz

BACKGROUND Stress-related mental disorders (SRMD), which correspond to the diagnostic code F43 in the International Classification of Diseases, version 10, rank among the leading causes of sickness absence in several European countries. Despite the size of this health problem, research on risk factors for severe medical outcomes, like suicidal behavior, is lacking to date. The aim of this study...

Journal: :Atmospheric Chemistry and Physics 2022

Abstract. Seasonal variability of non-refractory PM1 (NR-PM1) was studied at a rural background site (National Atmospheric Observatory Košetice – NAOK) in the Czech Republic to investigate effect regional and long-range atmospheric transport central Europe. NR-PM1 measurements were performed by compact time-of-flight aerosol mass spectrometry (C-ToF-AMS), chemically speciated size distributions...

ژورنال: اقتصاد مالی 2017
بهزاد زمانی کرد شولی سعید منصوریان طبایی سیدمجتبی حسین زاده یوسف آباد

  هدف ازاین مقاله تحلیل تجربی معمای ارائه شده توسط هوریکا و فلدستاین (Feldstain و Horioka) درسال 1980 در بین گروه خاصی از اقتصادهای توسعه یافته بر پایه صادرات نفت کشورهای عضو اوپک همانند ایران، ونزوئلا، عراق، لیبی، اندونزی، الجزایر، کویت، قطر و عربستان طی سال‌های 1970 تا 2009 است. در این مقاله به بررسی رابطه میان پس‌انداز و سرمایه‌گذاری و میزان حساسیت آنها نسبت به دو عامل  درجه آزادی و بزرگی ا...

Journal: :European Psychiatry 2023

Introduction The threat and preservation of the territorial integrity Ukraine are not new issues. During last decade, peacetime (Peace, until 2013) was disrupted by active hostility (AH, 2014–2015) trench warfare (TW, 2016–2021). War exert acute chronic impacts on mental health, may be a substrate for health disorders, especially worrisome since, today, large-scale conflict has demanded recruit...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شاهد - پژوهشکده فنی و مهندسی 1389

خستگی ذهنی به عنوان یک عامل بازدارنده فعالیت ها، یکی از مشکلاتی است انسان امروز با آن روبرو است. هنگامی که فرد در وظایف روزانه خود ملزم به اجرای فعالیت هایی باشد که برای مدت طولانی و با دقت باید انجام پذیرند، پس از مدتی احساس خستگی می کند. در ایجاد این نوع خستگی الزاماً فعالیت جسمی وجود ندارد. بروز خستگی ذهنی آثار متعددی به همراه دارد؛ مانند کاهش کارآیی، توان برنامه ریزی، کنترل کارها و از همه مه...

2015
Tobias Sundberg Laith Hussain-Alkhateeb Torkel Falkenberg

BACKGROUND Stress-related mental disorders (SRMD) are common and costly. Rehabilitation strategies, including pharmacotherapy, may be complicated to evaluate. Previous research has indicated increased quality of life and self-rated health for SRMD patients that receive a combination of conventional and complementary therapies, i.e. integrative care. The aim of this retrospective registry study ...

2000
Margaret S. McMillan William A. Masters

This paper offers a new explanation for why some governments consistently impose such high agricultural tax rates that their revenues decline, and consistently spend what tax revenue they have on things other than productive public investments such as agricultural R&D. We propose an intertemporal political economy model, in which taxes and R&D levels are set in a repeated game between governmen...

2015
Oscar Afonso

a r t i c l e i n f o JEL classification: F43 J31 O31 O33 Keywords: Technological knowledge International trade Human capital Wage inequality By connecting the North–South diffusion and the bias of non-scale technological knowledge and by considering endogenous human capital, we relate the technological-knowledge diffusion with levels, inter-country gaps, growth rates, wage-inequality paths and...

2015
Oscar Afonso Pedro Mazeda Gil

a r t i c l e i n f o JEL classification: F16 F43 J24 J31 O31 O33 Keywords: North–South trade Technological knowledge Human capital Wage inequality This paper develops an endogenous growth model with technological knowledge directed towards high-versus low-skilled labour, augmented with North–South international trade of intermediate goods and with human-capital accumulation, to analyse how tra...

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