منابع مشابه
To Have or Not To Have a Pet for Better Health?
BACKGROUND Pet ownership is thought to have health benefits, but not all scientific explorations have been founded on proper applications of representative samples or statistically correct methodologies. Databanks have been too small for proper statistical analyses; or, instead of a random sample, participation has been voluntary. The direction of causality has been evaluated incorrectly or con...
متن کاملTo have or not to have Internet at home: Implications for online shopping
This paper analyzes the individual decision of online shopping, in terms of socioeconomic characteristics, internet related variables and location factors. Since online shopping is only observed for internet users, we use the two-step Heckmans model to correct sample selection. We argue that one of the relevant variables to explain online shopping, the existence of a home internet connection, ...
متن کاملFood fortification: good to have or need to have?
Only very small quantities of vitamins and minerals are needed for human health but deficiencies can have disproportionately large, often life-threatening, effects. Micronutrient deficiencies lead to a vicious cycle of malnutrition and infection in poorly nourished populations. Fortification of staple foods is the cheapest, most efficient and most effective way to supply large populations with ...
متن کاملComparison of emotional intelligence and adaptability, in students who have kindergarten experienced and those who have not experienced
Purpose: The purpose of current study is to compare the emotional intelligence and adaptation of pre-school students who have experienced kindergarten with those who have not experienced it. The study population includes all junior high school students of Robat Karim, Tehran. The present study sample was stratified random sampling method and was randomized equally disproportionate between stud...
متن کاملTo Have and Have Not: Intrinsic Platelet Hyperreactivity?
C oronary artery disease is a complex and progressive disease process involving plaque and thrombus formation. The key role of thrombus formation was identified several years ago and is considered not only critical for plaque growth but also as a cause of acute coronary syndrome (ACS). Platelets are key drivers of these events. They have several activation pathways, and some of them have emerge...
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ژورنال
عنوان ژورنال: Science
سال: 2006
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.313.5795.1855a