Stick insects can usually be seen doing one of two unexciting things: standing still or walking. During walking, stepping movements are generally considered to be governed by one to several control centres associated with the joints that make up each leg. In order to walk in a coordinated fashion, the activity of these control centres must be synchronised, so that all the joints in one leg are ...

The concept of situations has a long past, but the conceptualization of situations only has a short history. This article provides a survey of the concept of situations. Based upon Milgram’s [Human Relations 18 (1965), 57] vision toward ‘a compelling theory of situations,’ the authors examine the concept of situations in three specific literatures: definitions of situations, taxonomies of situa...

The present research explores situations that demonstrate enhancing effects on motivation based on the amount of choice seen by individuals. Individuals who are intrinsically motivated see more choice in certain academic settings, including those that foster self-regulation and autonomy. Extrinsically motivated individuals are predicted to see more promise in reward and external regulation stra...

OBJECTIVE To review the indications, contraindications and efficacy of vaccination in some special situations: immunosuppression, prematurity, pregnancy and post-exposure situations. SOURCES OF DATA Systematic review of articles published during the two last decades, found in MEDLINE, SciELO and Lilacs databases; guidelines of Programa Nacional de Imunizações (Brazilian National Immunization ...

Clouds are one of the main regulating factors of the Earth’s climate through scattering and absorption of solar radiation as well as emission and absorption of thermal radiation. In consequence, the study of cloud properties is extremely important for understanding their role in climate change mechanisms. Specifically, aerosol particles, natural or anthropogenic, influence cloud-related process...

most scientists believe that the phenomenon of global warming occurred, however, in the case of the occurrence of this phenomenon by some environmental scientists have raised doubts. they are questioning global warming by arguing that the temperature recorded at the weather stations cannot be representative of the occurrence of the temperature rise. because with the passage of time and the incr...

carbon sequestration in soil, leaf and litter of three tree species, viz. eucalyptuscamaldulensis, prosopisjuliflora and ziziphus spina-christi, plantation was investigated in the dehloran city, iran. results showed that the amount of sequestered c in leaf, litter and soil was significantly different among these species. the highest amount of sequestrated c was in leaf and the lowest amount in ...

INTRODUCTION........................................................................................................................... 1 OVERVIEW OF ATMOSPHERIC VOC OXIDATION ............................................................... 2 CURRENT STATE OF KNOWLEDGE ........................................................................................ 4 Inorganic Reactions.....................