For the past 3 decades adolescent healthcare providers have used HEADSS, which focuses on the psychological perspective, and hence, some modifications have been used by physicians thereof. This is a proposal to use &q...For the past 3 decades adolescent healthcare providers have used HEADSS, which focuses on the psychological perspective, and hence, some modifications have been used by physicians thereof. This is a proposal to use "HI ADOLESCENTS", an acronym that expands on the psychosocial areas to be more inclusive and to address physical and spiritual aspects as well. We believe this will be effective with a larger spectrum of adolescents.展开更多
Nowadays English is more and more popular. There are a lot of books teaching people how to learn English. But it should be noted that although English is easy to learn,it is difficult to master. This paper analyzes th...Nowadays English is more and more popular. There are a lot of books teaching people how to learn English. But it should be noted that although English is easy to learn,it is difficult to master. This paper analyzes the reason why it is hard to master from three aspects:speech sounds,vocabulary,grammar.In this paper a large number of examples are given to illustrate the difficulties to master English.展开更多
Nitro MAC（French acronym for continuous atmospheric measurements of nitrogenous compounds） is an instrument which has been developed for the semi-continuous measurement of atmospheric nitrous acid（HONO）. This inst...Nitro MAC（French acronym for continuous atmospheric measurements of nitrogenous compounds） is an instrument which has been developed for the semi-continuous measurement of atmospheric nitrous acid（HONO）. This instrument relies on wet chemical sampling and detection using high performance liquid chromatography（HPLC）-visible absorption at540 nm. Sampling proceeds by dissolution of gaseous HONO in a phosphate buffer solution followed by derivatization with sulfanilamide/N-（1-naphthyl）-ethylenediamine. The performance of this instrument was found to be as follows： a detection limit of around 3 ppt with measurement uncertainty of 10% over an analysis time of 10 min. Intercomparison was made between the instrument and a long-path absorption photometer（LOPAP） during two experiments in different environments. First, air was sampled in a smog chamber with concentrations up to 18 ppb of nitrous acid. Nitro MAC and LOPAP measurements showed very good agreement. Then, in a second experiment, ambient air with HONO concentrations below250 ppt was sampled. While Nitro MAC showed its capability of measuring HONO in moderate and highly polluted environments, the intercomparison results in ambient air highlighted that corrections must be made for minor interferences when low concentrations are measured.展开更多
文摘For the past 3 decades adolescent healthcare providers have used HEADSS, which focuses on the psychological perspective, and hence, some modifications have been used by physicians thereof. This is a proposal to use "HI ADOLESCENTS", an acronym that expands on the psychosocial areas to be more inclusive and to address physical and spiritual aspects as well. We believe this will be effective with a larger spectrum of adolescents.
文摘Nowadays English is more and more popular. There are a lot of books teaching people how to learn English. But it should be noted that although English is easy to learn,it is difficult to master. This paper analyzes the reason why it is hard to master from three aspects:speech sounds,vocabulary,grammar.In this paper a large number of examples are given to illustrate the difficulties to master English.
基金supported by EU Sixth Framework Programme (FP6) Eurochamp program (grant number 505968)EU Seventh Framework Programme (FP7) Eurochamp-2 program (grant number 228335)+2 种基金the NeoRad program from the French National Agency for Research (ANR-07-2/21-8908)the PhotoBat project from the Primequal program of the French Ministry of Environment (Primequal-project number 19599)the PhotoPaq LIFE + program (LIFE 08/ENV/F/000487 PHOTOPAQ)
文摘Nitro MAC（French acronym for continuous atmospheric measurements of nitrogenous compounds） is an instrument which has been developed for the semi-continuous measurement of atmospheric nitrous acid（HONO）. This instrument relies on wet chemical sampling and detection using high performance liquid chromatography（HPLC）-visible absorption at540 nm. Sampling proceeds by dissolution of gaseous HONO in a phosphate buffer solution followed by derivatization with sulfanilamide/N-（1-naphthyl）-ethylenediamine. The performance of this instrument was found to be as follows： a detection limit of around 3 ppt with measurement uncertainty of 10% over an analysis time of 10 min. Intercomparison was made between the instrument and a long-path absorption photometer（LOPAP） during two experiments in different environments. First, air was sampled in a smog chamber with concentrations up to 18 ppb of nitrous acid. Nitro MAC and LOPAP measurements showed very good agreement. Then, in a second experiment, ambient air with HONO concentrations below250 ppt was sampled. While Nitro MAC showed its capability of measuring HONO in moderate and highly polluted environments, the intercomparison results in ambient air highlighted that corrections must be made for minor interferences when low concentrations are measured.
