ON THE REE ACROSS THE PERMIANTRIASSIC BOUNDARY IN SOUTH CHINA

This paper discusses the INAA results of REE in clays atand near some Permian/Triassic boundaries of South China.It showsthat the REE patterns of boundary clays differ from those of non-boundary clays.One difference is that the boundary clays are moreenriched in LREE,with steeper slope of REE and a smaller Eu nega-tive anomaly than the non-boundary clays.Another difference is that theboundary clays show a small Ce negative anomaly,but no Ce anomalyoccurs in the non-boundary clays.From these REE patterns and some other experimental facts,it isproposed that the P/T boundary clay may be a mixed product consistingof the acidic-intermediate ash and the upper crust substance representingsputtering component,and the calculated fraction of the former andlatter is 7/3.     

Longitudinal study of preadolescent sport self-concept and performance: reciprocal effects and causal ordering

Do preadolescent sport self-concepts influence subsequent sport performance? Longitudinal data (Grades 3, 4, and 6) for young boys and girls (N= 1,135; mean age = 9.67) were used to test reciprocal effects model (REM) predictions that sport self-concept is both a cause and a consequence of sport accomplishments. Controlling prior sport performance (performance-based measures and teacher assessments), prior sport self-concept had positive effects on subsequent sport performance in both Grade 4 and Grade 6 and for both boys and girls. Coupled with previous REM studies of adolescents in the academic domain, this first test for preadolescents in the sport domain supports the generalizability of REM predictions over gender, self-concept domain, preadolescent ages, and the transition from primary to secondary school.     

哲学的用处与哲学的灵魂

在当今时代,哲学成为一门备受冷落的学问。在哲学的课堂上,学生们最常问的一个问题就是:学哲学有什么用?本文结合哲学的产生原因,对于哲学这门特殊学科的"用处"问题进行了不同层面的探讨。说明了哲学作为一门"无用之学"所蕴涵的大用,即通过改变自身的视野来改变对环境的看法,从而在一种怀疑精神和批判意识的基础上不断地提升自身的智慧和教养。     

证券经纪人的浪漫故事

九点半时,证券经纪人哈维·马克斯韦尔在年轻女速记员的陪同下精神抖擞地走进办公室。机要秘书皮彻那通常毫无表情的脸上不禁露出一丝好奇和诧异。马克斯韦尔只随口道了声“早上好,皮彻”,便径直奔向办公桌．匆．虻得好像想一步跃过桌面,随后就一头扎进一大堆等着他处理的信件和电报里。     

一种稠油输送油溶性降粘剂的合成与优化

介绍了稠油在运输中遇到流动性差的问题,分析了胶质与沥青质的存在对高粘度的影响。选取甲基丙烯酸十八酯、苯乙烯、丙烯酰胺、马来酸酐为单体,利用溶液聚合法进行反应聚合。通过调节单体的配比,确定10∶2∶3∶0.5为最佳比例。再加入表面活性剂与溶剂进行复配,提高降粘效果。60℃下,将质量分数为5×10-4的降粘剂加入八面河稠油中降粘率能够达到50%。     

Kinetic comparison of a side-foot soccer kick between experienced and inexperienced players

The aim of this study was to identify critical kinetic variables that lead to increased ball velocity during a side-foot passing kick in soccer. Seven experienced male soccer players and eight inexperienced players participated in the experiment. They were instructed to perform side-foot kicks along the ground with maximum effort with an eye on the target line. The joint angles, angular velocities, and torques of the kicking leg were determined based on the three-dimensional kinematic data. The mean ball speed of the experienced group (21.4 +/- 1.5 m/s) was significantly faster than that of the inexperienced group (16.0 +/- 1.0m/s; P < 0.001). The motions of the inexperienced players tended to be less dynamic than those of the experienced players. The most noticeable difference in the kinetics of the kick was found in the hip flexion torque throughout the back-swing phase until the leg-cocking phase. The mean peak value of the experienced group (168 +/- 20 N x or m) was significantly greater than that of the inexperienced group (94 +/- 17 N x or m; P < 0.001). To increase ball speed during a side-foot passing kick, the generation of hip-flexion torque during the earlier stage of kicking is critical.     

Authoritarianism, perceived threat and exclusionism on the eve of the Disengagement: Evidence from Gaza

Major political events such as terrorist attacks and forced relocation of citizens may have an immediate effect on attitudes towards ethnic minorities associated with these events. The psychological process that leads to political exclusionism of minority groups was examined using a field study among Israeli settlers in Gaza days prior to the Disengagement Plan adopted by the Israeli government on June 6, 2004 and enacted in August 2005. Lending credence to integrated threat theory and to theory on authoritarianism, our analyses show that the positive effect of religiosity on political exclusionism results from the two-staged mediation of authoritarianism and perceived threat. We conclude that religiosity fosters authoritarianism, which in turn tends to move people towards exclusionism both directly and through the mediation of perceived threat.     

高校为区域经济发展服务大有可为

高等学校具有的功能和优势,决定了高校应该和能够为区域经济发展提供服务.本文从利用人才优势和科技优势两个方面,论述了高校为区域经济发展服务的可能性,探讨了高校为区域经济发展服务的途径和方法.     

日本實業補習教育近况

日本文部省職業教育局近嘗調查補習學校實施職業教練之成效。及其進展之程度。蓋日本改府發展其教育制度而致力於此點。已歷多年。而其制定職業教練之规程。亦且在一般西方国家討論此問題之前也。一八九○年。日本頒佈尋常小學校令。同時卽頒佈實業補習學校規程。越三年。又別頒一種規程。至一九○二年加以修正。但现在之制度     

歐洲高等以下農業教育概狀

波兰波蘭教育以南部西部为最发达·中等農業學校分佈於其各邨落者·約有四十所·各擁大宗農場·以为表演試驗之所·承郡政府之管轄·而受國庫之補助·入学年龄十二歲至十六岁·通常四年畢業·每校容學生自六十名以至一百名·波蘭小學課程·鄉邨與都市絕異·鄉邨小学以來學者之將來·类为農民·故教授趨重于农艺·一面在師範學较加入农业選科·俾鄉邨小學