A Study of University Students' Understanding of Simple Electric Circuits Part 1: Current in d.c. Circuits

RIASSUNTO

A written questionnaire was submitted to two samples of sophomore students mainly from the Faculty of Engineering at Ban University (Southern Italy). The eight problems proposed in the questionnaire concerned the functioning of simple d.c. circuits. Analysis of the results shows the presence of a common misunderstanding (sequential reasoning) based on a ‘local’ interpretation of the current flow (i.e. the current value at a given position is not influenced by the passive elements not yet ‘encountered’ by the current). This form of reasoning has been found to be very tenacious since it is still largely shared after teaching on circuitry at university level and is present even in students who have passed the physics examination at university. The implications of these results are considered

RISSUNTO A due campioni di studenti appartenenti soprattutto al secondo e terzo anno delta Facoltá di Ingegneria dell’Universitá di Bari é stato proposto un questionario (8 problemi) sul funzionamento di semplici circuiti elettrici. L'analisi dei risultaii ha evidenziato I'esistenza di un errore comune (ragionamento sequenziale) consistent in una interpretazione ‘locale‘ delflusso di corrente: la corrente in un punto del circuito non e influenzata dagli elementi passivi, se da essa non ancora ‘attraversati’. Si é riscontrato eke tale forma di ragionamento é largamente presente anche dopo I'insegnamento della circuitistica a livello universitario e in studenti che hanno superato l'esame di fisica. Vengono, quindi, discusse le implicazioni derivanti da tali risultati.     

高师院校“现代教育技术”课程改革的探讨

针对目前高等师范教育中“现代教育技术”公共课的现状进行调查分析，指出了存在的一些不足之处，并提出了“现代教育技术”课程改革的一些建议．     

TAXONOMY OF VOCATIONAL INTERESTS OF ACADEMIC MAJOR AREAS

This study appraised the degree to which student profiles on the Jackson Vocational Interest Survey (JVIS) for different academic majors could be clustered in a meaningful way. From an initial sample of 10,134 students, a matrix of mean scores for 131 academic majors on each of 34 JVIS basic interest scales was computed. This matrix was subjected to a singular value decomposition with subsequent orthogonal and oblique rotations of 17 reference axes. The 17 clusters so defined reflected distinct sets of academic major fields, with separate clusters for majors in engineering, computer science, performing arts, communicative arts, human services, and others. Male and female groups entered into the definition of every cluster. Based on the salient representations of academic majors on these reference axes, modal cluster profiles were computed and decomposed into five orthogonal higher-order dimensions. The implications of these findings for the psychology of occupational choice, career development, and vocational interest measurement are outlined.     

庄子和尼采的超越哲学观

作为叛逆哲人,庄子和尼采哲学都是超越哲学,出于对生命之热爱,他们对传统思想观念作了深刻的反省与批判并致力于转换。对两人的本体论、认识论、人生观进行比较,发现尼采提倡昂然的生命力和奋发的意志力与庄子的无争、顺应自然以提高精神境界大异其趣,但他们在各自超越思想中所倡导的个性独立之精神无疑为时代发展带来了强烈的心灵震撼,体现出一种人本主义精神。     

浅议青海社区自治中的居民参与问题

目前,社区自治已经在我省广泛实施,但是,居民对于社区事务参与不足始终是困扰社区自治进一步发展的重要制约因素。本文在对西宁市的社区进行调研的基础上,分析了目前居民参与社区事务的现状,并且从参与式治理的角度提出了解决之策。     

消失的垃圾话

"在季后赛里,谁更能说垃圾话,谁就更能赢球,"球员X说。"当然,那个叫KG的家伙除外。"球员X是NBA的匿名球星,文章取自他的专栏。这两年的季后赛,已经很少再出现能够流行的垃圾话了,至于那些摄魂幽默、绕梁三日的辛辣争辩,更是想都别想。是     

七年之痒杰 拉德·华莱士

现实总是充满荆棘和残酷,NBA就是一个江湖,在这里湿了鞋的每一个成员,从第一天起就做好了遭遇种种突发事件的准备,包括最有可能出现的背叛。杰拉德·华莱士为山猫效力了七年,正应了中国那句老话"七年之痒",于是,曾经的"猫王"也遭遇了背叛。