La vida a la frontera. El limes britannicus

Treballs Finals de Grau en Història, Facultat de Geografia i Història, Universitat de Barcelona, Curs: 2013-2014, Tutor: Maria Dolors Molas FontLa investigació arqueològica de les fortaleses i els assentaments civils localitzats al llarg de la frontera, tan a un costat com a l’altre del mur, permet formular noves hipòtesis d’estudi sobre la situació fronterera al nord de Britania. Cada dia es produeixen nous descobriments que permeten una nova perspectiva sobre la vida a la frontera, especialment en els aspectes més desconeguts o més difícils de conèixer, l’àmbit quotidià i la relació amb els nadius del nord del mur

Aula d'Ecologia : cicle de conferències 2006 /

Descripció del recurs: 13 juny 200

Aula d'Ecologia : cicle de conferències 2005

Descripció del recurs: 13 juny 200

What makes re-finding information difficult? A study of email re-finding

Re-nding information that has been seen or accessed before is a task which can be relatively straight-forward, but often it can be extremely challenging, time-consuming and frustrating. Little is known, however, about what makes one re-finding task harder or easier than another. We performed a user study to learn about the contextual factors that influence users' perception of task diculty in the context of re-finding email messages. 21 participants were issued re-nding tasks to perform on their own personal collections. The participants' responses to questions about the tasks combined with demographic data and collection statistics for the experimental population provide a rich basis to investigate the variables that can influence the perception of diculty. A logistic regression model was developed to examine the relationships be- tween variables and determine whether any factors were associated with perceived task diculty. The model reveals strong relationships between diculty and the time lapsed since a message was read, remembering when the sought-after email was sent, remembering other recipients of the email, the experience of the user and the user's ling strategy. We discuss what these findings mean for the design of re-nding interfaces and future re-finding research

Coupled dynamic modeling of scrap melting and gas phase reactions in the electric arc furnace process

Abstract Gas phase reactions have a significant effect on the composition and heat content of the off-gas in the electric arc furnace (EAF) process. In this work, a previously developed dynamic scrap melting and heat transfer model was coupled with a gas phase reaction module based on Gibbs energy minimization. The gas phase reaction module retrieves the necessary thermodynamic data from a previously developed thermochemistry module. The gas phase reaction module has been used to improve the description of the gas burners and the freeboard of the EAF. The implementation of the gas phase reaction module has been found to be in good agreement with commercially available software (HSC Sim) for calculations assuming a gas phase equilibrium.Abstract Gas phase reactions have a significant effect on the composition and heat content of the off-gas in the electric arc furnace (EAF) process. In this work, a previously developed dynamic scrap melting and heat transfer model was coupled with a gas phase reaction module based on Gibbs energy minimization. The gas phase reaction module retrieves the necessary thermodynamic data from a previously developed thermochemistry module. The gas phase reaction module has been used to improve the description of the gas burners and the freeboard of the EAF. The implementation of the gas phase reaction module has been found to be in good agreement with commercially available software (HSC Sim) for calculations assuming a gas phase equilibrium

Ciri dan Tugas Perkembangan Pada Masa Remaja Awal dan Menengah Serta Pengaruhnya Terhadap Pendidikan

Masa remaja merupakan periode dimana terjadi perubahan besar pada diri seorang manusia baik itu secara fisik ataupun psikis. Seseorang dikatakan berhasil melewati masa remajanya apabila ia mampu melaksanakan tugas-tugas perkembangan di masa remaja, salah satu tugas yang penting yaitu menerima keadaan fisik dan psikis dirinya dan mampu untuk mengontrol serta membawa dirinya kepada hal-hal yang bermanfaat, baik itu untuk dirinya sendiri ataupun orang lain. Tanpa disadari oleh banyak orang, tugas perkembangan yang dibutuhkan oleh seorang remaja mengacu pada tugas perkembangan yang berhubungan dengan kemampuan menerima keadaan fisik, sehingga perkembangan untuk mencapai penerimaan keadaan fisik atau citra tubuh menjadi salah satu hal yang penting dalam memenuhi tugas perkembangannya. Seorang guru juga harus bisa melatih siswanya untuk bisa bertanggung jawab,baik itu kepada dirinya sendiri,tuas pribadinya,dan juga tanggung jawab kepada orang lain

REPRODUCTIVE BIOLOGY OF THE RED BIGEYE (Priacanthus macracanthus Cuvier, 1829) IN PALABUHANRATU BAY, INDONESIA

The reference point of reproductive biology play an important roles in developing a baseline information for fishery management. Different waters will provide different overview of fisheries related to its biological aspects. The red bigeye (Priacanthus macracanthus) is one of economically important demersal fish species in Indonesia. To support the biological status of this species, a regular field observation were carried out during May 2016 to April 2017 in Palabuhanratu bay, south of West Java. The objective of this study is to estimate the spawning season and potential reproductive stages including to evaluate how the key management related to the species and its gear selectivity. Numbers of red bigeye (Priacanthus macracanthus) specimen was collected from bottom gillnetter and hand liner. Basic information related to length-weigth, bio-reproduction (maturity) were collected regularly to determine GSI, Fecundity and its impact of fishing (Lc, Lm) to evaluate the recent stock status. The result showed sex ratio no significant differences between males and females except in September to December. The growth pattern indicated negative allometric. The predicted of spawning seasons were around June-July and December-January. Mean of fecundity was estimated to be 230,000 ± 178,000 eggs. Management keys were obtained i.e. length at first maturity (Lm) value was to be 21.9 cm TL which is smaller than length at first capture (Lc) 22.4 cm TL for bottom gill netter and 23.1 cm TL for average fishes caught by hand liner. Therefore it is recommended to close the waters in the bay area during the spawning period. In the case of catch, it is important to apply the precautionary approach with emphasizes to the size of fish allowed to be captured more than the Lm value (above 21.9 cm TL).