The modified 2VO ischemia protocol causes cognitive impairment similar to that induced by the standard method, but with a better survival rate

Permanent bilateral occlusion of the common carotid arteries (2VO) in the rat has been established as a valid experimental model to investigate the effects of chronic cerebral hypoperfusion on cognitive function and neurodegenerative processes. Our aim was to compare the cognitive and morphological outcomes following the standard 2VO procedure, in which there is concomitant artery ligation, with those of a modified protocol, with a 1-week interval between artery occlusions to avoid an abrupt reduction of cerebral blood flow, as assessed by animal performance in the water maze and damage extension to the hippocampus and striatum. Male Wistar rats (N = 47) aged 3 months were subjected to chronic hypoperfusion by permanent bilateral ligation of the common carotid arteries using either the standard or the modified protocol, with the right carotid being the first to be occluded. Three months after the surgical procedure, rat performance in the water maze was assessed to investigate long-term effects on spatial learning and memory and their brains were processed in order to estimate hippocampal volume and striatal area. Both groups of hypoperfused rats showed deficits in reference (F(8,172) = 7.0951, P < 0.00001) and working spatial memory [2nd (F(2,44) = 7.6884, P < 0.001), 3rd (F(2,44) = 21.481, P < 0.00001) and 4th trials (F(2,44) = 28.620, P < 0.0001)]; however, no evidence of tissue atrophy was found in the brain structures studied. Despite similar behavioral and morphological outcomes, the rats submitted to the modified protocol showed a significant increase in survival rate, during the 3 months of the experiment (P < 0.02).

Influence of population and exercise protocol characteristics on hemodynamic determinants of post-aerobic exercise hypotension

Due to differences in study populations and protocols, the hemodynamic determinants of post-aerobic exercise hypotension (PAEH) are controversial. This review analyzed the factors that might influence PAEH hemodynamic determinants, through a search on PubMed using the following key words: “postexercise” or “post-exercise” combined with “hypotension”, “blood pressure”, “cardiac output”, and “peripheral vascular resistance”, and “aerobic exercise” combined only with “blood pressure”. Forty-seven studies were selected, and the following characteristics were analyzed: age, gender, training status, body mass index status, blood pressure status, exercise intensity, duration and mode (continuous or interval), time of day, and recovery position. Data analysis showed that 1) most postexercise hypotension cases are due to a reduction in systemic vascular resistance; 2) age, body mass index, and blood pressure status influence postexercise hemodynamics, favoring cardiac output decrease in elderly, overweight, and hypertensive subjects; 3) gender and training status do not have an isolated influence; 4) exercise duration, intensity, and mode also do not affect postexercise hemodynamics; 5) time of day might have an influence, but more data are needed; and 6) recovery in the supine position facilitates systemic vascular resistance decrease. In conclusion, many factors may influence postexercise hypotension hemodynamics, and future studies should directly address these specific influences because different combinations may explain the observed variability in postexercise hemodynamic studies.

Optimization of random amplified polymorphic DNA protocol for molecular identification of Lophius gastrophysus

Lophius gastrophysus has important commercial value in Brazil particularly for foreign trade. In this study, we described the optimization of Random Amplified Polymorphic DNA (RAPD) protocol for identification of L. gastrophysus. Different conditions (annealing temperatures, MgCl concentrations, DNA quantity) were tested to find reproducible and adequate profiles. Amplifications performed with primers A01, ² A02 and A03 generate the best RAPD profiles when the conditions were annealing temperature of 36ºC, 25 ng of DNA quantity and 2.5 mM MgCl2. Exact identification of the species and origin of marine products is necessary and RAPD could be used as an accurate, rapid tool to expose commercial fraud.

Formal modelling for digital media distribution

Human beings have always strived to preserve their memories and spread their ideas. In the beginning this was always done through human interpretations, such as telling stories and creating sculptures. Later, technological progress made it possible to create a recording of a phenomenon; first as an analogue recording onto a physical object, and later digitally, as a sequence of bits to be interpreted by a computer. By the end of the 20th century technological advances had made it feasible to distribute media content over a computer network instead of on physical objects, thus enabling the concept of digital media distribution. Many digital media distribution systems already exist, and their continued, and in many cases increasing, usage is an indicator for the high interest in their future enhancements and enriching. By looking at these digital media distribution systems, we have identified three main areas of possible improvement: network structure and coordination, transport of content over the network, and the encoding used for the content. In this thesis, our aim is to show that improvements in performance, efficiency and availability can be done in conjunction with improvements in software quality and reliability through the use of formal methods: mathematical approaches to reasoning about software so that we can prove its correctness, together with the desirable properties. We envision a complete media distribution system based on a distributed architecture, such as peer-to-peer networking, in which different parts of the system have been formally modelled and verified. Starting with the network itself, we show how it can be formally constructed and modularised in the Event-B formalism, such that we can separate the modelling of one node from the modelling of the network itself. We also show how the piece selection algorithm in the BitTorrent peer-to-peer transfer protocol can be adapted for on-demand media streaming, and how this can be modelled in Event-B. Furthermore, we show how modelling one peer in Event-B can give results similar to simulating an entire network of peers. Going further, we introduce a formal specification language for content transfer algorithms, and show that having such a language can make these algorithms easier to understand. We also show how generating Event-B code from this language can result in less complexity compared to creating the models from written specifications. We also consider the decoding part of a media distribution system by showing how video decoding can be done in parallel. This is based on formally defined dependencies between frames and blocks in a video sequence; we have shown that also this step can be performed in a way that is mathematically proven correct. Our modelling and proving in this thesis is, in its majority, tool-based. This provides a demonstration of the advance of formal methods as well as their increased reliability, and thus, advocates for their more wide-spread usage in the future.

Yhteistyön ongelmat kahden oppilaitoksen välillä – Case: Kotka Maritime Centre

Tämän tutkimuksen tarkoituksena oli selvittää kahden oppilaitoksen, Kymenlaakson ammattikorkeakoulun ja Etelä-Kymenlaakson ammattiopiston merenkulkualan koulutusten, välisiä yhteistyöongelmia. Tutkimus rajattiin koskemaan täydennyskoulutus- ja simulaattorikeskusyhteistyön ongelmia. Yhteistyössä oli todettu olevan ongelmia, ja tutkimuksella selvitettiin ongelmat ja luotiin toimenpide-ehdotuksia ongelmien ratkaisemiseksi. Tutkimus toteutettiin puolistrukturoiduin haastatteluin, johon haastateltiin yhteensä 22 henkilöä molemmista oppilaitoksista. Tutkimuksen runko luotiin teoreettisen viitekehyksen mukaisesti organisaatioiden välisen yhteistyön elementeistä. Haastattelujen analysoinnissa käytettiin sisällönanalyysiä. Tutkimuksen perusteella löydettiin useita ongelmia yhteistyössä. Kolme keskeisintä ongelmaa olivat henkilösuhteissa esiintynyt luottamuspula ja henkilökemiat, johtamisen puute sekä roolien ja työtehtävien epäselvyys. Työtä ongelmien korjaamiseksi tulee olemaan, mutta ne ovat ratkaistavissa luomalla tarkemmat suuntaviivat yhteistyölle ja lisäämällä vuorovaikutusta kokoontumisten avulla. Molemmilla oppilaitoksilla oli tulevaisuuteen tähtäävä näkemys yhteistyön lisäämisestä ja kehittämisestä.

Berlin, colonel Reinhard au centre, auteur de la phrase Jewish flag for the new German colours [il a comparé le nouveau drapeau allemand à un torchon juif] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 58631

Liste officielle ... des prisonniers de guerre français : d'après les renseignements fournis par l'autorité militaire allemande : nom, date et lieu de naissance, unité / Centre national d'information sur les prisonniers de guerre

1941/05/31 (N98).

Liste officielle ... des prisonniers de guerre français : d'après les renseignements fournis par l'autorité militaire allemande : nom, date et lieu de naissance, unité / Centre national d'information sur les prisonniers de guerre

1941/01/13 (N63).

Liste officielle ... des prisonniers de guerre français : d'après les renseignements fournis par l'autorité militaire allemande : nom, date et lieu de naissance, unité / Centre national d'information sur les prisonniers de guerre

1940/10/10 (N29).

Liste officielle ... des prisonniers de guerre français : d'après les renseignements fournis par l'autorité militaire allemande : nom, date et lieu de naissance, unité / Centre national d'information sur les prisonniers de guerre

1941/01/04 (N60).

Liste officielle ... des prisonniers de guerre français : d'après les renseignements fournis par l'autorité militaire allemande : nom, date et lieu de naissance, unité / Centre national d'information sur les prisonniers de guerre

1941/06/10 (N99).

Liste officielle ... des prisonniers de guerre français : d'après les renseignements fournis par l'autorité militaire allemande : nom, date et lieu de naissance, unité / Centre national d'information sur les prisonniers de guerre

1940/12/28 (N58).

Liste officielle ... des prisonniers de guerre français : d'après les renseignements fournis par l'autorité militaire allemande : nom, date et lieu de naissance, unité / Centre national d'information sur les prisonniers de guerre

1940/09/27 (N22).

Liste officielle ... des prisonniers de guerre français : d'après les renseignements fournis par l'autorité militaire allemande : nom, date et lieu de naissance, unité / Centre national d'information sur les prisonniers de guerre

1940/12/16 (N53).

Liste officielle ... des prisonniers de guerre français : d'après les renseignements fournis par l'autorité militaire allemande : nom, date et lieu de naissance, unité / Centre national d'information sur les prisonniers de guerre

1940/12/07 (N49).