Chemical milling solution produces smooth surface finish on aluminum

Elementary sulfur mixed into a solution of caustic soda and salts produces an etchant which will chemically mill end-grain surfaces on aluminum plate. This composition results in the least amount of thickness variation and pitting

Guitartia tridentata n. gen., n. sp (monhysterida: xyalidae) and macrodontium gaspari n. gen., n. sp (chromadorida: microlaimidae), free-living marine nematodes from the Caribbean sea

Two new genera of free-living marine nematodes are described from the muddy bottom of Cienfuegos Bay, Caribbean Sea. Guitartia n. gen. (Xyalidae, Monhysterida) is characterised by three long tooth-like structures in the stegostom, second and third circle of anterior sensilla separate and posterior genital branch of the female restricted to a long post-vulvar sac. The type species is Guitartia tridentata n. gen., n. sp. Within the Xyalidae, Guitartia n. gen. is morphologically close to Amphimonhystrella, Cobbia, Elzalia, Scaptrella and Valvaelaimus, all being characterised by sclerotised structures in the stoma and transverse striation of the body cuticle. Main features for discrimination are the type of stoma structure, the shape and relative size of amphidial fovea, the presence of a post-vulvar sac and gubernacular apophyses and the absence of terminal setae on the tail. Macrodontium n. gen. (Microlaimidae, Chromadorida) is characterised by a heavily sclerotised stoma with one large dorsal tooth and two smaller subventral teeth, sexual dimorphism in size and position of the amphidial fovea and males with a single anterior testis. The type species is Macrodontium gaspari n. gen., n. sp. Within the Microlaimidae, Macrodontium n. gen. is similar to the genera Acanthomicrolaimus and Bolbolaimus due to sclerotised stoma and presence of large dorsal tooth. The new genus is similar to Aponema in sexual dimorphism in the size of the amphidial fovea, monorchic males, presence of a gubernacular apophysis and conico-cylindrical tail shape. Morphological characters of diagnostic value within the family are the ornamentation of the body cuticle, relative length of cephalic sensilla, stoma sclerotisation and number of testes

Free-living marine nematodes from San Antonio Bay (Río Negro, Argentina)

The dataset of free-living marine nematodes of San Antonio Bay is based on sediment samples collected in February 2009 during doctoral theses funded by CONICET grants. A total of 36 samples has been taken at three locations in the San Antonio Bay, Santa Cruz Province, Argentina on the coastal littoral at three tidal levels. This presents a unique and important collection for benthic biodiversity assessment of Patagonian nematodes as this area remains one of the least known regions. In total 7,743 specimens of free-living marine nematodes belonging to two classes, eight orders, 37 families, 94 genera and 104 species were collected.Fil: Villares, Maria Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Lo Russo, Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Diversidad y Evolución Austral; ArgentinaFil: Pastor, Catalina Teresa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Diversidad y Evolución Austral; ArgentinaFil: Milano, Viviana. Universidad Nacional de la Patagonia; ArgentinaFil: Miyashiro, Lidia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Mazzanti, Renato. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentin

Electronic Security Systems in Academic Libraries: A Case Study of Three University Libraries in South-West Nigeria.

This study examines the effectiveness of electronic security systems in academic libraries with a focus on selected university libraries in South-West Nigeria. The study is to find out what electronic security systems are in use in academic libraries, how library materials are removed illegally, and to ascertain the effectiveness of the electronic devices in the libraries. A survey method was used for the study. Descriptive and inferential statistics of frequency counts and percentages were used to analyze data gathered through the survey. One hundred and nine (109) copies of the questionnaire were distributed. Eighty-one (81) copies (74%) were duly completed and retrieved from the respondents. A participant observation method was also employed to measure how effective the electronic security devices are. The study unveils that academic libraries have suffered adversely from security issues and other anti-social menaces and that the installation of electronic security devices would drastically curb the situation

Electronic Security Systems in Academic Libraries: A Case Study of Three University Systems in South-West Nigeria.

This study examines the effectiveness of electronic security systems in academic libraries with a focus on selected university libraries in South-West Nigeria. The study is to find out what electronic security systems are in use in academic libraries, how library materials are removed illegally, and to ascertain the effectiveness of the electronic devices in the libraries. A survey method was used for the study. Descriptive and inferential statistics of frequency counts and percentages were used to analyze data gathered through the survey. One hundred and nine (109) copies of the questionnaire were distributed. Eighty-one (81) copies (74%) were duly completed and retrieved from the respondents. A participant observation method was also employed to measure how effective the electronic security devices are. The study unveils that academic libraries have suffered adversely from security issues and other anti-social menaces and that the installation of electronic security devices would drastically curb the situation

Leaving Rurality Behind. Re-orientation of spatial policies in Sweden.

The paper will address the changing status of rural regions in policy formation in Sweden. Two basic processes are at work. First, decades of out-migration have given many rural regions a demographic structure, which is causing a self-propelling de-population. Secondly, the internationalisation of the economy and of politics has drawn the attention from the idea of nationwide welfare towards efforts to increase economic growth on a national basis. Regional policy is gradually shifting focus towards concepts and measures that are aiming at supporting dynamic growth regions. The new economic geography forms the basis for an "urbanised" regional policy: economies of scale, regional specialisation and the enlargement of labour market regions are key concepts in the spatial policies. Hence, the problems of marginalisation and decline in the periphery as well as the specific opportunities of vital rural areas are vanishing in politics and planning as the "rural development system" and the "rural dimension" is being phased-out from the conception of space.rural regions; regional policy

Editors\u27 Introduction

The idea of interpreting quantifiers in terms of a game between two players was first suggested at the end of the 19th century by one of the inventors of quantification theory, C. S. Peirce, but it laid buried in his papers until it was discovered in the 1980s. His idea was independently discovered in the 1950s, when Leon Henkin suggested a game semantics for infinitary languages. Paul Lorenzen introduced his Dialogspiele at the same time, while his student Kuno Lorenz introduced the vocabulary of game theory that led to our modern conception of game semantics shortly after. The idea is to provide an explanation of the meaning of the logical connectives and quantifiers in terms of rules for non-collaborative, zero-sum games between two agents, one of whom argues for the validity of the claim against moves from the other, and to define truth in terms of the existence of a winning strategy for the defender