Matching of spatially homogeneous non-stationary space--times to vacuum in cylindrical symmetry

We study the matching of LRS spatially homogeneous collapsing dust space-times with non-stationary vacuum exteriors in cylindrical symmetry. Given an interior with diagonal metric we prove existence and uniqueness results for the exterior. The matched solutions contain trapped surfaces, singularities and Cauchy horizons. The solutions cannot be asymptotically flat and we present evidence that they are singular on the Cauchy horizons.Comment: LaTeX, 15 pages, 1 figure, submitted for publicatio

Influencia de pre tratamientos convencionales en el proceso de secado de banano y en las características físicas del producto final

This objective was to evaluate the effects of pre-drying treatments such as osmotic dehydration, antioxidants, and blanching using banana. A dry samples with different pre-treatments were performed to obtain the isotherms of the monolayer, which has a direct relationship with the shelf life. Once drying processes, it was determined the rate of drying where the product has the highest rate of drying is that which was not subjected to any pre-treatment, which is related to life. Subsequently, in addition to the experiment, we determined the shelf life, using the method of Theodore Labuza, proving the relationship and the value of the monolayers of the isotherms and the values of drying rate, which the sample without pre-treatment showed the highest value. Finally, we statistically analyzed the results, with a design of experiments, comparing the response variables with a significance level of 95%

Transverse flow in relativistic viscous hydrodynamics

Hydrodynamic model simulations of Au-Au collisions at RHIC have indicated recently, that with improved simulations in the coming years, it may be feasible to quantify the viscosity of the matter produced in heavy ion collisions. To this end, a consistent fluid dynamic description of viscous effects is clearly needed. In this note, we observe that a recently used, approximate form of the 2nd order Israel-Stewart viscous hydrodynamic equations of motion cannot account consistently for the transverse flow fields, which are expected to develop in heavy ion collisions. We identify the appropriate equations of motion.Comment: 5 pages, uses REVTEX

Crime Management Strategies and Residents’ Safety Survey in Developing Countries: The Case of Oshogbo, Nigeria

This study examined crime management strategies and residents’ feeling of safety in developing countries using Oshogbo, Nigeria. The survey was conducted through interview of 202 systematically selected residents of the town and their responses were subjected to descriptive analysis and correlation. Four (4) crime prevention and management approaches identified in the study area were strategies to improve safety and security, increasing social development, community-government interaction and environmental development. Social development was considered as the most effective crime management strategy in Osogbo(27.5%.) while the least considered in term of effectiveness was safety and security measures (20.8%). Residents’ perception of safety measured through an index of 5 and tagged safety perception index(PSI) revealed that  the overall safety index for Osogbo  during the day (SPIday ) was put at 4.43 while that of night time (SPInight ) was 4.25. PSI at home was put at 4.57 during the day and 4.45 (SD= 0.20) in the night. The PSI for work place during the day and in the night were 4.41 and 4.23 while that of public places were 4.30 and 4.08 respectively. Safety and Security measures had a strong positive correlation with safety at home (r= 0.743) and safety in public places (r=0.709). The correlation between social development and feeling of safety at home was 0.833 while that of public places and work places were 0.821 and 0.789 respectively. The correlation coefficient (r) between crime prevention through environmental design(CPTED) and residents feeling of safety at home was 0.935 while that of public places was 0.878. The study concluded significant relationship existed between residents’ feeling of safety and crime management and prevention strategies observed and that residents of Osogbo have a good feeling of safety at home, work place and in public places. Keywords: Crime, Victimization, Management, Prevention, Safet

W290-B Diagnosing Suspected Off-Target Herbicide Damage to Tobacco

Herbicide Stewardship Publicatio

Usage of Solar Inverter Technology as Alternative Energy Source: A Catalyst for Round the Clock Electronic Services in Nigerian University Libraries

This study examines usage of solar-inverter technology as alternative energy source: a catalyst for round the clock electronic services in Nigerian university libraries. The total population for this study comprised three hundred and seventy one (371) librarians from 40 university libraries in South West, Nigeria. The data collected were analyzed using simple percentage/frequency counts and weighted mean. Findings from this study revealed among others that the extent of librarians’ awareness of solar- inverter technology as alternative sources of energy in university libraries in South West, Nigeria is very high; electronic reference service, online interlibrary loan service, online cataloguing and classification service, OPAC service, online current awareness service, electronic indexing and abstracting service, online selective dissemination of information service, e-mail service, electronic charging and discharging service among others are types of electronic services that can be provided round the clock in university libraries in South West, Nigerian using solar-inverter energy as alternative energy source and that the extent to which solar-inverter energy can be used as alternative energy source to power ICT equipments for electronic services in university libraries in South West, Nigeria is high among other findings. Recommendations made based on the findings of the study include: University library management should make it a point of duty and also take it as priority to allocate fund for the acquisition and installation of solar-inverter technology as this will help them fulfil the library goal of rendering round the clock electronic library services to their users among others

Microfluidic Breadboard Approach to Capillary Electrophoresis

A breadboard approach for electrophoretic separations with contactless conductivity detection is presented. This is based on miniature off-the-shelf components such as syringe pumps, valves, and pressure controllers which could be set up in a very compact overall arrangement. It has a high flexibility for different tasks at hand, and the common operations of hydrodynamic injection and capillary flushing are automated. For demonstration of the versatility of the proposition, several very diverse configurations and modes of electrophoresis were successfully implemented, namely, standard capillary zone electrophoresis, pressure assisted zone electrophoresis, the simultaneous separation of cations and anions by dual-capillary zone electrophoresis, the separation of cationic amino acids by isotachophoresis, as well as the separation of small carboxylic acids by gradient elution moving boundary electrophoresis. The system also allows fast separations, as demonstrated by the analysis of six inorganic cations within 35 s. The approach addresses respective limitations of either conventional capillary electrophoresis instruments as well as electrophoretic lab-on-chip devices, while maintaining a performance in terms of detection limits and reproducibility comparable to standard instrumentation

Achieving sustainability in the construction supply chain

Sustainable construction and supply chain management (SCM) have, in recent years, become two of the most important performance-related issues within the construction industry. To achieve corporate sustainability within any organisation, it is essential that sustainability issues are addressed throughout the organisation's whole supply chain, a process referred to as sustainable supply chain management (SSCM). The implementation of SCM and sustainability is, however, an extremely complex undertaking. Through an extensive literature review and detailed interviews, this research has identified the conditions and strategies for achieving SSCM within construction organisations. The research also investigated the meaning, barriers and enablers, issues, tools and techniques for achieving successful SCM and SSCM. The study was based on the perspectives of senior managers of exemplar organisations with a proven track record in sustainability and SCM. It has been possible to identify best practice from which other organisations can learn, thus supporting the industry in the move towards more sustainable construction practices