Social vulnerability and participation in disaster recovery decisions: public housing in Galveston after Hurricane

In September 2008, Hurricane Ike caused massive damages to Galveston Island’s residential structures including four public housing developments. These developments were located in neighborhoods with some of the lowest incomes and highest percentages of people of color on the Island. Four months later, the Galveston Housing Authority (GHA) decided to demolish all four developments consisting of 569 housing units due to the damages to the buildings. Today, despite federal regulations requiring reconstruction, court orders mandating replacement of the demolished units, and available funding, only 142 low-income apartments have been rebuilt. We used the social vulnerability framework to understand these outcomes through the ability of groups to shape post-disaster recovery decisions. This paper argues that one of the overlooked characteristics of social vulnerability is a diminished ability to participate in post-disaster decision-making. We found that social vulnerability limited participation through three distinct mechanisms: the physical displacement of public housing residents, the stigmatization of public housing, and the reduction of residents to housing units in the debates. There were few local advocates arguing for the preservation of public housing units and even fewer remaining residents to speak up for themselves in the face of strong local resistance to the reconstruction of public housing units or the return of public housing residents. The void of a strong and authentic local pro-public housing perspective in Galveston provided an opening for various local campaigns to claim that their desired plan benefited the poor. The disaster recovery became an opportunity to remove or reduce public housing units and therefore public housing residents. Our findings show the dynamic features of vulnerability. While static factors of vulnerability can limit access to resources for recovery, dynamic processes of social marginalization and exclusion limit the voices of socially vulnerable groups in recovery decisions and exacerbate marginalization

Supramolecular Structure and Mechanical Properties of Wet-Spun Polyacrylonitrile/Carbon Nanotube Composite Fibers Influenced by Stretching Forces

The effect of different elongation conditions on the crystalline structure and physical and mechanical properties of polyacrylonitrile/carbon nanotube (PAN/CNT) microfibers during the wet spinning process was studied. It turns out that the response of polymer chains in PAN/CNT and in PAN fibers to the stretching forces from jet stretching and steam drawing is different. The X-ray diffraction (XRD) results showed that the crystalline domain size in steam-drawn PAN/CNT fibers is 1.5 times larger than in PAN fibers. CNTs alter the optimum stretching conditions, as they improve the crystalline structure of the PAN/CNT fibers at lower steam drawing ratios than PAN fibers, through nucleation of crystals on their surface. Synchrotron-radiation XRD studies revealed that the presence of CNTs improves the crystal orientation of PAN/CNT fibers significantly. In addition, steam drawing is more effective in improving the crystal orientation than jet stretching. The mechanical properties of PAN/CNT fibers have also been affected by steam drawing more than jet stretching. Multiwalled CNTs have the biggest impact on Young's modulus. The Young's modulus of PAN/CNT fibers could increase up to 19% higher than PAN fibers at specific stretching conditions, i.e., steam drawing ratio of 2.5. Better orientation of polymers and crystals in the fiber direction is the reason for the enhancement of Young's modulus. To our knowledge, the differences between the response of PAN/CNT and PAN fibers to stretching forces inside coagulation bath and after fiber coagulation as well as the difference in evolution of crystalline structure at different stretching stages has not been reported elsewhere

The Role of Collaborative Networks in Sustainability

http://www.springerlink.com/content/978-3-642-15960-2#section=791431&page=1International audienc

Cryopreservation of Ram Semen in Extenders Containing Soybean Lecithin as Cryoprotectant and Hyaluronic Acid as Antioxidant

P. 934-940A soybean lecithin‐based extender supplemented with hyaluronic acid (HA) was assayed for effectiveness to improve the quality of frozen–thawed ram semen. HA has not been tested yet in an extender containing soybean lecithin for freezing ram semen. Thus, the aim of this study was to analyse the effects of soybean lecithin at 1% or 1.5% along with HA at 0, 0.5 and 1 mg ml‐1 in a Tris‐based extender on the motion characteristics, membrane integrity (HOST), viability, GSH peroxidase (GSH‐PX) activity, lipid peroxidation and acrosomal status after freezing–thawing. Semen was collected from four Mehraban rams during the breeding season and frozen in the six lecithin×HA extenders. The extender containing 1.5% lecithin supplemented with no HA yielded higher total motility (52.5%±1.6), viability (55.8%±1.6) and membrane integrity (44.5%±1.7), but the effects of the lecithin concentration did not reach signification. Linearity‐related parameters, ALH, BCF, lipid peroxidation, GSH‐PX activity, morphology and acrosomal status were not affected by the extender composition. In general, adding HA significantly decreased sperm velocity (1 mg ml‐1 HA), total motility (only with 1.5% lecithin), viability (1 mg ml‐1 HA for 1% lecithin; both concentrations for 1.5% lecithin) and membrane integrity. In conclusion, adding HA to the freezing extender supplemented with soybean lecithin failed to improve quality‐related variables in ram semen. Increasing the lecithin content could have a positive effect, but further studies are needed.S

Solvent-free synthesis of xanthene derivatives by Preyssler type heteropolyacid

Dimedone reacted with aromatic aldehydes and 3,4-methylenedioxyphenol or β-naphthol in the presence of a catalytic amount of Preyssler type heteropolyacid, H14[NaP5W30O110], as a green and reusable catalyst under solvent-free conditions to form a variety of  new xanthene derivatives in very good  yields.KEY WORDS: Xanthene derivatives, Solvent-free synthesis, Preyssler type heteropolyacid, 3,4-Methylene dioxyphenol, β-Naphthol, Three-component one-pot reactions Bull. Chem. Soc. Ethiop. 2011, 25(3), 399-406

A Service Integration Platform for Collaborative Networks

Integrated manufacturing constitutes a complex system made of heterogeneous information and control subsystems. Those subsystems are not designed to the cooperation. Typically each subsystem automates specific processes, and establishes closed application domains, therefore it is very difficult to integrate it with other subsystems in order to respond to the needed process dynamics. Furthermore, to cope with ever growing marketcompetition and demands, it is necessary for manufacturing/enterprise systems to increase their responsiveness based on up-to-date knowledge and in-time data gathered from the diverse information and control systems. These have created new challenges for manufacturing sector, and even bigger challenges for collaborative manufacturing. The growing complexity of the information and communication technologies when coping with innovative business services based on collaborative contributions from multiple stakeholders, requires novel and multidisciplinary approaches. Service orientation is a strategic approach to deal with such complexity, and various stakeholders' information systems. Services or more precisely the autonomous computational agents implementing the services, provide an architectural pattern able to cope with the needs of integrated and distributed collaborative solutions. This paper proposes a service-oriented framework, aiming to support a virtual organizations breeding environment that is the basis for establishing short or long term goal-oriented virtual organizations. The notion of integrated business services, where customers receive some value developed through the contribution from a network of companies is a key element

The effectiveness of social group work remedial model with reality therapy approach on social adjustment of people improved from addiction

The current research aimed to study the effectiveness of social group work remedial model with reality therapy approach on social adjustment of people improved from addiction.The study to quasi-experimental method with pre-test and post-test design on two groups (control and intervention) with one-month follow-up. The statistical population of the study all participants in the self-help group Rahpooyan Rahaei Tehran Branch after the initial leave of abuse. Everyone were assessed in term of social adjustment. Then, 30 people whose social adjustment score was lower than other people in this group and had the criteria to be studied, were randomly divided into two equal groups of control (n = 15) and experimental (n = 15). The experimental group was education in 8 sessions of reality therapy intervention according to the remedial model of social group work. During this period, the control group did not receive any intervention. After completing all sessions and complete training, post-test (Wiseman and Pickel social adjustment questionnaire) was performed on two groups. Descriptive and inferential statistics (analysis of covariance) were used to analyze the data.The results showed that there was a significant difference between intervention and control groups regarding the social adjustment and its dimensions. The scores were increased in intervention group after intervention and in follow-up.In conclusion, social group work remedial model with reality therapy approach has a significant positive effect on social adjustment of improved from addiction.Keywords: social adjustment, improved from addiction, reality therapy approach, social group work remedial mode

Different concentrations of cysteamine and ergothioneine improve microscopic and oxidative parameters in ram semen frozen with a soybean lecithin extender

P. 68-73The aim of this study was to evaluate the effects of ergothioneine and cysteamine as antioxidant supplements in a soybean lecithin extender for freezing ram semen. Twenty-four ejaculates were collected from four rams and diluted with extenders (1.5% soybean lecithin, 7% glycerol) containing no supplements (control) and cysteamine or ergothioneine (2, 4, 6 or 8 mM). Motility by CASA, viability, plasma membrane functionality (HOS test), total abnormality, lipid peroxidation, glutathione peroxidase (GPx) activity and capacitation status (CTC staining) were assessed after thawing. Using 6 mM of either antioxidant improved total motility. Cysteamine at 6 mM and ergothioneine at 4 and 6 mM improved viability and reduced lipid peroxidation (malondialdehyde concentration). Both antioxidants improved membrane functionality significantly, except at 8 mM. Progressive motility, kinematic parameters, GPx activity, capacitation status and sperm abnormalities were not influenced by the antioxidant supplements. In conclusion, cysteamine at 6 mM and ergothioneine at 4 or 6 mM seem to improve the post-thawing quality of ram semen cryopreserved in a soybean lecithin extender.S