Development of a bycatch reduction device (BRD) for shrimp beam trawl using flexible materials

This study aimed to design a bycatch reduction device (BRD) for shrimp beam trawl, which is manufactured by flexible materials to reduce bycatch for the gear in the South Sea of Korea. The model test was carried out to understand the shape of the gear in the water and to measure the variation of flow speed due to the BRD in a circulating water channel. Catches were compared between a shrimp beam trawl without BRD (control gear) and others with BRD (treatment gears) in the field. BRDs were two different types in this study. In the case of BRD (a), a square-shaped grid net and a funnel-shaped net were installed in the front part of the cod end to help fish sorting and expelling through the outlet at the bottom. BRD (b) has one more outlet which is added at the upper part of the BRD (a). On the model test, water speed was reduced a little in the gear by installing the BRD. At the results of comparing with a control gear, the bycatch (%) of fish excluding shrimp was reduced between 17 and 68% using BRD (a) and 5 and 66% for BRD (b) respectively. By the signed test of significant level 0.05, the quantity of shrimp catches for BRD (a) was not different in comparison to the control gear but it decreased for the gear installing BRD (b)

Semi-invariants of symmetric quivers of finite type

Let $(Q,\sigma)$ be a symmetric quiver, where $Q=(Q_0,Q_1)$ is a finite quiver without oriented cycles and $\sigma$ is a contravariant involution on $Q_0\sqcup Q_1$. The involution allows us to define a nondegenerate bilinear form on a representation $V$ of $Q$. We shall call the representation orthogonal if is symmetric and symplectic if $$ is skew-symmetric. Moreover we can define an action of products of classical groups on the space of orthogonal representations and on the space of symplectic representations. For symmetric quivers of finite type, we prove that the rings of semi-invariants for this action are spanned by the semi-invariants of determinantal type $c^V$ and, in the case when matrix defining $c^V$ is skew-symmetric, by the Pfaffians $pf^V$

Percutaneous placement of self-expandable metallic stents in patients with obstructive jaundice secondary to metastatic gastric cancer after gastrectomy

OBJECTIVE: To evaluate the outcomes of patients undergoing percutaneous placements of a biliary stent for obstructive jaundice secondary to metastatic gastric cancer after gastrectomy. MATERIALS AND METHODS: Fifty patients (mean age, 62.4 years; range, 27-86 years) who underwent percutaneous placements of a biliary stent for obstructive jaundice secondary to metastatic gastric cancer after gastrectomy were included. The technical success rate, clinical success rate, complication rate, stent patency, patient survival and factors associated with stent patency were being evaluated. RESULTS: The median interval between the gastrectomy and stent placement was 23.1 months (range, 3.9-94.6 months). The 50 patients received a total of 65 stents without any major procedure-related complications. Technical success was achieved in all patients. The mean total serum bilirubin level, which had been 7.19 mg/dL ± 6.8 before stent insertion, decreased to 4.58 mg/dL ± 5.4 during the first week of follow-up (p < 0.001). Clinical success was achieved in 42 patients (84%). Percutaneous transhepatic biliary drainage catheters were removed from 45 patients (90%). Infectious complications were noted in two patients (4%), and stent malfunction occurred in seven patients (14%). The median stent patency was 233 ± 99 days, and the median patient survival was 179 ± 83 days. Total serum bilirubin level after stenting was an independent factor for stent patency (p = 0.009). CONCLUSION: Percutaneous transhepatic placement of a biliary stent for obstructive jaundice secondary to metastatic gastric cancer after gastrectomy is a technically feasible and clinically effective palliative procedure

Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at √ s = 8 TeV with the ATLAS detector

Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses 20.3 fb−1 of √ s = 8 TeV data collected in 2012 with the ATLAS detector at the LHC. Events are required to have at least one jet with pT > 120 GeV and no leptons. Nine signal regions are considered with increasing missing transverse momentum requirements between Emiss T > 150 GeV and Emiss T > 700 GeV. Good agreement is observed between the number of events in data and Standard Model expectations. The results are translated into exclusion limits on models with either large extra spatial dimensions, pair production of weakly interacting dark matter candidates, or production of very light gravitinos in a gauge-mediated supersymmetric model. In addition, limits on the production of an invisibly decaying Higgs-like boson leading to similar topologies in the final state are presente

A Clinical Study on Anti-wrinkle Efficacy of a Cosmetics Containing Oligoarginine Conjugation of Palmitoyl-GHK peptide for Skin Penetrating

In this study, Arg 4 (R4) was conjugated with Pal-GHK to get palmitoyl heptapeptide, Pal-GHK‐R4 and wrinkle improvement clinical trials of cosmetics containing Pal-GHK‐R4 were conducted. As a result of total 21 subjects used the test products 4 weeks use on the face area; 1) measurement results of crow’s feet after 2 and 4 weeks of test products use, analysis value of crow’s feet statistically significantly decreased after 2 and 4 weeks of test products use compared to before use of products (p&lt;0.05); 2) measurement results of skin moisturization after 2 and 4 weeks test products use, measured value of skin moisture content statistically significantly increased after 2 and 4 weeks use compared to before use of products (p&lt;0.05); 3) measurement results of TEWL after 2 and 4 weeks use, measured value of TEWL statistically significantly decreased after 2 and 4 weeks use compared to before use of product(p&lt;0.05); 4) there was no skin adverse event reported after using the products during the study period. Therefore, the test products containing both wrinkle improving and skin penetrating peptides, Pal-GHK‐R4 are considered to have beneficial effects on improvement of skin wrinkle, moisturization, transepidermal water loss(TEWL) after 2 and 4 weeks use of test product

Emerging school sport development policy, practice and governance in England: Big Society, autonomy and decentralisation

International interest in developing mass sports participation through systems of school and community sports development has become a growing field of public leisure policy interest. This research paper considers the policy change from School Sport Partnerships to the new 2012 School Games model of networked partnerships to establish characteristics of the changes in governance modes and implications from practice in England. The research project is based on a regional case study drawing upon indepth,face-to-face interviews with key public policy stakeholders to inform an analysis of change. Initial findings indicate that the emergent networks are characterised by more networked-based mode of governance than previous hierarchical models present under UK New Labour. The study also shows the fragility of a reliance on partnership structures and the potential implications for incongruence in delivering policy outcomes and improving access to physical activity and school sport opportunities

Bird Strike Mitigation, Spring 2021

Bird Strike Migration Project for Sustainability Exchange, Washington University in St. Louis, Spring 202