An overview of out-of-step protection in power systems

Power system is subjected to an extensive variety of little or bigger disturbance to the system during the operation. The power system that designed as one of the main requirement is to survive from the larger type of disturbances like faults. The power swing in certain system is the variation in three phase power flow in the power system. This paper mainly discussed the power swing and distance relay and the effect of the power swing on the distance relay and demonstrate about the basic power system stability and power swing phenomena. Moreover, out of step protection and detection applications are revised as well. At the end, the paper also demonstrated the past study of out of step application of TNB 275 KV network

Effect of sintering temperature on the microstructure, electrical and magnetotransport properties of La0.67Sr0.33MnO3 compound

In this work, we report the effect of sintering temperature (900°C, 1000°C, 1100°C and 1200°C) on the electrical and magnetotransport properties of polycrystalline La0.67Sr0.33MnO3 (LSMO). Single phase of LSMO hexagonal structure (R-3c) accompanied with minor phases was successfully synthesized by co-precipitation method. With increasing sintering temperature, grain growth was promoted and grain connectivity was improved. It was found that an enhancement of resistivity on smaller grain size was due to larger grain surface over volume (grain boundaries effect). The shifting of the metal-insulator transition (TMI) to higher temperature was also responsible for observed changes in physical properties. TMI of 900°C, 1000°C and 1100°C were 232 K, 278 K and 298 K respectively however 1200°C was out of measurement range (higher than 300 K). In summary, CP900 with smaller grain size distribution (~200 nm) displayed the highest resistivity and MR% of -19.2% (at 80 K, 10 kG)

Effects of manual lymphatic drainage on breast cancer-related lymphedema: a systematic review and meta-analysis of randomized controlled trials

BACKGROUND: Lymphedema is a common complication of axillary dissection for breast cancer. We investigated whether manual lymphatic drainage (MLD) could prevent or manage limb edema in women after breast-cancer surgery. METHODS: We performed a systematic review and meta-analysis of published randomized controlled trials (RCTs) to evaluate the effectiveness of MLD in the prevention and treatment of breast-cancer-related lymphedema. The PubMed, EMBASE, CINAHL, Physiotherapy Evidence Database (PEDro), SCOPUS, and Cochrane Central Register of Controlled Trials electronic databases were searched for articles on MLD published before December 2012, with no language restrictions. The primary outcome for prevention was the incidence of postoperative lymphedema. The outcome for management of lymphedema was a reduction in edema volume. RESULTS: In total, 10 RCTs with 566 patients were identified. Two studies evaluating the preventive outcome of MLD found no significant difference in the incidence of lymphedema between the MLD and standard treatment groups, with a risk ratio of 0.63 and a 95% confidence interval (CI) of 0.14 to 2.82. Seven studies assessed the reduction in arm volume, and found no significant difference between the MLD and standard treatment groups, with a weighted mean difference of 75.12 (95% CI, −9.34 to 159.58). CONCLUSIONS: The current evidence from RCTs does not support the use of MLD in preventing or treating lymphedema. However, clinical and statistical inconsistencies between the various studies confounded our evaluation of the effect of MLD on breast-cancer-related lymphedema

A Proposed Model Of Business Co-Creation For Service Innovation

This study explores the dynamics of collaboration between travel agents and their suppliers in co-creating value for their customers. It examines the relationship among co-creation elements, service innovation, technology adoption and environmental change. Results indicate that all the above effects are significant

Suitability of a screening scale for high-need older adults in the community

This presentation introduces the suitability of a brief and user-friendly screening scale to identify high-need older adults in the community for global nurse practitioners/researchers who work with community older adults. The reliability, validity, and diagnostic accuracy of the screening instrument will be presented

Content validation of an instrument for identifying high-need older adults in the community

This presentation introduces a brief and user-friendly screening scale to identify high-need older adults in the community for global nurse practitioners/researchers who work with community older adults. The developmental process of the screening instrument will be presented

Towards experimental entanglement connection with atomic ensembles in the single excitation regime

We present a protocol for performing entanglement connection between pairs of atomic ensembles in the single excitation regime. Two pairs are prepared in an asynchronous fashion and then connected via a Bell measurement. The resulting state of the two remaining ensembles is mapped to photonic modes and a reduced density matrix is then reconstructed. Our observations confirm for the first time the creation of coherence between atomic systems that never interacted, a first step towards entanglement connection, a critical requirement for quantum networking and long distance quantum communications

Portraying older age in television advertisements: a comparative study between the UK and Taiwan

This thesis is a cross-cultural comparative study on media representations of older people in UK and Taiwanese TV advertisements. Three analytical approaches (content analysis, the constant comparative method and critical discourse analysis) were employed. The content analytical study in this thesis revealed that older people were still under-represented as suggested in existing literature. Role salience and visibility of older characters were greater in Taiwanese TV advertisements than in UK TV advertisements. Taiwanese older characters were more likely associated with family relationships and indoor/home contexts while UK older characters were more frequently depicted at outdoor and entertainment settings. Nine character types emerged in the constant comparative study to describe media representations of older people in UK and Taiwanese TV advertisements. They are 'Competent', 'Conservative/Traditional', 'Engaged in Female-Male Relations', 'Golden Ager', 'Humorous', 'Unwell and Declining Health', 'Incompetent', 'Engaged in Intergenerational Relations', and 'Vulnerable'. Results of the cross-cultural comparisons indicated that the Confucian tradition of filial piety was a defining factor that distinguished the portrayals of older adults in Taiwanese TV adverts from those in the UK TV adverts. The critical discourse analysis in this thesis focused on UK and Taiwanese TV adverts for over 50s life insurance products. It was found that a positive construction of ageing was commonly linked to consumer choices so as to legitimate the advertised products (targeting older people) in the two cultural contexts. However, the positive ageing was arguably offset by ageist ideological presuppositions behind the product messages which conventionally highlighted low cost, eligibility, medical exemption and free gifts both in the UK and Taiwanese dat