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The design of the high-voltage substation must include consideration for the safe operation and maintenance of the equipment. Switching equipment is used to provide isolation, no-load switching, load switching, and interruption of fault currents. High-voltage power systems are generally operated as a three-phase system, and the imbalance that will occur when operating equipment in a single-phase mode must be considered. Air-insulated high-voltage electrical equipment is usually covered by standards based on assumed ambient temperatures and altitude. High-speed arcing horns are the equipment added to disconnect switches to allow them to interrupt small amounts of charging or magnetizing current. A load break switch is a disconnect switch that has been equipped to provide breaking and making of specified currents. Automatic high-speed grounding switches are applied for protection of power transformers when the cost of supplying other protective equipment is deemed unjustifiable and the amount of system disturbance that the high-speed grounding switch creates is judged acceptable.

The utility of acoustic droplet ejection (ADE), originally used to transfer dimethyl sulfoxide (DMSO) solutions, is expanded beyond the transfer of DMSO to a wide variety of aqueous solutions common to biochemical experiments and assays. Aqueous-based liquids are transferred with high precision (coefficient of variation

This paper proposes and demonstrates optical 3R regeneration techniques for high-performance and scalable 10-Gb/s transmission systems. The 3R structures rely on monolithically integrated all-active semiconductor optical amplifier-based Mach-Zehnder interferometers (SOA-MZIs) for signal reshaping and optical narrowband filtering using a Fabry-Peacuterot filter (FPF) for all-optical clock recovery. The experimental results indicate very stable operation and superior cascadability of the proposed optical 3R structure, allowing error-free and low-penalty 10-Gb/s [pseudorandom bit sequence (PRBS) 223-1 ] return-to-zero (RZ) transmission through a record distance of 1 250 000 km using 10 000 optical 3R stages. Clock-enhancement techniques using a SOA-MZI are then proposed to accommodate the clock performance degradations that arise from dispersion uncompensated transmission. Leveraging such clock-enhancement techniques, we experimentally demonstrate error-free 125 000-km RZ dispersion uncompensated transmission at 10 Gb/s (PRBS 223-1) using 1000 stages of optical 3R regenerators spaced by 125-km large-effective-area fiber spans. To evaluate the proposed optical 3R structures in a relatively realistic environment and to investigate the tradeoff between the cascadability and the spacing of the optical 3R, a fiber recirculation loop is set up with 264- and 462-km deployed fiber. The field-trial experiment achieves error-free 10-Gb/s RZ transmission using PRBS 223-1 through 264 000-km deployed fiber across 1000 stages of optical 3R regenerators spaced by 264-km spans

Acoustic energy can precisely and accurately eject a droplet of liquid from a reservoir, enabling delivery of picoliter and nanoliter volumes (Ellson, R.; Mutz, M.; Browning, B.; Lee, L.; Miller, M.; Papen, R. Transfer of low nanoliter volumes between microplates using focused acoustics—automation considerations. Journal of the Association for Laboratory Automation 2003, 8(5), 29–34). Acoustic droplet ejection has been shown to be extremely precise (coefficients of variation < 2%) over a wide range of dispensed volumes (Ellson, R.; Mutz, M.; Browning, B.; Lee, L.; Miller, M.; Papen, R. Transfer of low nanoliter volumes between microplates using focused acoustics—automation considerations. Journal of the Association for Laboratory Automation 2003, 8(5), 29–34). However, measuring the performance of low-volume fluid transfers can be difficult because the data are often masked by variability in bulk dispensers and fluorescence readers used as part of the overall measurement process (Petersen, J.; Nguyen, J. Comparison of absorbance and fluorescence methods for determining liquid dispensing precision. Journal of the Association for Laboratory Automation 2005, 10(2), 82–87; Rhode, H.; Schulze, M.; Renard, S.; Zimmerman, P.; Moore, T.; Cumme, G.; Horn, A. An improved method for checking HTS/uHTS liquid handling systems. Journal of Biomolecular Screening 2004, 9, 726–733). The fluorophore used must also be stable so that thermal bleaching and photobleaching do not contribute additional variability to the measurements. This study assesses the suitability of fluorescein to measure the precision of fluid transfers of 2.5-nL DMSO droplets. The short-term and long-term stabilities of fluorescein are first qualified using a reference standard. Next, we determine the noise contribution of the filler and reader. Lastly, data are presented for the precision of 5- and 50-nL fluid transfers using this fluorescein measurement process. (JALA 2006;11:233–9)

The aim of the study was to determine whether the application of bulk industrial chemicals (potassium permanganate and water-soluble phosphate fertilizer) to partly oxidized, polyminerallic mine wastes can inhibit sulfide oxidation, and metal and metalloid mobility. The acid producing waste rocks were metal (PbZnCu) and metalloid (AsSb) rich and consisted of major quartz, dickite, illite, and sulfide minerals (e.g. galena, chalcopyrite, tetrahedrite, sphalerite, pyrite, arsenopyrite), as well as minor to trace amounts of pre- and post-mining oxidation products (e.g. hydrated Fe, Cu, Pb and alkali mineral salts). SEM-EDS observations of treated waste material showed that metal, metal-alkali and alkali phosphate coatings developed on all sulfides. The abundance of phosphate phases was dependant on the fertilizer type and the availability of metal and alkali cations in solution. In turn, the release of cations was dependent on the amount of sulfide oxidation induced by KMnO4 during the experiment and the dissolution of soluble sulfates. Manganese, Ca, Fe and Pb phosphates remained stable during H2O2 leaching, preventing acid generation and metal release. In contrast, the lack of complete phosphate coating on arsenopyrite allowed oxidation and leaching of As to proceed. The mobilized As did not form phosphate phases and consequently, As displayed the greatest release from the coated waste. Thus, the application of KMnO4 and the water-soluble phosphate fertilizer Trifos (Ca(H2PO4)2) to partly oxidized, polyminerallic mine wastes suppresses sulfide oxidation and is most effective in inhibiting Cu, Pb and Zn (Sb) release. However, the technique appears ineffective in suppressing oxidation of arsenopyrite and preventing As leaching.

Objectives. To develop a psychometrically robust and widely applicable short form of the Derriford Appearance Scale, (DAS59), which (1) will reliably and validly assess the distress and difficulties experienced in living with problems of appearance, (2) is acceptable to clinical and non-clinical populations, and (3) facilitates research and clinical decision-making through good standardization and sensitivity. Design. Cross-sectional survey designs using clinical (out-patient and in-patient) and general population samples. Method. Twenty-five items were selected initially from the 59 items of the original DAS59. These were refined to 24 through item analyses and the scale was standardized on 535 patients with a range of problems of appearance and on a representative general population sample (N = 1,107). Results. All 24 items contributed well to the total score and internal consistency was high (α = .92). Test-retest reliability (6 months) was good (0.82), and criterion validity, with the DAS59, was excellent (0.88). Good construct validity was demonstrated in differences between (1) patient and general population samples, (2) members of the general population concerned and not concerned about their appearance, and (3) in patterns of convergent and divergent correlations with a range of established scales. The general population data revealed widespread concerns about appearance. Conclusion. The DAS24 provides a widely applicable and acceptable short form of the original DAS59. It is psychometrically robust and discriminates well between patient groups, between clinical and non-clinical populations, and within the general population between those concerned, and those not concerned, about their appearance. © 2005 The British Psychological Society.

We demonstrate error-free dense-wavelength-division multiplexing (DWDM) transmission of 40 40-Gb/s channels with 100-GHz spacing over 10 000 km dispersion-managed fiber using carrier-suppressed return-to-zero differential-phase-shift keying (CSRZ-DPSK), enhanced foward-error correction, and all-Raman-amplified spans with 100-km terrestrial length.

Facial hemangiomas are common benign tumors of infancy. They can mimic the appearance of bruises and parents report false accusations of child abuse by strangers. We investigated perceptions of facial hemangiomas in two professional groups involved in child abuse surveillance. Thirty health visitors and 30 primary school teachers were sent a clinical case questionnaire about a child with an involuting facial hemangioma with a color photograph of the lesion. Nineteen health visitors (63%) and 18 primary school teachers (60%) responded. Seventy-four percent of the health visitors and 11% of the teachers correctly diagnosed a hemangioma. Fifty percent of the teachers were unable to decide on a diagnosis. However, only one health visitor (5%) and one teacher (5%) thought that the lesion was a nonaccidental injury and would involve a child protection advisor. About one-third of health visitors and one-third of teachers expressed concerns that the child could suffer psychologically from teasing by peers at school and about one-third of health visitors were also concerned about the psychological effects of the lesion on the child's parents. Health visitors and teachers were most unlikely to mistake the facial hemangioma in this study for a nonaccidental injury. Language: en

The DAS59 has been designed and developed to meet the need for an objective measure of the spectrum of psychological distress and dysfunction that is characteristic of disfigurements, deformities and aesthetic problems of appearance. Content validity has been assured by basing the scale's items on a detailed autobiographical study of representative patients. Internal consistency is high (0.98) and test-retest reliabilities are good (general population: 0.75; clinical population: 0.86). Correlations with other appropriate standardised tests show good criterion validity and good construct validity. Factor analysis of 2741 data sets (general population and clinical population) identified three factors that are not feature specific and two that are (bodily and sexual features, facial features). The DAS59 thus generates a full-scale score and five factorial sub-scale scores. The DAS59 has been standardised on the clinical population across a range of patient groups and on the general population subdivided into those concerned and those not concerned about appearance. The DAS59 is highly sensitive as a measure of change following treatment with large and significant preoperative-postoperative reductions in full-scale and factorial scores of patients treated for facial features or bodily/sexual features. The DAS59 offers benefits for patient selection in both cosmetic and reconstructive plastic surgery and in the evaluation of outcome. It provides valid and reliable data for clinical audit and governance and for evaluating the merits of one treatment protocol against another.

Using information gathered in the introductory sections of the Derriford Appearance Scales (DAS24 and DAS59), the prevalence and epidemiological characteristics of concern about physical appearance have been determined for a carefully constructed sample of the general population of southwest Devon (rural and urban). In all, 2108 usable replies were received from a postal survey of a targeted population of 5400 men and women, aged 18 and over and randomly selected with constraints for age, sex and socio-economic status. The prevalence of concern about physical appearance was highest among women through to age 60 and younger men. There was no association with socio-economic status or living status. Concerns about the nose, weight and skin disorders were reported most frequently by both men and women and additionally concerns about breasts and abdomen were reported by women and premature balding by men. The mean DAS24 and DAS59 full-scale scores of 19% of male and 25% of female responders who were concerned about appearance exceeded the mean scores of preoperative patients undergoing reconstructive and cosmetic plastic surgery. Concern about appearance is widespread in the general population. More often than not, concern is about one feature only, which runs counter to the hypothesis that concern about appearance reflects a neurotic trait. The high levels of measured psychological distress and dysfunction found in a substantial minority of those in the general population who are concerned about appearance highlight the need for appropriate services.

Objectives. To develop a reliable and valid self-report scale which (1) will assess the distress and difficulties experienced in living with a problem of appearance; (2) can be used with clinical and non-clinical populations; and (3) facilitates clinical decisionmaking and research through good standardization, sensitivity and discrimination. Design.Cross-sectional survey designs using clinical and non-clinical populations and a pre-post intervention design using plastic surgery patients. Method. A large initial item set was refined through a controlled pre-post surgery study and a cross-sectional study of a plastic surgery waiting list (606). The resulting 59-item scale was administered to 1740 patients with problems of appearance and to a representative general population sample (1001). Results. Principal component and factor analyses identified a stable five-factor structure accounting for 63.5% of the variance, with a primary factor of self-consciousness of appearance. Internal consistency was high (alpha= .98) and test-retest reliabilities (three months) were good (.75 (general population); .86 (patients)). Correlations with existing tests showed appropriate criterion validity (.74-.62). Good construct validity was evidenced in pre- and post-operative changes, in differences between patients and controls and in convergent and divergent correlation patterns. The general population data reveal widespread concerns about appearance. Conclusions. The DAS-59 provides a widely acceptable, psychometrically robust, factorial self-report scale to assess distress and dysfunction in problems of appearance across the full range of ‘visibility’ and aetiologies. It is sensitive to therapeutic change and discriminates well between patient groups.

This letter demonstrates optical 3R regeneration in 10-Gb/s nonreturn-to-zero field transmission. The 3R regenerator utilizes semiconductor-optical-amplifier-based Mach-Zehnder interferometer wavelength converters, a synchronous modulator, and a Fabry-Perot filter to realize optical 3R regeneration including all-optical clock recovery. The cascadability of the 3R regenerator is investigated in recirculating loop transmission experiments with various regeneration spacings up to 462 km (corresponding to an input optical signal-to-noise ratio (OSNR) of 22 dB). Transmission with the 3R regenerator shows significant performance improvement over that without 3R regeneration. A 66-km-spaced 3R regeneration with a 33-dB input OSNR achieves 1000-hop cascaded error-free transmission (66 000 km in distance) with no hop-to-hop power penalties. A 264-km-spaced 3R regeneration with a 25-dB input OSNR also achieves 100-hop cascaded transmission (26 400km in distance) with a bit-error-rate error floor at ~1times10-8

Results of IR and 1 H, 13 C, and 31 P NMR studies of the anancomeric title compounds (2‐5) and compound 1 (Scheme 1) are analyzed to search for the existence of high-energy boat or twist-boat conformations in the equatorial epimers. While the difference in frequencies (Dm)P4O between the axial and equatorial compounds and 13 C NMR JPOCC and anti JPOCCH3 values suggest the participation of twist-boat conformations for the equatorial isomers, coupling constants in 1 H NMR JH4H5a or JH6H5a and JH4H5e or JH6H5e of the equatorial isomers 2e‐4e along with the lack of a large 3 JPH in 31 P NMR are consistent with predominant chair conformations. In addition, an X-ray structure of the equatorial 2-p-nitrophenoxy-2-oxo-cis-4,6-dimethyl-1,3,2dioxaphosphorinane (4e) showed that the molecule adopts a chair conformation with no severe ring flattening in the OPO region in the solid state. X-ray structures of trans-4 and trans-5 displayed chair conformations with mild ring flattening especially in the axial methyl region, presumably as a result of the steric

We theoretically and experimentally investigated a prepolarization-mode dispersion (PMD) scheme for self-phase modulation (SPM) suppression. A 3.4-dB improvement in the nonlinear threshold was observed using optimum first- and second-order PMD. We also confirmed that the pre-PMD techniques can coexist with chromatic dispersion management.

We designed and evaluated a fluoride-based high concentration erbium-cerium codoped fiber amplifier. It is suitable for metropolitan area networks due to faster transient, flatter (unfiltered) gain, smaller footprint, and gain excursion than its silica-based counterpart. A detailed study of its transient dynamics has been performed.

A long term review of hypospadias patients repaired over 10 years ago by the split preputial flap technique of Harris was evaluated in 35 patients aged 13 and over. The urinary and sexual function was assessed as well as the psychological status and aesthetic appearance. The long term complications are discussed.

Power Transformers are critical components of modern electrical transmission and distribution systems. Even though they have been developed more than a hundred years ago, voltage and power ratings continue to increase making them even more critical technically and economically. This paper presents current practices on utilization of modern measurement and diagnostic systems as well as controls to support ever increasing needs of system reliability and economical utilization of various sources of generation, including renewable and distributed along with more traditional base load generation sources.

More accurate dose-response curves can be constructed by eliminating aqueous serial dilution of compounds. Traditional serial dilutions that use aqueous diluents can result in errors in dose-response values of up to 4 orders of magnitude for a significant percentage of a compound library. When DMSO is used as the diluent, the errors are reduced but not eliminated. The authors use acoustic drop ejection (ADE) to transfer different volumes of model library compounds, directly creating a concentration gradient series in the receiver assay plate. Sample losses and contamination associated with compound handling are therefore avoided or minimized, particularly in the case of less water-soluble compounds. ADE is particularly well suited for assay miniaturization, but gradient volume dispensing is not limited to miniaturized applications.

Aesthetic plastic surgery has been long practiced for primarily psychological rather than physical benefit to patients. However, evaluation of the psychological impact of aesthetic plastic surgery has often been of limited methodological rigor in both study design and appropriate measurement. This study is intended to evaluate the psychological impact of aesthetic surgery on patients seeking such intervention in regard to concerns about breasts, nose or upper limbs using standardised psychometric instruments. Participants were recruited through the Plastic Surgery Unit (Patients) and general surgery, ENT surgery and Maxillo-facial surgery (Comparisons) at a UK General Hospital. Outcome measures included the Crown-Crisp Experiential Inventory anxiety scale, Beck Depression Inventory and Derriford Appearance Scale-24, a valid and reliable measure of distress and dysfunction in relation to self-consciousness of appearance. Data were collected pre-operatively (T1) and 3 months post-operatively (T2) for both groups. Longitudinal appearance adjustment for the plastic surgery group was also assessed at 12 months (T3). Both groups were less depressed and anxious post-operatively. The improvement in anxiety was significantly greater in the plastic surgery group. Body site specific appearance distress was significantly improved for the plastics group only, and the level of improvement was related to the body site affected. © 2009 Taylor & Francis.

We demonstrate field trial of asynchronous, variable-length packet contention resolution at data-rate of 10-Gb/s in an OLS network testbed built with in-ground field fiber. Both the lab-test and the field trial results indicate error-free operation.

We demonstrate field trial experiments to evaluate a 10-Gb/s optical 3R regenerator using fiber recirculation loops built with 264-km and 462-km SSMF fiber in field. Error-free transmission over 264,000-km with 1,000 optical 3R regeneration stages has been achieved. Experimental results indicate only 1.5-dB power penalty at BER 10-9 after 264,000-km.

We demonstrate 10-Gb/s, error-free transmission over 264,000-km field fiber with 1,000 optical 3R regeneration stages using all-optical clock recovery. Experimental results show only 1.5-dB power penalty at BER 10-9 after 264,000-km transmission.

The Bird Islands support the largest colonies of nesting seabirds in Nova Scotia. From a continental perspective the islands host one of the largest Great Cormorant (Phalacrocorax carbo) colonies in North America and a significant Razorbill (Alca torda) colony. However the islands are best known for nesting Atlantic Puffins (Fratercula arctica). Populations of all species have changed over the past 75 years, none so dramatically as Black-legged Kittiwakes (Rissa tridactyla). Kittiwakes colonized the islands 20 years ago and are now the most numerous nesting seabirds. Two other recent colonists, Herring (Larus argentatus) and Great Black-backed Gulls (L. marinus) are the next most common nesting species on the islands. In contrast the small colony of Common Murres (Uria aalge) and the large colonies of Arctic (Sterna paradisaea) and Common Terns (S. hirundo) of the 1920s have disappeared. Here we present recent estimates of breeding populations and summarize the data on changes in populations in the past 75 years based on a review of the literature, and surveys conducted from boats circumnavigating the islands during 11 different years from 1976 until 2000. The changes in breeding populations of seabirds on the Bird Islands show that their importance for conservation has changed through the years. For example in the 1920s about one third of all nesting Double-crested Cormorants in Nova Scotia were on the Bird Islands. In 1933 no Great Cormorants nested on the islands. In contrast in 2000 they supported the largest colony of Great Cormorants in North America and less than 1% of the Double-crested Cormorants in eastern Canada.En Nouvelle-Écosse, ce sont les îles Bird qui abritent les plus grosses colonies d’oiseaux de mer nicheurs. Les îles hébergent une des plus grosses colonies de Grands Cormorans (Phalacrocorax carbo) de l’Amérique du Nord et une colonie importante de Petits Pingouins (Alca torda). Cependant, les îles sont plus connues pour les Macareux moines (Fratercula arctica). Depuis les 75 dernières années, les populations de toutes les espèces ont changé, mais c’est la population de Mouettes tridactyles (Rissa tridactyla) qui a changé le plus. Il y a vingt ans, ces mouettes ont colonisé les îles et sont devenues les oiseaux de mer les plus abondants à s’y reproduire. Deux autres espèces ayant colonisé les îles depuis peu, le Goéland argenté (Larus argentatus) et le Goéland marin (L. marinus), arrivent au second rang pour ce qui est des oiseaux nicheurs les plus nombreux sur les îles. Par contre, la petite colonie de Guillemots marmettes (Uria aalge) et les grosses colonies de Sternes arctiques (Sterna paradisaea) et de Sternes pierregarins (S. hirundo) qui y vivaient durant les années 1920 ont disparu. Nous présentons ici des évaluations récentes des populations d’oiseaux nicheurs et les tendances démographiques depuis les 75 dernières années à partir d’une revue de la documentation, ainsi que les résultats de relevés effectués dans 11 années, entre 1976 et 2000, à bord de bateaux qui ont fait le tour des îles. Les changements dans les populations d’oiseaux de mer qui se reproduisent sur les îles Bird montrent que leur importance sur le plan de la conservation a varié au cours des années. Par exemple, dans les années 1920, environ un tiers de tous les Cormorans à aigrettes qui nichaient en Nouvelle-Écosse le faisaient sur les îles Bird. En 1933, aucun Grand Cormoran ne nichait sur les îles, tandis qu’en 2000, elles abritaient la plus grosse colonie de cette espèce en Amérique du Nord et moins de 1 % des Cormorans à aigrettes de l’est du Canada.PROC. N.S. INST. SCI. (2004)Volume 42, Part 2, pp. 241-252*

While many system vendors are concerned about losing a generation of well-developed product because of the prolonged slow market, many optical component and subsystem vendors continue to pursue various avenues towards dramatic reduction of total cost of ownership for next generation optical transmission equipment. This paper is intended to provide a carrier's perspective on the potential disruptive impact of the optical integration based new devices to next generation optical transmission equipment. The emphasis is put on emerging applications of these new devices and related technical requirements. By providing the carriers' perspective, this paper may help promote a new line of thinking about what new technologies vendors should focus on in order to make next-generation optical transmission systems much lower in cost, smaller in footprint, and lower in power consumption.

The angle between the principal state of polarization fast and slow modes is investigated. In the presence of polarization dependent loss the angle is shown to become non-orthogonal and vary statistically. It is found that the statistics of the angle only depends on polarization dependent loss and is independent of polarization mode dispersion. This phenomena is investigated through experiments and simulations.

We theoretically and experimentally investigated a pre-PMD scheme for SPM suppression. A 3.4 dB improvement in the nonlinear threshold was observed using optimum first- and second-order PMD. We also confirmed that the pre-PMD techniques can coexist with chromatic dispersion management.

We experimentally compare the robustness of 40Gb/s NRZ, NRZ-VSB, CSRZ, BL-CSRZ, RZ, and RZ-VSB formats in the presence of combined residual CD and 1st order PMD. The result shows that RZ-VSB has the best tolerance without adaptive CD/PMD compensation.

In exploring the question of how humans reason in ambiguous situations or in the absence of complete information, we stumbled onto a body of knowledge that addresses issues beyond the original scope of our effort. We have begun to understand the importance that philosophy, in particular the work of C. S. Peirce, plays in developing models of human cognition and of information theory in general. We have a foundation that can serve as a basis for further studies in cognition and decision making. Peircean philosophy provides a foundation for understanding human reasoning and capturing behavioral characteristics of decision makers due to cultural, physiological, and psychological effects. The present paper describes this philosophical approach to understanding the underpinnings of human reasoning. We present the work of C. S. Peirce, and define sets of fundamental reasoning behavior that would be captured in the mathematical constructs of these newer technologies and would be able to interact in an agent type framework. Further, we propose the adoption of a hybrid reasoning model based on his work for future computational representations or emulations of human cognition.

This paper provides an overview John Holland's Echo model, describes an implementation of the model, documents results from preliminary experiments using the model, and proposes further research in using Echo to study complex adaptive systems. Echo simulates the behavior of complex adaptive systems and can provide an experimental testbed for exploring theories of, and developing tools useful for analyzing these systems. Preliminary results indicate that the dynamic behavior of Echo can be used to generate interesting, time-series data that will be useful for evaluating the applicability of and developing tools, techniques, and possibly general theories, for the analysis of specific complex adaptive systems.

We review the literature and report a series of eight cases of balanitis xerotica obliterans (BXO) developing in patients following primary hypospadias repair. The ages of these patients ranged from 8 to 25 years with BXO developing from 1 to 16 years postoperatively. Six patients were treated by excision of the BXO tissue and two-stage urethroplasties with full-thickness grafts. Three of these patients had further recurrence of BXO and had re-do urethroplasty using a combination of bladder and buccal mucosa. The last two patients in this series had re-do urethroplasty using bladder mucosa only and bladder-buccal mucosa technique, respectively, as first choice for BXO complicating their hypospadias repair.