Dispositional effects on job and life satisfaction: The role of core evaluations.

Past research has suggested that dispositional sources of job satisfaction can be traced to measures of affective temperament. The present research focused on another concept, core self-evaluations, which were hypothesized to comprise self-esteem, generalized self-efficacy, locus of control, and nonneuroticism. A model hypothesized that core self-evaluations would have direct effects on job and life satisfaction. It also was hypothesized that core self-evaluations would have indirect effects on job satisfaction. Data were collected from 3 independent samples in 2 countries, using dual source methodology. Results indicated that core self-evaluations had direct and indirect effects on job and life satisfaction. The statistical and logical relationship among core evaluations, affective disposition, and satisfaction was explored. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A genetic study of maternal and paternal ratings of problem behaviors in 3-year-old twins.

Genetic and environmental influences on problem behaviors were studied in 3-yr-old twins. Fathers' and mothers' ratings of problem behaviors in twins (236 monozygotic [MZ] girls, 210 MZ boys, 238 dizygotic [DZ] girls, 265 DZ boys, and 409 DZ opposite sex pairs) were obtained with the Child Behavior Checklist for Ages 2–3 (T. M. Achenbach, 1992). Twin correlations and results from a model fitting approach showed that genetic, shared environmental, and nonshared environmental influences accounted on average for about 64%, 9%, and 27% of the variance. Although shared environmental influences were small for most scales, they were important for Total Problems and somewhat larger for Externalizing than for Internalizing behaviors. Significant sex differences in genetic and environmental influences and evidence for sibling contrast effects were found for the Overactive scale. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Solution viscosity and structural modification of pumpkin biopectin

Solutions of ‘biopectin’ obtained from pumpkin pulp by digestion with the multi-enzyme culture supernatant from Bacillus polymyxa (strain 88A) were prepared in 0.10 M NaCl and characterised by rotational viscosity measurements at 20 °C. The resulting double-logarithmic plot of specific viscosity versus the product of concentration (c) and intrinsic viscosity ([η], from combined Huggins and Kraemer extrapolation to c=0) showed a sharp increase in slope at c[η]≈1 in comparison with the normal value of c[η]≈4 for disordered coils, suggesting a branched structure, possibly arising from Ca²⁺-mediated association of constituent chains.Pumpkin biopectin is non-gelling, in marked contrast to the pectin obtained from the same source by conventional extraction with acid, although the yield is more than doubled. Attempts to induce gelation (with 70 wt% solids at low pH or with stoichiometric Ca²⁺ at neutral pH) by removing the high content of divalent cations naturally present in the biopectin and by chemical deacetylation under acidic conditions (pH 1.2; 4 days; 40 °C) proved unsuccessful. Further research using enzymic deacetylation is suggested.     

Incremental Volume Rendering Using Hierarchical Compression

We present a new algorithm here for efficient incremental rendering of volumetric datasets. The primary goal of this algorithm is to give average workstations the ability to efficiently render volume data received over relatively low bandwidth network links in such a way that rapid user feedback is maintained. Common limitations of workstation rendering of volume data include: large memory overheads, the requirement of expensive rendering hardware, and high speed processing ability. The rendering algorithm presented here overcomes these problems by making use of the efficient Shear-Warp Factorisation method which does not require specialised graphics hardware. However the original Shear-Warp algorithm suffers from a high memory overhead and does not provide for incremental rendering which is required should rapid user feedback be maintained. Our algorithm represents the volumetric data using a hierarchical data structure which provides for the incremental classification and rendering of volume data. This exploits the multiscale nature of the octree data structure. The algorithm reduces the memory footprint of the original Shear-Warp Factorisation algorithm by a factor of more than two, while maintaining good rendering performance. These factors make our octree algorithm more suitable for implementation on average desktop workstations for the purposes of interactive exploration of volume models over a network. Results from tests using typical volume datasets will be presented which demonstrate the ability of the algorithm to achieve high rendering rates for both incremental rendering and standard rendering while reducing the runtime memory requirements.     

Reducing Data Hazards on Multi-pipelined DSP Architecture with Loop Scheduling

Computation intensive DSP applications usually require parallel/pipelined processors in order to meet specific timing requirements. Data hazards are a major obstacle against the high performance of pipelined systems. This paper presents a novel efficient loop scheduling algorithm that reduces data hazards for such DSP applications. This algorithm has been embedded in a tool, called SHARP, which schedules a pipelined data flow graph to multiple pipelined units while hiding the underlying data hazards and minimizing the execution time. This paper reports significant improvement for some well-known benchmarks showing the efficiency of the scheduling algorithm and the flexibility of the simulation tool.     

Successful Treatment of Tuberculous and Nocardial Arthritis in a Hemodialysis Patient with Subsequent Kidney Transplant

A 42‐year‐old physician on maintenance hemodialysis for chronic renal failure presented with intermittent fever and arthritis of the right knee. Synovectomy specimen of the right knee showed caseating granuloma, consistent with tuberculosis, which was successfully treated with a four‐drug regimen of anti‐tuberculous therapy. Subsequently, he had a recurrent effusion of the same joint, which on aspiration showed nocardial infection. He was treated with a combination therapy (sulfamethoxazole‐trimethoprim and amoxicillin) for four months. He underwent a successful living‐related transplant two months later, and was doing well on triple immunosuppression one year after transplantation.     

Comparison of electrochromic amorphous and crystalline tungsten oxide films

A detailed systematic study of the tungsten oxide thin films has been carried out using WO₃ films after they were annealed at progressively increasing temperatures ranging from 350°C to 450°C in oxygen environments. The structural properties of the films were characterized using X-ray diffraction and Raman spectroscopy. The amorphous WO₃ films remain as an amorphous phase up to 385°C and begin to crystallize at 390°C and then are completely crystallized at 450°C. Absorption peaks of the films are found to shift to a higher energy side with increasing annealing temperature up to 385°C and then shift abruptly to a lower energy as the films begin to crystallize at 390°C. Deconvolution of the absorption spectra shows that there are two different polaron transitions in the amorphous WO₃ films.     

Identification and characterization of kraken, a gene encoding a putative hydrolytic enzyme in Drosophila melanogaster

BACKGROUND AND AIMS OF THE STUDY: The study aimed to determine the clinical performance of bovine pericardial aldehyde-treated products alone or in combination with aortic leaflets of porcine origin. These included a composite porcine stentless aortic valve attached to a scalloped pericardial tube (BSAV), and valved and non-valved bovine pericardial conduits for use in left-sided heart lesions (BPG). METHODS: For BSAV grafts, between January 1990 and August 1996, 163 patients (119 males) had their aortic valves replaced by SJM Biocor BASV. Mean age was 37.9 +/- 17.6 years (range: 1 to 76 years). Rheumatic heart disease sequelae (n = 72) and replacement of a prosthetic heart valve (n = 46) were predominant. Preoperative NYHA functional class showed 90 patients (55.2%) in class III and 50 (30.7%) in class IV. BPVC and NVPC grafts were used in 166 patients: acute aortic dissection was the main indication in 52 (31.3%) and chronic in 36 (21/7%). The ascending aorta was involved in 141 patients (84.9%); grafts were seldom used at other sites. In most patients the graft implanted was either a non-valved (n = 79) or a valved (n = 75) pericardial conduit. Twelve patients had a localized lesion and required a patch repair. RESULTS: For BASV grafts, the non-valve-related hospital mortality rate was 4.9%. There were 14.7% non-fatal complications with full recovery of all patients. Mean follow up in 141 patients was 3.0 +/- 1.4 years (range: 1 month to 7.2 years); 14 patients were lost to follow up. Late, non-conduit-related, mortality occurred in seven patients (4.9%). Eight patients underwent reoperation. The current clinical follow up of 127 patients has shown 118 (92.9%) with competent valves and nine (7.0%) with mild stable aortic insufficiency. For BPVC and NVPC grafts, hospital mortality rate was 16.9%, death being related to poor preoperative clinical condition. Postoperative follow up was accomplished in 125 patients; reoperation was necessary in seven patients. Histology showed good tissue preservation up to five years; echocardiography revealed satisfactory findings. No valved conduit had to be reoperated for valve or pericardial tissue wear. CONCLUSIONS: Clinical results of left-sided heterologous pericardial grafts have shown excellent performance over time. The BASV (over seven years) and BPVC and NVPC (eight years) have demonstrated superior results as aortic valves alone or in combination with a pericardial conduit.     

Contract strategy for design management in the design and build system

Project team members in design–build system, including owner’s representatives, design–build (D/B) contractors and architects/engineers, have to adopt new roles in managing the design of large-scale projects. The design responsibility is transferred from the owner’s organization to the D/B contractor who is responsible for the design management in the projects to be delivered by the design–build procurement system. However, there remains the concern of design management between the designer and the constructor within the D/B organization, or between the joint venture parties of a D/B project. This paper presents a study, which reviews the issues concerning the design liability and contractual provisions for design management between the designer and D/B contractor in the said contractual arrangements of design–build system. It disseminates the results of a questionnaire survey and structured interviews of three groups of project participants: owners, designers and D/B contractors. The roles and responsibilities of the parties involved in design and design management are less than clear in their respective engagement contracts. In order to improve the design management of design–build projects, this paper recommended some strategic items to be considered in drafting contracts between owners/D/B contractors, D/B contractors/designers and owners/independent checkers to address the issues.