Modal analysis of wave propagation in dispersive media

Surveys on wave propagation in dispersive media have been limited since the pioneering work of Sommerfeld [Ann. Phys. 349, 177 (1914)] by the presence of branches in the integral expression of the wave function. In this article, a method is proposed to eliminate these critical branches and hence to establish a modal expansion of the time-dependent wave function. The different components of the transient waves are physically interpreted as the contributions of distinct sets of modes and characterized accordingly. Then, the modal expansion is used to derive a modified analytical expression of the Sommerfeld precursor improving significantly the description of the amplitude and the oscillating period up to the arrival of the Brillouin precursor. The proposed method and results apply to all waves governed by the Helmholtz equations.Comment: 10 pages, 9 figure

Surgical treatment of giant cardiac aneurysm with pseudoaneurysm in a colon carcinoma patient

Left ventricular pseudoaneurysm is a rare and lethal condition associated with a high risk of rapid enlargement and rupture. It develops after transmural myocardial infarction (MI), cardiac surgery, trauma, or infection. When a left ventricular pseudoaneurysm is detected, surgical repair is recommended due to the high possibility of rupture. In this report, we present surgical treatment of a giant cardiac pseudoaneurysm that occurred after MI in a colon carcinoma patient

Experimental and numerical investigations of free convection heat transfer in solar oven

The use of solar energy for baking, heating or drying represents a sustainable way of solar energy applications with negligible negative effects. Solar oven is an alternative to conventional oven that rely heavily on coal and wood or Electric oven that uses the power from the National grid of which the end users have little or no control. Since the Solar oven uses no fuel and it cost nothing to run, it use are widely promoted especially in situations where minimum fuel consumption or fire risks are considered highly important. As useful as the Solar Oven proved, it major setback in the area of applications has been its future sustainability. For the use of Solar Oven/Cookers to be sustained in the future, the design and development of solar oven must rely on sound analytical tools. Therefore, this work focused on the design and development of the solar oven. To test the performance of the Small Solar Oven a 5000cm3 beaker of water was put into the Oven and the temperature of the water was found to reach 810C after about 3hrs under an average ambient temperature of 300C. On no load test, the oven reached a maximum temperature of 112oC in 6hrs. In order to carry out the parametric studies and improve the performance of the Solar Oven, Mathematical models were developed and solved by using Characteristics-Based Split (CBS) Finite Element Method. The Model results were compared with the Experimental results and a good agreement ware found between the two results

Determinants of Employee Satisfaction (ES) in Public Health Service Organizations (PHSO) in Eastern Province of Sri Lanka: A Pilot Study

Employee satisfaction in public health service organizations is meeting the expectations of employees with respect to psychological, structural and environmental factors. Many authors have studied employee satisfaction in different context in different organizations. This study tries to determine factors affecting employee satisfaction in PHSOs; to know the reliability and validity of items & factors and to create a mathematical equation model. Data are collected in both secondary and primary sources. Researcher collected 41 from employee satisfaction in public health service organisations’ performance during the period of 2012 to 1996. Primary data have been collected using questionnaire. Since this is a pilot study researcher selected only 100 hospital employees out of 3 selected government hospitals in Addalaichenai Divisional Secretariat of Ampara District. Collected questionnaires have been analysed by a factor analysis and regression analysis. Results found that environmental, psychological and structural factors have been factors have been identified as determinants of employee satisfaction in public health service organizations. Values of Cronbach alpha for items in environmental factor, psychological factor and structural factor are 0.961, 0.807 and 0.928. It shows the existence of high reliability among items of these factors. KMO is used to know the statistical validity of factors. In this study, values of KMO environmental factor, psychological factor and structural factor are 0.750, 0.598 and 0.698 respectively. Log log model is the best fitted model than linear models. In terms of this model, environmental, psychological and structural factor explain around 93% of total variation for employee satisfaction. Keywords: Employee satisfaction, Public Health Service Organizations, Eastern Province, Sri Lanka

Meningkatkan Hasil Belajar Siswa Pada Materi Konsep Volume Balok Dan Kubus Melalui Pendekatan Kontruktivisme Di Kelas IV SDN 3 Tonggolobibi

Permasalahan pada penelitian ini adalah rendahnya hasil belajar siswa kelas IV di SDN 3 Tonggolobibi. Tujuan penelitian ini adalah untuk meningkatkan hasil belajar siswa pada materi konsep volume balok dan kubus melalui pendekatan kontruktivisme di kelas IV SDN 3 Tonggolobibi. Penelitian ini menggunakan desain penelitian Kemmis dan Mc. Taggart yang terdiri atas dua siklus. Di mana pada setiap siklus dilaksanakan satu kali pertemuan di kelas dan setiap siklus terdiri empat tahap yaitu perencanaan, pelaksanaan, observasi, dan refleksi. Hasil penelitian menunjukkan bahwa pada tindakan siklus I diperoleh ketuntasan klasikal 35%. dan daya serap klasikal 46,5% Pada tindakan siklus II diperoleh ketuntasan klasikal 85% dan daya serap klasikal 75,5%. Hal ini berarti pembelajaran pada siklus II telah memenuhi indikator keberhasilan dengan nilai daya serap klasikal minimal 70% dan ketuntasan belajar klasikal minimal 80%. Berdasarkan nilai rata-rata daya serap klasikal dan ketuntasan belajar klasikal pada kegiatan pembelajaran siklus II, maka dapat disimpulkan bahwa perbaikan pembelajaran dengan menggunakan pendekatan pembelajaran konstruktivisme dapat meningkatkan Hasil belajar siswa kelas IV pada pembelajaran matematika materi konsep volume kubus dan balok di SDN 3 Tonggolobibi

Determinants of Corporate Performance (CP) in Public Health Service Organizations (PHSO) in Eastern Province of Sri Lanka: A Use of Balanced Score Card (BSC)

Corporate performance in public health service organizations is how public health service organization looks at its patients, key disease treatment service lines, learning & growth and resources. Therefore, many authors have used BSC for organisational performance. This study tries to determine factors affecting performance of PHSOs; know the reliability and validity of items & factors and to create a mathematical equation model. Data are collected in both secondary and primary sources. Researcher collected 54 from corporate performance in public health service organisations’ performance during the period of 2012 to 1996. Primary data have been collected using questionnaire. Since this is a pilot study researcher selected only 100 hospital employees out of 3 selected government hospitals in Addalaichenai Divisional Secretariat of Ampara District. Collected questionnaires have been analysed by a factor analysis and regression analysis. Results found that patient, key service line, learning & growth and resource factors have been identified as performance of public health service organizations. Cronbach alpha for items in these factors are 0.888, 0.807, 0.651 and 0.857. It shows high reliability for items. KMO is used to know the statistical validity of factors. In this study, values of KMO for patient, key service line, learning & growth and resource are 0.687, 0.502, 0.559 and 0.818. Content validity and convergent validity are higher. Discriminant validity are lower statistically. Log log model is the best fitted model than linear models. Keywords: Corporate performance, Public Health Service Organizations, Eastern Province, Sri Lanka, Balanced Score Card (BSC

Impact of service marketing mix on customer satisfaction

Findings of previous studies poorly proved that the impact of all elements of service marketing mix on customer satisfaction. This gap motivated me to do research in banking services to know the impact of service marketing mix on customer satisfaction in two selected branches of Batticaloa District. This study is aimed to know the impact of service marketing mix on customer satisfaction. This study considered 100 banking customers from the selected two branches of Bank of Ceylon in Batticaloa District. For collecting data, questionnires were distributed among the customer for each branch of Bank of Ceylon during the banking hours without disturbing the employees at banks. In this study, if correlation values for service marketing mix elements such as product, place, promotion, price, people, process & physical evidence and customer satisfaction are 0.707, 0.605, 0.685, 0.665, 0.684, 0.504 and 0.670 respectively service marketing mix elements have higher strength of associations with customer satisfaction. Test of hypotheses have proved that service marketing mix has relationship with customer satisfaction. In terms of the values of the R square and adjusted R square of the results of the regression, service marketing mix elements such as product, place, promotion, price, people, process and physical evidence explain around 75% of variation on customer satisfaction. Study concludes that service marketing mix have higher impact on customer satisfaction

One-particle exchange in the double folded potential in a semiclassical approximation

The one-particle exchange in the double folded model is analyzed. To this aim the Extended Thomas-Fermi approach to the one-body density matrix is used. The nucleon- nucleon force with Yukawa, Gauss and Coulomb-type form factors are considered. The energy dependence of the exchange part of the double folded potential is investigated and a comparison of the present approach with former ones is carried out.Comment: 22 pages, LateX, and 6 PostScript figures, (submitted to J.of Phys.G

Relationship between employee aspects and employee performance

Studies found that employee performance is affected by employee aspects such as reward systems, job satisfaction and organizational commitment. However, the relationships among these have not been proved clearly. Thus, this study is attempted to know about the relationship between employee aspects and employee reward. 100 employees were selected five hospitals. Since the value of KMO is greater than 0.5 (0.726) samples taken in this study is enough for factor analysis. Bartlett’s Test of Sphericity is measured by approximate chi- square is also significant. Total variance for employee rewards, job satisfaction and organisational commitment are around 93%. Since correlation values between employee rewards, job satisfaction, organizational commitment and employee performance are 0.711, 0.740 and 0.798 respectively there are strong correlations with employee performance. Results of the regression revealed that R square and adjusted R square reveals the values as 0.643 and 0.631 respectively. These values explain around 64% of total variation on employee performance. Study concludes that employee rewards, job satisfaction, organizational commitment and employee performance

Effect of Permeable Vessel Closure and Gelling Agent on Reduction of Hyperhydricity in in Vitro Culture of Carnation

Hyperhydricity, an abnormal morphological appearance and physiologicalfunction, is an important problem in carnation tissue culture. The problem causes premature flowering, high occurrence of abnormal shoots, difficulty in transferring hyperhydric plantlets to soil, and low survival rate of plantlets. High relative humidity and the water potential are considered as the key factors involved in the abnormality. Furthermore, permeable culture vessel and gelling agent were assured to be high potential treatment to eliminate it. Objective of this research was to reduce hyperhydricity in regenerants of carnation using different permeable vessel closures and gelling agents and to assess the multiplication and acclimatization abilities of recovered shoots. Experiment was arranged in randomized complete block design with four replications. First factor was different types of closure, i.e. cotton wool, plastic wrap, parafilm and aluminium foil, while second one was gelling agents, i.e. bacto agar, phytagel, swallow agar, and Type 900 agar. The recovered shoots were then multiplied, rooted, and acclimatized. The results showed that hyperhydricity was successfully reduced by applying permeable closure (cotton wool and plastic wrap) in combination with Type 900 agar. The combination of plastic wrap and Type 900 agar was the most appropriate treatment in reducing hyperhydricity and producing good quality shoots. The treatment reduced the problem down to 23% of total condition of hyperhydricity (100%) and increased leaf chlorophyll content from 0.0883 to 0.1288 mg mg-1. The plastic wrap was easily applied and cheaper material compared to cotton wool. The recovered shoots were able to produce 1-3 healthy axillary shoots and easily rooted on half-strength MS. The recovered plantlets were simply acclimatized with survival rate up to 100% on kossas peat + soil (1:1, v/v) and flowered 4-5 months after acclimatization with decreasing in number and size of flower