Archives-June... 

Our work relates to a numerical and experimental study of a solar exchanger designed and tested in Laboratory of Renewable Thermal Energy. This device is a unit for transforming solar radiation into thermal energy. The objective of our work is to study the evolution of temperature in the solar collector-water system. Our results show that this device makes it possible to heat the water during the day. The numerical results show that the temperature rise of the water is 47.84 °C in March and 46.34 °C in April.

Wearable waste sculptures are sometimes regarded as unimaginable and stretching it further as costumes for performance is another, considering the static nature of Sculpture. This elasticity was further stretched in introduction of Port Harcourt contemporary History in the multi-faceted creation called Pot Harcourt. Forging a relationship between various genres of Art and seamlessly doing so was an attempt in this study that has utilized wearable waste sculptures, oral commentary, Music, performance and History. Integration of these genre of arts were brought together to tell the origin of Port Harcourt, through to the contemporary history where the city is bemused with sooth wastes from industrial pollutions. The Arts of Oil, a Cultural History of Port Harcourt, was a collaborative Workshop of University of Port Harcourt, Institute of Niger Delta Studies and University of Oxford provided the platform at University of Port Harcourt Business School on 26th -27th July 2018. This workshop was funded by the Oxford Martin School. It was conceived in order to produce a ‘state of the art’ account of research on the arts of oil in Port Harcourt. Multidisciplinary papers, literature, photography, art, theatre, sociology, anthropology and history were harnessed within the various arts to bring to fore artists and scholars into creative dialogue about Port Harcourt contemporary History. This paper that has utilized qualitative mode of writing with methodical tools of observation and sculpture studio practices of dicing, piercing stringing and cumulating with movement and music rendition accompanied with descriptive narration in performance. A different vista for sculptures was projected to move away from the classical motionless characteristics of ancient Sculptures to that can be worn for mobile performances. That has situated Pot Harcourt which is like a bowl of salad that compromises various vegetables but delightfully blended by the salad cream to the delight of the consumer which in this case was the Port Harcourt art community as the audience.

In today’s world, social networking website like twitter, facebook, tumbler, etc. plays a very significant role. twitter is a micro-blogging platform which provides a tremendous amount of data which can be used for various applications of sentiment analysis like predictions, reviews, elections, marketing, etc. sentiment analysis is a process of extracting information from large amount of data, and classifies them into different classes called sentiments. python is simple yet powerful, high-level, interpreted and dynamic programming language, which is well known for its functionality of processing natural language data by using nltk (natural language toolkit). nltk is a library of python, which provides a base for building programs and classification of data. nltk also provide graphical demonstration for representing various results or trends and it also provide sample data to train and test various classifiers respectively.

In this paper, we consider a deterministic mathematical model for the transmission dynamics of an infectious disease in a community. Although, the equilibria of the model could not be expressed analytically, their existence and the threshold conditions for their stability are theoretically and numerically investigated. We analyzed the stability of the model using the linearization techniques via the Jacobian matrix approach and the Routh-Hurwitz stability criteria to determine the equilibria for the model. The basic reproductive number of the model was determined using the next generation matrix operator. Their numerical results were shown in graphical forms using some hypothetical values for the parameters used in the model. It was shown graphically that the mathematical model produced asymptotically stable population when the parameter values are perturbed to a certain degree.

Abstract In the health care industry today, failed programs cost organizations a loss of revenues on daily basis. Therefore, management strategies in these organizations need a balance (equilibrium) between program implementation control and the relationships that goes along. These relationships exist between the organization and defined individuals or groups who are directly or indirectly part of the organization’s hierarchy. These groups or individuals comprise the so-called stakeholders and they do have a stake in the organization. A major factor for a program success with any organization is the proactive involvement and management of its strategies with its component staff, including the stakeholders (Thomas, Delisle & Jugdev, 2002). The argument is organizations should look at their stakeholders as part of core management objectives for maximum return of investment. Many organizational programs have failed due to lack of direct top management involvement and support (Jiang and Klein, 1999). The importance of this problem therefore, requires that every organization examine its relationships with its stakeholders constantly since its success or failure revolves around these relationships. Findings: Findings from this study were of great economic importance. The identification, prioritization, and engagement strategies of evaluation of the key stakeholders in Mission Hospital, USA, was an effective tool that could help any organization to know the individuals or groups with power within their organization and how such powers are used. The second importance was the power of teamwork; how individuals or groups may collaborate for a common good; here both the executive management of Mission Hospital, USA, collaborating with the stakeholder management to affect the objectives and goals of the hospital. Third, it showed improved relationships between two former unaligned managers with informal power structures and possible outcome. The conclusion here was that collaboration, involvement, negotiations with the use of inducements; all play major roles in straightening relationships, be it personal or corporate. Statement of the problem: The specific statement of the problem of this study examined management and program implications when upper management and related management (stakeholder management) do not collaborate and involve in pursuing the strategic objectives and goals of the corporation. Many projects, and indeed corporations, have failed for lack of management involvement of component staff in management strategies. Description of design method: The design methodology was in three phases. Phase1 involved the interaction process of identifying, prioritizing, and engaging the key stakeholders of the hospital. Phase2 involved the data gathering techniques, including workshops exercises with the participants. Survey questionnaires were designed separately for the hospital’s management and the identified key stakeholders. The exercises were open-ended and interactive processes with the participants. The outcome was important in that it provided the necessary factors for effective stakeholder management. From the collection and analysis of data, phase 3 was a descriptive case study designed to effect phase 2, through the process of planning, implementing, and monitoring – used in the incremental process improvement management (Carroll & Swatman, 2000). The investigator went further with fact-finding interviews with employees of the hospital. The results findings were spectacular. Design of the study: The purpose of this study was to examine and encourage upper management strategy of Mission Hospital, USA, in order to improve its stakeholder relationships. The study used rationale to establish and analyze outcomes, allowed prediction, and aim for generalization. In order to articulate the stakeholder’s perception of values to the organization pertinent questions were designed to affect the study. The main research question of the study was directed to the hospital’s executive management, challenging them to commitment to teamwork for the overall benefits of the hospital’s objectives and goals attainment. A stakeholder management methodology workshops exercises were designed to assist them in this process. The subject sample group was small. The criteria for the small group were to use a phenomenological approach to find out how a few groups or individuals of important status in an organization feel as a sub-set; making it a qualitative descriptive case study. Significance of conclusions: The implications of notice in this case study on stakeholder management in Mission Hospital, USA, was exploratory yet unique, and based on the combination of qualitative and quantitative designs with limited results. The study is unique in that no similar study exits presently with direct involvements of inside power brokers. Nevertheless, the analysis should be viewed as suggestive, and not one hundred percent definitive. Certain unresolved issues still remains, the resolution of which should challenge practicing health care managers on how to manage their stakeholders to attain the objectives and goals of their organization. However, this investigator presented many suggestions to the management of Mission Hospital, USA, to any promising manager of health care, and to future researchers of health care management in general. Recommendations: The confirmation of the “Pilot study” of this case study should encourage a more detailed research study of economic benefits with stakeholder management collaborations. Such study should be broadened and without any restrictions, as was witnessed in this case study.

This paper advances research on strategic entrepreneurship and small firm competitiveness from the Resource-Based perspective. Several scholars have explained the Resource-Based View mainly in the context of the large firms. The paper considers a review of literatures on strategic entrepreneurship and the Resource-Based View and contends small firms lack resources compared with the large ones, however, their “opportunity-seeking” activities is a rare resource. It is opined an understanding of the interactions of these concepts, that is, the simultaneous pursuit of “opportunity- and advantage-seeking” positions is critical for small firms that operate in dynamic competitive environments to create and sustain competitive advantages.

In the contemporary settings of 2020 and after, international airlines' alliance ground staff operations environment, a possible deficit in the formulation and implementation of effective strategies to ensure a diverse and inclusive workforce has the potential to affect an organization dearly and adversely. From exhaustive review and analysis, some U.S.-based international airline alliance leaders appear concerned with the challenges faced to ensure an inclusive and diverse workforce, as it has deleterious potential to negatively affect corporate sustainability and profitability. Grounded in the transformational leadership theory, the purpose of this single case study was to explore strategies U.S.-based international airline alliance leaders in ground staff operations use to successfully manage a diverse workforce to ensure organizational sustainability and profitability. Data were collected using semistructured interviews in computer-mediated conferencing format with five airline alliance leaders located in the state of Georgia, who held at least 2 years of successful experience in implementing strategies to manage a diverse workforce. Content and thematic analytical approaches served to analyze the data, leading to the emergence of a major theme of the importance of diversity and inclusion. From extensive research and the subsequent analysis of the data, a key recommendation is for airline alliance leaders to align diversity, equity, and inclusion policies with corporate human resources strategy. The expectations of contributing to positive social change are assured in employment, and the context of this study is possible if airline alliance business leaders display the management qualities in fostering a diverse and inclusive workforce, where the employee has opportunities to realize their potential within the enterprise.

Azolla is very known biofertilizer for rice cultivation it can enrich soil N2 content and for the soil fertility. In view of this, an invitro study was carried out on morphometric studies on Anabaena azollae present in two species of Azolla fern (A.microphylla, and A. fulicolides). The selected Azolla species were grown in standard medium prepared with garden soil, cow dung, super phosphate and its combinations in separate containers. The matured Azolla cultures were observed for its growth profile viz. number of leaflets per plant and fresh & dry weight of whole plant on 15d and 21d. Followed by, the morphometric study on symbiotic cyanobacteria present in the leaf cavities of two species of Azolla was determined through observing average number of cyanobaterial filament in the leaf cavity of azolla, length of each cyanobacterial filament, number of vegetative cells and number & position of heterocyst in each cyanobacterial filament.

Lipid composition of the brain oils of bull and hen found in Nigeria was determined by gas chromatography. SFA level ranged from 6.11 to 6.54 % of total fatty acids. MUFA was close to each other in the samples and composed the third largest fraction of 8.89 to 9.86 %. The n-6 PUFA constituted the second largest group of 35.4 to 39.0 % whereas the n-3 PUFA of 46.0 to 48.1 % formed the largest group. Most concentrated SFA was lignoceric acid, highest MUFA was erucic acid, highest n-6 was arachidonic acid whilst docosahexaenoic acid (DHA) was the highest n-3 PUFA. Cholesterol was the only sterol detected, 589 to 874 mg/100 g. The highest phospholipid was phosphatidylcholine having a range of 29.1 (60.4 %) to 20.2 (59.6 %) mg/100 g. 100 g bull brain would provide 8.56 g of DHA, 100 g hen brain would provide 9.47 g of DHA.

Cadmium Sulphide (CdS) thin films of different thickness are prepared by the chemical bath deposition technique on well cleaned glass substrates at various temperatures. The thicknesses of the deposited films have been determined by gravimetry. The structural characterization is carried out by X-ray diffraction. The study confirms the polycrystalline nature of films with hexagonal structure. The structural parameters such as grain size, dislocation density, strain and lattice parameters have been evaluated. The composition of various constituents in CdS films have been determined by energy dispersive X-ray analysis. The optical properties like optical transmittance, band gap and refractive index has been studied in detail for the CdS films of various thicknesses which would be a promising material for the photo-voltaic applications. This paper deals with structural and optical properties of chemically deposited CdS films at the temperatures 600 C and 700 C  with the composition of CdCl2 in aqueous solution 0.2 gm and 0.3 gm.