196 research outputs found
The Program Evaluation of Education and Training Leadership IV at Makassar Education and Training Religious Center Using Kirkpatrick Model
This research aimed to know the effectiveness of the education and training leadership IV at Makassar Education and Training Religious Center using the four-level evaluation of Kirkpatrick Models, namely: reaction, learning, behavior, and result. The evaluation results on reaction level which have not satisfied the participants were the mastery of the materials and the ability of the trainers to use case samples according to participants' duties and functions, the relevance of materials to participants' duties and functions, assigned tasks, dorm comforts, learning facilities, sports and recreation center, food service and hospitality, as well as the appearance of the waiter in the dining room. There was an improvement of learning outcomes on the evaluation results on learning level. The less satisfactory evaluation results on behavior level was the ability of the education and training alumni to develop a solid working team and making decisions. On the result level was the quality of service of educnation and training alumni. To improve the service quality of the education and training leadership IV, the Makassar Religious Training Center should manage the findings which were less satisfactory on every aspect mentioned above
Dynamics of a Double-Impulsive Control Model of Integrated Pest Management Using Perturbation Methods and Floquet Theory
We formulate an integrated pest management model to control natural pests of
the crop through the periodic application of biopesticide and chemical
pesticides. In a theoretical analysis of the system pest eradication, a
periodic solution is found and established. All the system variables are proved
to be bounded. Our main goal is then to ensure that pesticides are optimized,
in terms of pesticide concentration and pesticide application frequency, and
that the optimum combination of pesticides is found to provide the most benefit
to the crop. By using Floquet theory and the small amplitude perturbation
method, we prove that the pest eradication periodic solution is locally and
globally stable. The acquired results establish a threshold time limit for the
impulsive release of various controls as well as some valid theoretical
conclusions for effective pest management. Furthermore, after a numerical
comparison, we conclude that integrated pest management is more effective than
single biological or chemical controls. Finally, we illustrate the analytical
results through numerical simulations.Comment: This is a preprint of a paper whose final and definite form is
published Open Access in 'Axioms' at [https://doi.org/10.3390/axioms12040391
Farming awareness based optimum interventions for crop pest control
We develop a mathematical model, based on a system of ordinary differential
equations, to the upshot of farming alertness in crop pest administration,
bearing in mind plant biomass, pest, and level of control. Main qualitative
analysis of the proposed mathematical model, akin to both pest-free and
coexistence equilibrium points and stability analysis, is investigated. We show
that all solutions of the model are positive and bounded with initial
conditions in a certain significant set. The local stability of pest-free and
coexistence equilibria is shown using the Routh-Hurwitz criterion. Moreover, we
prove that when a threshold value is less than one, then the pest-free
equilibrium is locally asymptotically stable. To get optimum interventions for
crop pests, that is, to decrease the number of pests in the crop field, we
apply optimal control theory and find the corresponding optimal controls. We
establish existence of optimal controls and characterize them using
Pontryagin's minimum principle. Finally, we make use of numerical simulations
to illustrate the theoretical analysis of the proposed model, with and without
control measures.Comment: This is a preprint of a paper whose final and definite form is
published Open Access in 'Mathematical Biosciences and Engineering',
available in [https://doi.org/10.3934/mbe.2021272]. Please cite this article
as: T. Abraha, F. Al Basir, L. L. Obsu and D. F. M. Torres, Farming awareness
based optimum interventions for crop pest control, Math. Biosci. Eng. 18
(2021), no. 5, 5364--539
Crowdfunding Among Event Entrepreneurs: A Conceptual Paper
This paper aims to uncover the benefits of crowdfunding among Event Entrepreneurs in Malaysia. The study reviews literature on the definition, discussion and its revolution related to capital -raising, networking, investment, and crowdfunding among Event Entrepreneurs. The method used for this paper is based on literature reviews from journal articles, conference proceedings, newspaper, books and internet search related to this research area. The conceptual framework is recommended in the end of the paper as it allows reader to understand how the benefits will affects towards crowdfunding among Event Entrepreneurs. Hence, it will provide more research interest in crowdfunding in the future.
Keywords: crowdfunding, event, event crowdfundin
Synonymous non-taxonomic relations extraction
Construction of ontology is a difficult task, expensive and time-consuming. Concept, taxonomy and non-taxonomic relations, are the three important components in the development of ontology. These three components are used
to represent the whole domain texts. Currently, most of studies focused on extracting the concept, the taxonomic
relationships and the non-taxonomic relationships within the scope of single sentence. In order to enrich the domain
ontology, we introduced a method to extract the non-taxonomic relations by using the similarities of relations that exist in more than one sentence. The most appropriate predicate are used as a reference to relate between concepts that occur not only in the same sentence, but also in different sentences. Here, the proposed method was tested using a collection of domain texts that described electronic voting machine and are evaluated based on the standard information retrieval performance metrics, i.e. precision and recall
Cardiac Tamponade Secondary to COVID-19
A 67-year-old female presented with upper respiratory symptoms and was diagnosed with COVID-19. She was found to have a large hemorrhagic pericardial effusion with echocardiographic signs of tamponade and mild left ventricular impairment. Clinical course was complicated by development of Takotsubo cardiomyopathy. She was treated with pericardiocentesis, colchicine, corticosteroids and hydroxychloroquine with improvement in symptoms
Effects of vector maturation time on the dynamics of cassava mosaic disease
Many plant diseases are caused by plant viruses that are often transmitted to plants by vectors. For instance, the cassava mosaic disease, which is spread by whiteflies, has a significant negative effect on plant growth and development. Since only mature whiteflies can contribute to the spread of the cassava mosaic virus, and the maturation time is non-negligible compared to whitefly lifetime, it is important to consider the effects this maturation time can have on the dynamics. In this paper, we propose a mathematical model for dynamics of cassava mosaic disease that includes immature and mature vectors and explicitly includes a time delay representing vector maturation time. A special feature of our plant epidemic model is that vector recruitment is negatively related to the delayed ratio between vector density and plant density. We identify conditions of biological feasibility and stability of different steady states in terms of system parameters and the time delay. Numerical stability analyses and simulations are performed to explore the role of various parameters, and to illustrate the behaviour of the model in different dynamical regimes. We show that the maturation delay may stabilise epidemiological dynamics that would otherwise be cyclic
Aberrant expression and constitutive activation of STAT3 in cervical carcinogenesis: implications in high-risk human papillomavirus infection
<p>Abstract</p> <p>Background</p> <p>Recent observations indicate potential role of transcription factor STAT3 in cervical cancer development but its role specifically with respect to HPV infection is not known. Present study has been designed to investigate expression and activation of STAT3 in cervical precancer and cancer in relation to HPV infection during cervical carcinogenesis. Established cervical cancer cell lines and prospectively-collected cervical precancer and cancer tissues were analyzed for the HPV positivity and evaluated for STAT3 expression and its phosphorylation by immunoblotting and immunohistochemistry whereas STAT3-specific DNA binding activity was examined by gel-shift assays.</p> <p>Results</p> <p>Analysis of 120 tissues from cervical precancer and cancer lesions or from normal cervix revealed differentially high levels of constitutively active STAT3 in cervical precancer and cancer lesions, whereas it was absent in normal controls. Similarly, a high level of constitutively active STAT3 expression was observed in HPV-positive cervical cancer cell lines when compared to that of HPV-negative cells. Expression and activity of STAT3 were found to change as a function of severity of cervical lesions from precancer to cancer. Expression of active pSTAT3 was specifically high in cervical precancer and cancer lesions found positive for HPV16. Interestingly, site-specific accumulation of STAT3 was observed in basal and suprabasal layers of HPV16-positive early precancer lesions which is indicative of possible involvement of STAT3 in establishment of HPV infection. In HPV16-positive cases, STAT3 expression and activity were distinctively higher in poorly-differentiated lesions with advanced histopathological grades.</p> <p>Conclusion</p> <p>We demonstrate that in the presence of HPV16, STAT3 is aberrantly-expressed and constitutively-activated in cervical cancer which increases as the lesion progresses thus indicating its potential role in progression of HPV16-mediated cervical carcinogenesis.</p
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