PERANCANGAN SISTEM INFORMASI E-LEARNING PADA STIKES PEMBINA PALEMBANG

Sistem e-learning dengan berbagai macam kelebihannya yang saat ini telah menjadi pilihan utama para kalangan akademik untuk membuat pembelajaran baru dalam proses belajar mengajar dibidang pendidikan dan merupakan cara alternatif yang cocok diterapkan dalam rangka pemahaman terhadap suatu materi pelajaran pada saat ini. E-learning merupakan penyampaian informasi, komunikasi, pendidikan dan pelatihan secara online. Hal ini tidak berarti e-learning menggantikan model belajar konvensional di dalam kelas, tetapi memperkuat model belajar tersebut melalui pengayaan konten dan pengembangan teknologi pendidikan. Dalam hal ini sistem e-learning yang dikembangkan adalah berbasis website sebagai software pembelajarannya. Dengan pemanfaatan e-learning pada STIKES Pembina Prodi Kebidanan sebagai sarana pembelajaran diharapkan kualitas pembelajaran dan hasil belajar diharapkan akan semakin baik. Metodologi yang digunakan penulis adalah menggunakan Rational Unified Process (RUP). Yang terdiri dari inception, elaboration, contruction, dan transition. Metode perancangan sistem menggunakan PHP dan untuk database menggunakan MySQL, pembuatan dengan 4 diagram yaitu class diagram, use case, activity diagram, sequense diagram. Aplikasi ini dapat membantu dosen dan mahasiswa dalam proses pembelajaran, dan dapat mempermudah STIKES Pembina dalam menyampaikan informasi kepada mahasisw

Reassessing the approach to informed consent: The case of unrelated hematopoietic stem cell transplantation in adult thalassemia patients

Introduction: The informed consent process is the legal embodiment of the fundamental right of the individual to make decisions affecting his or her health., and the patient's permission is a crucial form of respect of freedom and dignity, it becomes extremely important to enhance the patient's understanding and recall of the information given by the physician. This statement acquires additional weight when the medical treatment proposed can potentially be detrimental or even fatal. This is the case of thalassemia patients pertaining to class 3 of the Pesaro classification where Allogenic hematopoietic stem cell transplantation (HSCT) remains the only potentially curative treatment. Unfortunately, this kind of intervention is burdened by an elevated transplantation-related mortality risk (TRM: all deaths considered related to transplantation), equal to 30% according to published reports. In thalassemia, the role of the patient in the informed consent process leading up to HSCT has not been fully investigated. This study investigated the hypothesis that information provided by physicians in the medical scenario of HSCT is not fully understood by patients and that misunderstanding and communication biases may affect the clinical decision-making process.Methods: A questionnaire was either mailed or given personally to 25 patients. A second questionnaire was administered to the 12 physicians attending the patients enrolled in this study. Descriptive statistics were used to evaluate the communication factors.Results: The results pointed out the difference between the risks communicated by physicians and the risks perceived by patients. Besides the study highlighted the mortality risk considered to be acceptable by patients and that considered to be acceptable by physicians.Conclusions: Several solutions have been suggested to reduce the gap between communicated and perceived data. A multi-disciplinary approach may possibly help to attenuate some aspects of communication bias. Several tools have also been proposed to fill or to attenuate the gap between communicated and perceived data. But the most important tool is the ability of the physician to comprehend the right place of conscious consent in the relationship with the patient

Burnout among surgeons before and during the SARS-CoV-2 pandemic: an international survey

Background: SARS-CoV-2 pandemic has had many significant impacts within the surgical realm, and surgeons have been obligated to reconsider almost every aspect of daily clinical practice. Methods: This is a cross-sectional study reported in compliance with the CHERRIES guidelines and conducted through an online platform from June 14th to July 15th, 2020. The primary outcome was the burden of burnout during the pandemic indicated by the validated Shirom-Melamed Burnout Measure. Results: Nine hundred fifty-four surgeons completed the survey. The median length of practice was 10 years; 78.2% included were male with a median age of 37 years old, 39.5% were consultants, 68.9% were general surgeons, and 55.7% were affiliated with an academic institution. Overall, there was a significant increase in the mean burnout score during the pandemic; longer years of practice and older age were significantly associated with less burnout. There were significant reductions in the median number of outpatient visits, operated cases, on-call hours, emergency visits, and research work, so, 48.2% of respondents felt that the training resources were insufficient. The majority (81.3%) of respondents reported that their hospitals were included in the management of COVID-19, 66.5% felt their roles had been minimized; 41% were asked to assist in non-surgical medical practices, and 37.6% of respondents were included in COVID-19 management. Conclusions: There was a significant burnout among trainees. Almost all aspects of clinical and research activities were affected with a significant reduction in the volume of research, outpatient clinic visits, surgical procedures, on-call hours, and emergency cases hindering the training. Trial registration: The study was registered on clicaltrials.gov "NCT04433286" on 16/06/2020

The third dredge up in low- and intermediate-mass stars: sensitivity to mixing treatments and evolutionary effects.

The thesis deals with the advanced evolution of low- and intermediate-mass stars (Mi < 8 Msun), with particular focus on the TP-AGB phase, when thermal pulses periodically take place in the interiors while strong stellar winds progressively erode the external mantle. This study, based on the MESA stellar evolution code, aims to investigate the effects of the third dredge up on the surface properties, i.e. chemical composition, effective temperature, and opacity. Different overshooting schemes and mass loss prescriptions were explored. At the same time, I tested the performance and characteristics of the code, a preliminary but necessary step for possible future developments of the research

Full 3D Modelling of Scenes with Complex Surface Reflectance

Many industrial fields such as digital entertainment and heritage preservation make use of 3D reconstruction techniques to produce digital copies of objects from the real world. From the advent of 3D computer vision, researchers have been exploring a broad variety of approaches to infer scene geometry from visual input, tackling increasingly more complex classes of objects while improving the modelling accuracy. To date, however, many of these techniques still operate under simplifying assumptions on the reconstructed scene surface reflectance, effectively restricting the range of objects that can be correctly reconstructed. Helmholtz Stereopsis is a technique that allows to perform 3D reconstruction regardless of the surface reflectance of the target object. The technique exploits a principle from Physics called Helmholtz reciprocity, which describes the reversibility of light transport paths. Despite the advantages this brings, most Helmholtz Stereopsis formulations to date have been limited to 2.5D reconstruction, and the few exceptions do not achieve global optimality guarantees in the full 3D domain. To address this gap, there is a need for better scene modelling techniques that are not only agnostic to surface reflectance but capable of achieving a full 3D reconstruction.The main contribution of this work is the introduction of a family of full 3D Helmholtz Stereopsis approaches. The contributed methods are divided in view-dependent and full 3D approaches. The view-dependent formulations consist in producing multiple 2.5D surfaces obtained from different view-points around the object. The full 3D techniques are instead divided in a volumetric formulation, which estimates the target surface occupancy in a voxel grid, and a mesh-based formulation, which optimises the vertices position of an initialisation topology. Additional methods are presented to perform segmentation in Helmholtz datasets and to handle visibility where incomplete geometric data is available. All presented approaches are evaluated on both synthetic and real datasets, including novel datasets contributed as part of this research.The first mobile Helmholtz Stereopsis capture setup is also introduced in this work, consisting of two cameras equipped with external flashes. The setup is used to produce the aforementioned datasets, which are utilised in the evaluation section of each methodology presented and could be adopted in the future to benchmark new Helmholtz Stereopsis formulations. An extensive analysis is also carried out to understand how the cameras position in a Helmholtz setup influences the reconstruction outcome and modelling accuracy. In particular, so called degenerate configurations are studied and the results obtained are leveraged to maximise the reconstruction outcome of Helmholtz Stereopsis setups and to improve the fusion process in the view-dependent approaches

Reti di reazioni nucleari in stelle di elio

Le reazioni termonucleari determinano sensibilmente la struttura e la stabilità delle stelle. Lo scopo di questa tesi è quello di costruire e descrivere un modello semplificato per una particolare rete di reazioni che avvengono, se le condizioni lo permettono, in stelle post sequenza principale. La rete di reazioni in esame comprende il processo tre alfa e la cattura di nuclei di elio-4 da parte di nuclei alfa coniugati come il carbonio, l'ossigeno e il neon. A tal fine si introdurranno concetti di astrofisica nucleare e si risolverà numericamente il sistema di equazioni differenziali che descrive la rete di reazioni. Infine si analizzeranno le composizioni finali al variare dei parametri caratteristici (temperatura e densità) e confrontandosi con alcuni dati osservativi si potrà discutere l'esistenza di stelle con tali caratteristiche, fornendo un utile punto di partenza per ulteriori investigazioni

A Semi-empirical approach for the modelling and analysis of microvibration sources on-board spacecraft.

The term microvibrations generally refers to accelerations in the order of micro-gs and which manifest in a bandwidth from a few Hz up to say 500-1000 Hz. The need to accurately characterise this small disturbances acting on-board modern satellites, thus allowing the design of dedicated minimisation and control systems, is nowadays a major concern for the success of some space missions. The main issues related to microvibrations are the feasibility to analytically describe the microvibration sources using a series of analysis tools and test experiments and the prediction of how the dynamics of the microvibration sources couple with those of the satellite structure. In this thesis, a methodology to facilitate the modelling of these phenomena is described. Two aspects are investigated: the characterisation of the microvibration sources with a semi-empirical procedure which allows derivation of the dynamic mass properties of the source, also including the gyroscopic effect, with a significantly simpler test configuration and lower computational effort compared to traditional approaches; and the modelling of the coupled dynamics when the source is mounted on a representative supporting structure of a spacecraft, including the passive and active effects of the source, which allows prediction of the structure response at any location. The methodology has been defined conducting an extensive study, both experimental and numerical, on a reaction wheel assembly, as this is usually identified as the main contributory factor among all microvibration sources. The contributions to the state-of-the-art made during this work include: i) the development of a cantilever configured reaction wheel analytical model able to reproduce all the configurations in which the mechanism may operate and inclusive of the gyroscopic effect; ii) the reformulation of the coupling theory which allows retrieving the dynamic mass of a microvibration source over a wide range of frequencies and speeds, by means of the experimental data obtained from measurements of the forces generated when the source is rigidly secured on a dynamometric platform and measurements of the accelerations at the source mounting interface in a freefree suspended boundary condition; iii) a practical example of coupling between a reaction wheel and a honeycomb structural panel, where the coupled loads and the panel response have been estimated using the mathematical model and compared with test results, obtained during the physical microvibration testing of the structural panel, showing a good level of agreement when the gyroscopic effect is also taken into account

Dynamic Mass of a Reaction Wheel Including Gyroscopic Effects: an Experimental Approach

In recent years, driven by the increasingly stringent stability requirements imposed by some satellites’ payloads (e.g., the new generation of optical instruments), the issue of accurate onboard spacecraft microvibration modeling has attracted significant interest from engineers and scientists. This paper investigates the microvibration-induced phenomenon on a cantilever-configured reaction wheel assembly including sub- and higher harmonic amplifications due to modal resonances and broadband noise. A mathematical model of the reaction wheel assembly is developed and validated against experimental test results. The model is capable of representing each configuration in which the reaction wheel assembly will operate, whether it is hard mounted on a dynamometric platform or suspended free–free. The outcomes of this analysis are used to establish a novel methodology to retrieve the dynamic mass of the reaction wheel assembly in its operative range of speeds. An alternative measurement procedure has been developed for this purpose, showing to produce good estimates over a wide range of frequencies using a less complex test campaign compared with typical dynamic mass setups. Furthermore, the gyroscopic effect influence in the reaction wheel assembly response is thoroughly examined both analytically and experimentally. Finally, to what extent the noise affects the convergence of the novel approach is investigated

Role of Ablation Technologies in Locally Advanced Pancreatic Cancer

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