Treating the full humanity of our patients by acknowledging our limitations

A reflection on a clinical experience with a severely anemic Jehovah\u27s Witness Patient who refused blood transfusion

The investigation of a segment multi-chamber oscillating water column in physical scale model

© 2016 IEEE. Wave Energy Converters (WECs) are being developed as a viable green energy solution to meet power needs for coastal communities. This paper presents the initial work on a fixed multi-chamber OWC (MCOWC) concept. The paper reports theoretical and experimental modeling. It begins with initial tests to verify the simple idealized model of a fixed OWC multi-chamber concept. These take place under small-amplitude regular-wave wave tank conditions. The analysis is carried through to assess the effect of the Capture Width (Hydrodynamic efficiency). Experimental data is put forward from the mounting of level sensors and anemometers to test the hydrodynamic performance of a fixed MCOWC at different wave periods. The orifice effects of the chamber on the relative amplitudes of the inner free water surface and air flow rate in the duct are investigated. The experimental results will be used as real case data in order to optimize the orifice area and to maximize the chamber power according to the air flow velocity above the water surface inside the chambers

ADAPTASI SOSIAL KELUARGA NELAYAN PASCA ABRASI PANTAI JILBAB DI GAMPONG PANTAI PERAK ACEH BARAT DAYA TAHUN 2021

Penelitian ini mengkaji tentang adaptasi pengungsi dalam penyesuaian dirinya dilingkungan yang baru, karena perbedaan kebiasaan dan budaya dengan masyarakat lokal. Hal ini menjadi landasan bagi peneliti untuk melihat bagaimana gambaran adaptasi sosial keluarga nelayan pasca abrasi pantai. Tujuan dari penelitian ini adalah melihat bagaimana gambaran adaptasi sosial keluarga nelayan pasca abrasi pantai, kemudian apasaja hambatan dalam penyesuaian dirinya. Peneliti menggunakan  teori AGIL (Adaptation Goal Attainment Integration Latency) oleh Talcott Parsons. Dalam penelitian ini penulis menggunakan metode penelitian Kualitatif. Teknik pengumpulan data yang dilakukan dengan cara observasi, wawancara, dan dokumentasi. Hasil penelitian ini menjelaskan gambaran adaptasi sosial keluarga nelayan pasca abrasi sesuai dengan teori AGIL, masyarakat menyesuaikan diri melalui interaksi dengan 1). Bertegur sapa, menanyakan kabar, 2). Berpartisipasi dikegiatan kenduri hidup maupun mati dan 3). Ikut melakukan kegiatan sosial gotong royong.Masyarakat mempunyai tujuan untuk hidup berdampingan secara harmonis, dan masyarakat pendatang mampu menghargai perbedaan yang ada didalam lingkungannya. Kendala atau hambatan dalam adaptasi sosial keluarga nelayan pasca abrasi pantai ini diantaranya 1). Perbedaan logat bahasa dan 2). Perbedaan kebiasaan dari lingkungan sebelumnya dilingkungan yang baru

Experimental and numerical study of a fixed multi-chamber oscillating water column device (MC-OWC)

University of Technology Sydney. Faculty of Engineering and Information Technology.This thesis focuses on preliminary investigating the hydrodynamic performance of a fixed Multi–Chamber OWC (MC–OWC) wave energy converter, which consists of a linear array of four OWC chambers aligned in the same direction of the incident wave propagation. These investigations address the gaps found in previous works by putting forward detailed explanations of the effect of wave height, wave period, device draught and power take–off (PTO) damping on MC–OWC device performance using a combined numerical and experimental approach. The research methodology was based on two series of experimental sessions and two numerical models. The first experimental campaign was conducted in a small wave flume in the University of Technology Sydney (UTS) for a MC–OWC device at a model–scale of 1:25. This experiment was performed mainly to validate the numerical models and initially observe device response when subjected to limited regular wave conditions. The second experimental session was carried out in the wave flume at the Manly Hydraulic Laboratory (MHL) in New South Wales, Australia for a MC–OWC devices at a model–scale of 1:16. This experiment was designed to 1) assess the device performance over a wide range of regular and irregular wave conditions, 2) study the impact of wave height, wave period and device draught on the performance of a MC–OWC device, and 3) investigate the effect of the pneumatic damping induced by the power take–off (PTO) system on device performance. The first validated numerical model was a MATLAB time–domain model that was based on a coupling between the rigid piston model and the thermodynamic forces on a MC–OWC device to get a preliminary understanding of device performance. The second numerical model was a fully nonlinear 3D Computational Fluid Dynamics (CFD) model that was constructed using the commercial code STAR–CCM+. After being validated in good agreement against the physical scale model tests, the CFD model was utilised to study the influence of the power take–off (PTO) damping on the water surface elevation inside the chamber, the differential air pressure, the airflow rate and the device capture width ratio under different incident regular wave conditions. The extensive analysis of 198 physical tests and 84 CFD simulations revealed that the water surface elevation, differential air pressure, and airflow rate had a similar response in all chambers to the wave conditions, device draught and PTO damping. However, the first chamber always played the primary role in wave energy extraction, and the performance gradually decreased down to the fourth chamber where the lowest performance was found. The maximum capture width ratio of the whole MC–OWC device was found to be 2.1 under regular wave conditions and 0.95 under irregular wave conditions. These ratios were the highest among all similar concepts that have been reported in previous research

Statistical Analysis of Wind Speed Distribution Based on Five Weibull Methods for Wind Power Evaluation in Maan, Jordan

Due to the increasing environmental and economic cost of fossil fuels, alternative sources of energy are needed. One of these sources is wind energy. The wind-turbines extract kinetic energy from the wind to convert it to mechanical energy and then transfer to electrical energy. Wind speed is the most important parameter for an efficient wind energy system. In this work the Microsoft excel software used to analysis of wind speed data and evaluate the wind speed distribution. the wind speed probability estimated and analyzed by using five methods of Weibull and Rayleigh distributions and evaluated the best methods to represent the actual data based on monthly mean wind speed data of the Ma'an city site, Jordan. furthermore, from the analysis, it has been found that the energy pattern factor method EPFM is the best method to represent the actual data and the EPFM is the best and most accurate and efficient method to determine the Weibull distribution parameters (k) and (c). In addition, in this work, the annual average shape parameter (k) is 3.4 and the annual average scale parameter (c) is 4.0 m/s. The most probable wind speed is 4.4 m/s in August and the maximum wind speed carrying maximum energy is 5.2 m/s occurs in October. Meanwhile, the maximum power and energy density are 57.5 W/m2, 42.8 kWh/m2 respectively in August. Moreover, the site has annual power density 39.3W/m2 and 345.5 kWh/m2 of energy density. Keywords: Renewable energy, Wind energy, Wind speed, Weibull distributions, Power density, Energy density DOI: 10.7176/JETP/11-4-05 Publication date:September 30th 202

Enhancement of the Injection Grade Polypropylene using Extrusion Grade Polypropylene and Calcium Carbonate

the invention provides for study properties of polypropylene (injection grade) / polypropylene (extrusion grade) blend filled with calcium carbonates. In four formulations of PP(Injection grade)/PP(Extrusion grade)) viz. 95/5, 90/10, 85/15 and 80/20 in ratio of weight percentage were prepared for injection molding machine. This PP(Injection grade)/PP(Extrusion grade) (80/20) blend was selected and investigated at different three fractions of calcium carbonate. The mechanical properties such as tensile strength and elongation test were investigated. The rheological properties such as melt flow index (MFI) and melt density were evaluated. The results indicated that incorporate calcium carbonate increase the (MFI), melt density and elongation decreased while increase the tensile strength. It was obtained that increase calcium carbonate content into PP(Injection grade)/PP(Extrusion grade) blends will increase the density. Taking into consideration, it was concluded that, the optimum composition provided the good mechanical, rheological properties and density is PP(Injection grade)/PP(Extrusion grade)/Calcium carbonate (80/20/22.5) wt%

Experimental Investigation of the Small-scale Fixed Multi-chamber OWC Device

Sea wave energy generators or converters (WECs) have the potential to become a viable technology for clean, renewable energy production. Among the WEC technologies, the oscillating water columns (OWCs) are the most common WEC devices studied. These have been studied and developed over many years. Multi-chamber oscillating water columns (MC-OWC) have the potential to have a higher energy conversion when extracting energy in mixed sea states than single-chamber devices. In the work reported in this paper, physical experiments are carried under regular wave conditions to test the wave power extraction of a fixed MC-OWC small-scale model. The Power Take-Off (PTO) of the device is simulated using orifice plates. The flow characteristics through these orifices are pre-calibrated such that the extracted power can be obtained only using the pressure measurement. Wave condition effects on the damping of the PTO of the device power extraction are addressed. The test results illustrate that the PTO system damping is critical and affects device performance

PATOLOGíA ORAL EN NIÑoS CON ANEMIA ApLÁSICA

El presente trabajo de investigación tuvocomo objetivo identificar las diferentesPatologías Orales de tipo ulcerativo, micótieo.hemorrágico e inflamatorio, presentesen la cavidad oral de pacientes con AnemiaAplásica. La población estuvo conformadapor 36 pacientes que acudieron aconsulta externa durante los meses demarzo a mayo del año 2003 en el Serviciode Hematología Clínica del Instituto deSalud del Ni/jo (ISN)

Perception of Health Teams on the Implementation of Strategies to Decrease Nursing Errors and Enhance Patient Safety

DaifAllah D AlThubaity,1 Abeer Y Mahdy Shalby2 1Pediatric Nursing Department, Faculty of Nursing, Najran University, Najran, 66441, Saudi Arabia; 2Medical-Surgical Nursing Department, Faculty of Nursing, Najran University, Najran, 66441, Saudi ArabiaCorrespondence: DaifAllah D AlThubaity, Email [email protected]: Patient care is a public health issue all over the world, with nursing errors in hospitals being a significant source of harm to patients and a hindrance to the healthcare system’s efficiency.Purpose: The purpose of this study was to investigate health teams’ perceptions of strategies used to reduce nursing error that affects patient safety.Patients and Methods: A descriptive study was conducted from January to March 2022 at Najran University Hospital and KKH to better understand the issue. The study included 400 healthcare team members, including nurses, physicians, nurse aides, health workers, and others. The data was collected through the analysis of the health team’s characteristics, nursing errors, and strategies for error reduction.Results: The results of the study led to the development of five strategies and 28 interventions aimed at reducing nursing errors. The study revealed that two-thirds of the participants had a high perception of strategies for reducing nursing errors, while one-third had a low perception.Conclusion: The study highlights the importance of addressing nursing errors in the healthcare system and provides evidence-based strategies and interventions to reduce them. The findings emphasize the need for ongoing efforts to enhance the perception and understanding of healthcare professionals in reducing errors and improving patient care.Keywords: health teams, perception, strategies, nursing error, patient safet

Multi–chamber oscillating water column wave energy converters and air turbines: A review

© 2018 John Wiley & Sons, Ltd. The oscillating water column (OWC) is a more common type of wave energy converter (WEC) that has been the subject of the study and development for several decades. Multi–chamber oscillating water column (MC–OWC) devices or arrays have the advantage of being more efficient in energy extraction compared to a single chamber system, particularly in more chaotic sea states. A variety of single and array OWC devices have been proposed and studied on a small–scale, whereas few large–scale devices have been tested under ocean wave conditions. This paper provides a concise review of the current state of MC–OWC device development in laboratory conditions. The review highlights explicitly the main stages of MC–OWC device development for one ongoing study as an example. This review was based on the available information in the literature from 2003 to 2012, in addition, further work is presented as part of the current study at the University of Technology Sydney. This study is from 2015 to 2018. The discussion shows the challenges that a device needs to overcome to be more competitive with other WECs in the global of wave energy converter area