Clinical review: Liberation from mechanical ventilation

Mechanical ventilation is the defining event of intensive care unit (ICU) management. Although it is a life saving intervention in patients with acute respiratory failure and other disease entities, a major goal of critical care clinicians should be to liberate patients from mechanical ventilation as early as possible to avoid the multitude of complications and risks associated with prolonged unnecessary mechanical ventilation, including ventilator induced lung injury, ventilator associated pneumonia, increased length of ICU and hospital stay, and increased cost of care delivery. This review highlights the recent developments in assessing and testing for readiness of liberation from mechanical ventilation, the etiology of weaning failure, the value of weaning protocols, and a simple practical approach for liberation from mechanical ventilation

IMPLICATIONS OF SOCIAL MEDIA NETWORKS TECHNOLOGY IN INTERPERSONAL SKILLS AND ACADEMIC PERFORMANCES

Purpose Social media has transformed and influenced communication, research and education in general through the vast variety of online tools which are available for communication.The objectives of the research study is to examine and analyze the influence of Social Media on the academic Performance of students and their social interpersonal skills. Design/methodology/approach 195 samples were collected from full-time undergraduate students studying in the University from different faculties including business, engineering, law, English Studies and Language Studies. The descriptive statistics analysis was used to analyze the demographic data while inferential statistics was used in testing the research hypotheses. The results obtained from the analyses were used to interpret the outcomes. Findings The empirical results reveal that the students get to learn through social media differently enabling them new information and are also able to communicate easily with others. The communication exchanged is irrelevant to studies and does not help them in any manner to improve their learning. It is confirmed that the Social Media effects do not support the Learning of the students and most of the students are addicted to social media. Practical Implications The study confirms that it is good means to approach the students through social media whichmight boost the education in an easier way. Originality/value The research work is of its first kind as it focuses on the impact of social media on the academic performances of the students studying in Higher Educational Institutions.&nbsp

Measuring the Performance of the Kuwaiti Banking Sector Before and After the Recent Financial Crisis

The objective of this research is to investigate the determinants of the performance of the Kuwaiti banking sector before and after the recent financial crisis over the period of 2006-2012. The data utilized is based on the yearly financial statements of the Kuwaiti banks that are listed on Kuwait Stock Exchange over the same period. There are several methods have been used to identify the determinants which impact the performance of the banking sector. In this research, a ratio analysis technique is considered efficient and more reliable method than other approaches. Other factors such as trend, government regulations and other economic factors are also included. The study found that the overall banking sector performance increased considerably in the first two years of the analysis. A significant change in trend is noticed at the onset of the global financial crisis in September 2008, reaching its peak before the global financial crisis. This resulted in decreasing the profitability, return on equity, assets and capital. Keywords: Banking Sector, Financial Performance, Financial ratios, Interest Spread Rate, Kuwait Stock Exchange (KSE), Growth Ratios, Financial Crisis

A New Extract from Pomegranate (Punica granatum L.) By-Products as a Potential Oenological Tannin: Preliminary Characterization and Comparison with Existing Commercial Products

Oenotannins are nowadays widely used as co-adjuvant in the winemaking process. The increasing cultivation and consumption of pomegranate (Punica granatum L.) leads to high amounts of by-products, mainly peels. Aim of this study was to propose a dried tannin-rich extract from pomegranate by-products as a new oenotannin. A decoction was prepared from mesocarp of the Wonderful pomegranate variety only using hot water as extracting solvent. The dried decoction was physical-chemically characterized and compared to 7 existing commercial oenotannins from different botanical origin (grape seed, oak, gallnut), according to UV-Vis Spectroscopy, Colorimetric analysis (CIELab), gelatin index, reactivity to proteins, HPLC-DAD, DPPH, and Total Polyphenols content by both Folin-Ciocalteu and the International Organization of Vine and Wine (OIV) methods. Data showed the lowest antiradical (AR) and total polyphenolic content (TPC) for the pomegranate tannin but also the highest AR/TPC ratio suggesting a good radical scavenging potential of this new tannin. Pomegranate tannin showed high reactivity with proteins, a unique chromatographic profile, and a low color impact. The new pomegranate tannin showed an interesting potential for oenological applications in particular for reducing the use of sulfites during vinification and for the white wine stabilization

Assessment of Groundwater Pollution with Heavy Metals in North West Bank/Palestine by ICP-MS

Groundwater of North West Bank in Palestine was assessed for pollution with trace metals by ICP/MS. The samples were analysed for their pH, electrical conductivity, total dissolved solids, and different trace metals content. The pH, electrical conductivity, and total dissolved solids of all water samples were found to be within the US Environmental protection Agency limits. Results showed that the concentration of nine trace metals (Cr, Mn, Ni, Cu, Zn, Mo, Pb, Cd, and Al) is within the WHO limits in drinking water (50, 500, 20, 2000, 3000, 70, 10, 3, and 200 ug/L, respectively), however six metals of them (Cr, Mn, Ni, Cu, Mo, and Al) were detected in 100% of the samples, while Pb, Cd, and Zn were detected in 80%, 60%, and 20% of the samples, respectively. On the other hand, Tl which is a very toxic heavy metal with allowed WHO limits of 0.01 - 1 ug/L is detected in 100% of the water samples analysed with a range of 0.02 - 0.12 ug/L. It indicates that such concentration levels of Tl would be harmful to the human being drinking the water. In general, 82% of all samples analysed contained one or more of the 12 metals studied each in varying concentration. Results of this study suggest a possible risk to the people of the study area given the toxicity of heavy metals, and the fact that for many people in the study area, groundwater is a main source of their water supply.The authors thank the German Research Foundation (Deutsche Forschungsgemeinschaft), DFG for their financial support through TRION project

Fuel cell membranes – Pros and cons

This investigation provides a critical analysis of the development of PEM fuel cells and related research with specific focus on the membrane material. The catalytic membrane is the most important component of the PEMFC giving rise to the need for the use of efficient, durable and cheap material to reduce the overall cost of the fuel cell. In this work, the need for materials other than Nafion to be used as PEM membranes is established and a case for the use of composite membranes material in fuel cells is made. Composite membranes increase the cell voltage by up to 11% even at high cell operating temperature of 95°C. They also increase the overall performance of the cell by up to 17% when dry hydrogen is utilised. Non-fluorinated membranes are also suitable for use in fuel cells for portable applications but they are very expensive and less conductive. Partially fluorinated membranes have good mechanical stability but expensive. The fluorinated membrane has high stability under oxidation and reduction conditions. Unfortunately, they only reach their optimum performance at temperatures below 100°C which makes them of limited use in PEM fuel cells application at higher temperatures

Evaluating the Effect of Metal Bipolar Plate Coating on the Performance of Proton Exchange Membrane Fuel Cells

Environmental concerns of greenhouse gases (GHG) effect from fossil commodities and the fast increase in global energy demand have created awareness on the need to replace fossil fuels with other sources of clean energy. PEM fuel cell (PEMFC) is a promising source of energy to replace fossil fuels. The commercialization of the cell depends on its price, weight and mechanical strength. Bipolar plates are among the main components of PEMFC which perform some significant functions in the fuel cell stack. Metal bipolar plate is considered by the research community as the future material for fuel cells. However, surface coating is required for metals to enhance its corrosion resistance, hydrophilicity and interfacial contact resistance (ICR) in PEM fuel cells. Open pore cellular metal foam (OPCMF) materials have been used to replace the conventional flow field channel in recent times due to its low electrical resistance, high specific area and high porosity; however, it endures the same corrosion problem as the metallic bipolar plate. This investigation offers an overview on different types of bipolar plates and techniques in coating metallic bipolar platse and open pore metal foam as flow field channel materials to improve the corrosion resistance which will eventually increase the efficiency of the fuel cell appreciably