140 research outputs found
Life in a clinical diploma course
No full textThis paper focuses on the author’s experience of a Clinical Diploma programme. The author is a Maori woman who is in her second year of a three year post-graduate Clinical Diploma programme. The paper includes comment on the cultural focus of content, culture conflicts and areas where the programme might be improved for Maori students
The Effectiveness of Virtual R&D Teams in SMEs: Experiences of Malaysian SMEs
No full textThe number of small and medium enterprises (SMEs), especially those involved with research and development (R&D) programs and employed virtual teams to create the greatest competitive advantage from limited labor are increasing. Global and localized virtual R&D teams are believed to have a high potential for SMEs growth. Due to the fast growing complexity of the new product, coupled with new emerging opportunities of virtual teams, a collaborative approach is believed to be the future trend. This research explores the effectiveness of virtuality in SMEs virtual R&D teams. An online questionnaire emailed to Malaysian manufacturing SMEs and 74 usable questionnaires were received, representing a 20.8 percent return rate. To avoid the bias that may result from pre-suggested answer, a series of open-ended questions asked from expertise. This study based on analyzing an open-ended question; extract four main themes among expertise recommendations on the effectiveness of virtual teams for SMEs growth and performance. These are suitable for SMEs new product design manager to realize the key advantage and importance of virtual R&D teams in the process of NPD, which lead to increase the effectiveness of the new product's procedure.Virtual teams, New product development, Survey finding, Small and medium Enterprises.
Employing Hot-Melt Extrusion Technology to Enhance the Solubility of Cannabidiol (CBD)
No full textCorresponding author (Pharmaceutics and Drug Delivery): Iman Taha, [email protected]://egrove.olemiss.edu/pharm_annual_posters_2022/1020/thumbnail.jp
Photochemical oxidation of short-chain polychlorinated n-alkane mixtures using H2O2/UV and the photo-Fenton reaction.
No full textThe photochem. oxidn. of short-chain polychlorinated n-alkane (PCA) mixts. were studied using H2O2/UV and modified photo-Fenton conditions (Fe3+/H2O2/UV) in both Milli-Q and lake water. All PCA mixts., including chlorinated (Cl5 to Cl8) decanes, undecanes, dodecanes and tridecanes degraded in 0.02M H2O2/UV at pH 2.8 in pure water, with 80 ± 4% disappearance after 3 h of irradn. using a 300. nm light source. Degrdn. was somewhat enhanced under similar conditions but in natural water. The modified photo-Fenton system was more effective in degrading PCAs, with 72% and 80% disappearance of chlorinated decanes in 4 S min of irradn. in pure and natural water, resp. Carbon chain-length had minimal effect on degrdn. rates; however, increased degree of chlorination (from Cl5 to Cl8) resulted in slower initial degrdn. rates and less complete conversion after 3 h of irradn. Three hours of irradn. in natural water/H2O2/UV resulted in 95% degrdn. of parent PCAs accompanied by 93% release of chloride ion. Quant. dechlorination, which may be indicative of complete mineralization, suggests that this is an effective water remediation technique for PCAs
A Quasi-Feed-In-Tariff policy formulation in micro-grids: A bi-level multi-period approach
No full textA Quasi-Feed-In-Tariff (QFIT) policy formulation is presented for micro-grids that integrates renewable energy generation considering Policy Makers' and Generation Companies' (GENCOs) objectives assuming a bi-level multi-period formulation that integrates physical characteristics of the power-grid. The upper-level problem corresponds to the PM, whereas the lower-level decisions are made by GENCOs. We consider that some GENCOs are green energy producers, while others are black energy producers. Policy makers incentivize green energy producers to generate energy through the payment of optimal time-varying subsidy price. The policy maker's main objective is to maximize an overall social welfare that includes factors such as demand surplus, energy cost, renewable energy subsidy price, and environmental standards. The lower-level problem corresponding to the GENCOs is based on maximizing the players' profits. The proposed QFIT policy differs from the FIT policy in the sense that the subsidy price-based contracts offered to green energy producers dynamically change over time, depending on the physical properties of the grid, demand, and energy price fluctuations. The integrated problem solves for time-varying subsidy price and equilibrium energy quantities that optimize the system welfare under different grid and system conditions. © 2014 Elsevier Ltd.Benedict E., 1992, TECHNICAL REPORT; Christie RD, 2000, P IEEE, V88, P170, DOI 10.1109-5.823997; Couture T., 2009, NRELTP6A245551; Couture T., 2010, NRELTP6A244849; Duan B., 2010, 2010 3 IEEE INT C CO, V9, P188; Ferris M.C., 1997, P APPL MATH SERIES S; Gabriel S. A., 2012, COMPLEMENTARITY MODE; Gan L., 2013, DEC CONTR CDC 2013 I, P5614; Han LS, 2013, OPER RES LETT, V41, P92, DOI 10.1016-j.orl.2012.11.006; Hawthorne B. D., 2012, ASME INT DES ENG TEC; Hobbs BF, 2001, IEEE T POWER SYST, V16, P194, DOI 10.1109-59.918286; Huang D., 2011, THESIS DELFT U TECHN; Kirschen D. S., 2004, FUNDAMENTALS POWER S; Masters G. M., 2004, RENEWABLE EFFICIENT; Murty K.G., 1997, SIGMA SERIES APPL MA; National Grid, 2013, 2013 STAND EL SERV L; Newbery DM, 1998, RAND J ECON, V29, P726, DOI 10.2307-2556091; Osborne M. J., 1994, COURSE GAME THEORY; Pieper H., 2001, THESIS STANFORD U; PJM, 2010, TECHNICAL REPORT; Poputoaia D., 2008, EUROPEAN EXPERIENCE; Roozbehani M., 2011, 50 IEEE C DEC CONTR; Sumbera J., 2011, TECHNICAL REPORT; Taha A.F., 2013, BUILD RES COLL EL SY; Taha A.F., 2013, IEEE T SYSTEMS MAN C; Tamas MM, 2010, ENERG POLICY, V38, P4040, DOI 10.1016-j.enpol.2010.03.028; Weisenmiller R., 2012, CEC3002012002CMF0
Allocation of service time in a multiserver system
No full textReducing congestion is a primary concern in the design and analysis of queueing networks, especially in systems where sources of randomness are characterized by high variability. This paper considers a multiserver first-come, first-served (FCFS) queueing model where we arrange servers in two stations in series. All arrivals join the first service center, where they receive a maximum of T units of service. Arrivals with service requirements that exceed the threshold T join the second queue, where they receive their remaining service. For a variety of heavy tail service time distributions, characterized by large coefficient of variations, analytical and numerical comparisons show that our scheme provides better system performance than the standard parallel multiserver model in the sense of reducing the mean delay per customer in heavy traffic systems. Our model is likely to be useful in systems where high variability is a cause for degradation and where numerous service interruptions are not desired. © 2006 INFORMS.Abboud NE, 1996, J OPER RES SOC, V47, P284; Abboud NE, 1997, OPER RES, V45, P577, DOI 10.1287-opre.45.4.577; Buzacott JA, 1996, MANAGE SCI, V42, P768, DOI 10.1287-mnsc.42.5.768; Cooper R.B., 1981, INTRO QUEUEING THEOR; Cosmetatos G. P., 1975, INFOR. Canadian Journal of Operational Research and Information Processing, V13; Disney R. L., 1987, TRAFFIC PROCESSES QU; El-Taha M, 2003, COMPUT OPER RES, V30, P683, DOI 10.1016-S0305-0548(02)00033-3; Fischer M. J., 2001, Proceeding of the 2001 Winter Simulation Conference (Cat. No.01CH37304), DOI 10.1109-WSC.2001.977327; Gross D., 1998, FUNDAMENTALS QUEUEIN; Harchol-Balter M, 1999, J PARALLEL DISTR COM, V59, P204, DOI 10.1006-jpdc.1999.1577; HarcholBalter M, 1997, ACM T COMPUT SYST, V15, P253, DOI 10.1145-263326.263344; Harchol-Balter M, 2002, J ACM, V49, P260, DOI 10.1145-506147.506154; HOKSTAD P, 1978, OPER RES, V26, P510, DOI 10.1287-opre.26.3.510; KIEFER J, 1956, ANN MATH STAT, V27, P147, DOI 10.1214-aoms-1177728354; KIMURA T, 1986, MANAGE SCI, V32, P751, DOI 10.1287-mnsc.32.6.751; KRAMER W, 1976, P 8 INT TEL C MELB A; Law A., 1991, SIMULATION MODELING; MA BNW, 1995, OPER RES, V43, P158, DOI 10.1287-opre.43.1.158; MADDAH B, 2004, ALLOCATION PROCESSIN; Mandelbaum A, 1998, MANAGE SCI, V44, P971, DOI 10.1287-mnsc.44.7.971; MARCHAL WG, 1978, OPER RES, V26, P1083, DOI 10.1287-opre.26.6.1083; Medhi J., 1991, STOCHASTIC MODELS QU; *MESQ SOFTW INC, 1998, CSIM 18 US GUID; Nozaki S., 1978, J APPL PROBAB, V13, P826; Ross SM, 1997, INTRO PROBABILITY MO; SchellerWolf A, 1997, QUEUEING SYST, V25, P77; SchellerWolf A, 1997, QUEUEING SYST, V26, P169; Tijms H. C., 1994, STOCHASTIC MODELS AL; TIJMS HC, 1981, ADV APPL PROBAB, V13, P186, DOI 10.2307-1426474; UTHAISOMBUT P, 2000, THESIS MICHIAGAN STA; WHITLEY RJ, 1982, J PEDIATR, V1, P125; WHITT W, 1989, MANAGE SCI, V35, P1341, DOI 10.1287-mnsc.35.11.1341; WHITT W, 1981, MANAGE SCI, V27, P619, DOI 10.1287-mnsc.27.6.619; WHITT W, 1983, ATandT TECH J, V62, P2779; Whitt W, 1999, MANAGE SCI, V45, P1579, DOI 10.1287-mnsc.45.11.1579; WHITT W, 1992, MANAGE SCI, V38, P706; WHITT W, 1984, MATH OPER RES, V9, P534, DOI 10.1287-moor.9.4.534; WOLFF F, 1989, STOCHASTIC MODELING12121
Comparison of bolus only with bolus plus infusion of bivalirudin in patients undergoing elective percutaneous coronary intervention: A retrospective observational study
No full textBackground: Anticoagulation therapy during percutaneous coronary intervention (PCI) has been the focus of numerous clinical trials. Low-anticoagulant doses have been successfully used in patients undergoing elective PCI, a situation with low-thrombogenic milieu. Objective: The purpose of the study was to evaluate the safety and efficacy of shorter duration of treatment with bivalirudin in patients undergoing elective PCI and receiving optimal antiplatelet therapy. Methods: We compared patients undergoing PCI who received aspirin and clopidogrel loading dose in addition to either conventional bivalirudin dosing (intravenous [IV] bolus of 0.75 + 1.75 mg-kg per h for the duration of PCI; n = 197) or a reduced bivalirudin dose (IV bolus of 0.75 mg-kg; n = 200). Results: Procedural success was obtained in 100percent of cases. The primary end point (in-hospital death, acute myocardial infarction, or need for urgent target vessel revascularization) did not differ between both the groups (6 patients [3percent] in the conventional dose group vs 5 patients [2.5percent] in the reduced dose group). Major bleeding occurred in 1 patient in the conventional dose group (P = nonsignificant [NS]). Minor bleeding occurred in 4 patients (2percent) in the conventional dose group vs 5 patients (2.5percent) in the reduced dose group (P = NS) and was mainly due to bleeding at entry site. Conclusion: In patients undergoing elective PCI, using bivalirudin as a bolus only dosing may be as effective and less costly when compared with bolus followed by an infusion for the duration of the intervention. A larger study is needed to confirm our findings. © The Author(s) 2012
Photocatalytic degradation of 1,10-Dichlorodecane in Aqueous suspensions of TiO2: a reaction of Adsorbed chlorinated alkane with Surface hydroxyl radicals.
No full text1,10-Dichlorodecane (D2C10) is shown to be effectively photodegraded in aqueous suspensions of TiO2 using a photoreactor equipped with 300 nm lamps. Solutions exposed to UV light intensities of 3.6 × 10-5 Ein L-1 min-1, established by ferrioxalate actinometry, showed negligible direct photolysis in the absence of TiO2. The degradation rate was optimal with 150 mg/L of TiO2 and a D2C10 concentration (240 μg/L) approaching its solubility limit. Kinetics of photodegradation followed a Langmuir−Hinshelwood model suggesting that the reaction occurred on the surface of the photocatalyst. The presence of h+vb and OH• radical scavengers, including methanol and iodide, inhibited the degradation supporting a photooxidation reaction. Electron scavengers (Ag+, Cu2+, and Fe3+) had small effects on the degradation rate. The lack of transformation of D2C10 in acetonitrile as solvent indicated that the major oxidants were OH• radicals. The presence of tetranitromethane, effectively eliminating the formation of free OH• radicals, did not affect the degradation rates significantly. This result, combined with observed increases in photolysis rates with the degree of adsorption of D2C10 onto the surface of the photocatalyst, confirmed that the reaction involved adsorbed 1,10-dichlorodecane and surface bound OH• radicals
Modern Arabic literary biography : a study of character portrayal in the works of Egyptian biographers of the first half of the twentieth century, with special reference to literary biography
No full textIn Chapter one, I presented a comparative definition of the meaning of Sirah (PI.Siyar), Tarjamah (Pl. Tarajim), Manaqib, Tabaqat and Maghazi as they were understood in antiquity. I also showed how the meaning of Sirah in modern times has only narrowly developed. Although the method of biographical writing continuously developed in Europe, it hardly progressed in Modem Arabic Literature. The only exception was seen in the writings by the pioneers of enlightenment in Egypt at the beginning of the twentieth century. This change of direction relied on borrowing European methodology in biographical writing.
In chapter two, I reviewed the early attempts at writing biographies in the nineteenth century by Abd al Rahman al- Jabarti and Ali Mubarak. Although both were the first
pioneers in this respect, yet they followed the footpath of classical approach above all that of al-Maqarizi from whom -Ali Mubarak derived inspiration in his book Al-Khitat al-Tawfiqiyyah.
In chapter three, I studied the twentieth century, starting with traditional biography writers who could not employ European methodologies and whose writings oscillated between biographical notes and biographical sketches; or whose texts were more of a literary study than a biography proper.
In chapters four to nine, I selected the most renowned, productive writers who best represented methodologies of biography writing. Perhaps certain writers have not
been mentioned in this period of study. This is not out of negligence but simply because their texts were totally out of reach, or their writings did not exhibit the
required literary criteria.
All methodologies representing the theory of biography writing in Egypt have been analysed in these chapters. All, in fact, form a digestion or assimilation of French,English and German schools. In Egypt, Taha Husayn is considered the chairman of the French school, al-Mazini and al-Aqqad of the English/German schools, al-Nuwaihi of the psychoanalytical/anatomical school and Sidqi who employed both. By contrast, al Iryan was the trailblazer of the distinguished biographical novel.
In these chapters, I tried to lay out the general outlines these writers have produced in the production of biographical texts, and how these attempts were a successful step on the road of presenting literary biographies characterized by high world standards.
Chapter ten may well seem traditional, but it is important to give a comparative outlook on the views of biography writers themselves when they study and analyse
the same character.
Among the characters studied ,I selected Bashsliar, Abu Nuwas, Ibn al-Run-i, al-Mutanabbi and al-Maarri. These are outstanding landmarks in the history of Arab verse and the subject of a multitude of studies as well. Modern biographers took these figures as a test field for the deployment and employment of biographical methodologies. I selected these examples to provide comparisons and explain how far these biographies were successful in producing a biography or a profile of those classical poets.
The conclusion and the bibliographical list arrived at the end of research.
I wish, however, to clarify one important point here. It seems that I could not fix the year 1950 as the temporal parameter of my research but took some textswhich were
published shortly beyond that point. The reason for this obvious extension was either to give additional useful details or simply because chapters of such texts had already
been published prior to that year and were known to the readership.
At times I would satisfy myself with analysing the part rather than the whole. This again was meant to eschew repetition or was due to the fact that the book in question
was not available
Homogeneous degradation of 1,2,9,10-tetrachlorodecane in aqueous solutions using hydrogen peroxide, iron and UV light
No full textThe homogeneous degradation of the polychlorinated n-alkane, 1,2,9,10-tetrachlorodecane (T4C10), was studied in aqueous solutions of hydrogen peroxide, including Fenton and photo-Fenton reaction conditions. All solutions were adjusted to a pH of 2.8 and an ionic strength of 0.1 M NaClO4 prior to photolysis. T4C10 (2 x 10(-6) M) was substantially degraded by the H2O2/UV system (1.0 x 10(-2) M H2O2), with 60% disappearance in 20 min of irradiation in a photoreactor equipped with 300 nm lamps of light intensity 3.6 x 10(-5) Ein L(-1) min(-1) (established by ferrioxalate actinometry). The reaction produced stoichiometric amounts of chloride ion indicating complete dechlorination of the chlorinated n-alkane. T4C10 degraded very slowly under Fenton (Fe2+/H2O2/dark) and Fenton-like (Fe3+/H2O2/dark) conditions. However, when the same solutions were irradiated, T4C10 degraded more rapidly than in the H2O2/UV system, with 61% disappearance in 10 min of exposure. The rapid degradation is related to the enhanced degradation of hydrogen peroxide to oxidizing *OH radicals under photo-Fenton conditions. Degradation was inhibited in both the H2O2/UV and photo-Fenton systems by the addition of KI and tert-butyl alcohol due to *OH scavenging
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