196,033 research outputs found
Is intraoperative neuromonitoring effective in hip and pelvis orthopedic and trauma surgery? A systematic review
No full textAbstract Introduction Sciatic nerve injury is an uncommon but potentially devastating complication in hip and pelvis surgery. Intraoperative nerve monitoring (IONM) was applied since the seventies in neurosurgery and spine surgery. Nowadays, IONM has gained popularity in other surgical specialities including orthopaedic and trauma surgery. Aim of this systematic review is to resume the literature evidences about the effectiveness of intraoperative monitoring of sciatic nerve during pelvic and hip surgery. Methods Two reviewers (GC and MD) independently identified studies by a systematic search of PubMed and Google Scholar from inception of database to 10 January 2021. Inclusion criteria were: (a) English written papers, (b) use of any type of intraoperative nerve monitoring during traumatic or elective pelvic and hip surgery, (c) comparison of the outcomes between patients who underwent nerve monitoring and patient who underwent standard procedures, (d) all study types including case reports. The present review was conducted in accordance with the 2009 PRISMA statement. Results The literature search produced 224 papers from PubMed and 594 from Google Scholar, with a total amount of 818 papers. The two reviewer excluded 683 papers by title or duplicates. Of the 135 remaining, 72 were excluded after reading the abstract, and 31 by reading the full text. Thus, 32 papers were finally included in the review. Conclusions The use of IONM during hip and pelvis surgery is debated. The review results are insufficient to support the routine use of IONM in hip and pelvis surgery. The different IONM techniques have peculiar advantages and disadvantages and differences in sensitivity and specificity without clear evidence of superiority for any. Results from different studies and different interventions are often in contrast. However, there is general agreement in recognizing a role for IONM to define the critical maneuvers, positions or pathologies that could lead to sciatic nerve intraoperative damage. Level of evidence Level 2
Osteoporotic distal femur fractures in the elderly: Peculiarities and treatment strategies
No full textDistal femur fractures account for 4-6% of osteoporosis related fractures of the femur in the elderly population. They represent a relevant cause of morbidity and mortality in the geriatric population with a reported 1-year mortality reaching 30%. Non-displaced fractures or even displaced fractures in patients with high operative risk can be treated conservatively. However, operative treatment is the most widely accepted management option for displaced fractures. The advantage resides in early mobilization and weight-bearing, reducing risks related with a prolonged immobilization when compared with conservative treatment. On the other hand, the intrinsic difficulty of fixing an osteoporotic bone is a major concern. The presence of osteosynthesis devices or prosthetic implants in the femur can make the surgical treatment more challenging, sometimes limiting therapeutic options. Aim of the present paper is to review the most recent literature about osteoporotic distal femur fractures in the elderly, including periprosthetic and other hardware related fractures, to highlight current evidence on management options and related results as a guide for the daily clinical practice. (www.actabiomedica.it)
Efecto de las fitohormonas sobre el control de la fructificación en manzanos
No full textTwo experiments were done in apples cv. Royal Gala to evaluate different hormones for fruit thinning. In one of them, the cultivar was grafted over rootstock M9 and in the other one on M4. Treatments applied in both experiments were: 1: Benzyladenine (BA) 100 ppm when mean fruit diameter (FD) was between 8 to 12 mm; 2: Naftalen Acetic Acid (NAA) 10 ppm at 5 mm FD; 3: NAA 10 ppm at 5 mm FD + BA 50 ppm when FD was between 8 to 12 mm; 4: NAA10 ppm at 5 mm FD + BA 75 ppm when FD was between 8 to 12 mm; 5: NAA 10 ppm at 5 mm FD + BA 100 ppm when FD was between 8 to 12 mm; 6: Control: hand thinning. Response variables were: number of fruit per cm2 Branch Cross Sectional Area (BCSA) and per 100 flower clusters; and fruit set distribution (percentage of spurs where fruit set was 0, 1 or +1). At commercial harvest fruit weight, mayor and minor diameter and length of each fruit were measured and classified according to commercial sizes of the standard box (18 kg). Data were analyzed using the procedure of analysis of Variance (ANOVA); Chi-square test and principal component analysis. All the combinations of NAA + BA were effective for fruit thinning and resulted in similar fruit set and fruit sizes, thus applications of NAA at 10 ppm + BA at 50 ppm were a good alternative to thin fruits with lower costs and less environmental impact due to lower doses. Apples treated with BA had higher commercial sizes than control ones.Con el objetivo de evaluar el efecto de diferentes fitohormonas en el raleo de frutos en manzanos se realizaron dos experimentos en la cv. Royal Gala. En uno, la cultivar estaba injertada sobre portainjerto M9 y en el otro sobre M4. Los tratamientos aplicados en ambos ensayos fueron: 1: Benciladenina (BA) 100 ppm cuando la media de diámetro de fruto (DF) era de 8 a 12 mm; 2: Acido Naftalen Acético (ANA) 10 ppm a 5 mm DF; 3: ANA 10 ppm a 5 mm DF + BA 50 ppm con DF de 8 a 12 mm; 4: ANA10 ppm a 5 mm DF + BA 75 ppm con DF de 8 a 12 mm; 5: ANA 10 ppm a 5 mm FD + BA 100 ppm con DF de 8 a 12 mm; 6: Testigo: raleo manual. Las variables de respuesta fueron: número de frutos cuajados por área de la sección transversal de la rama (ASR); número de frutos cuajados cada 100 ramilletes florales; distribución del cuaje (porcentaje de dardos donde cuajaron 0, 1 o más de 1 fruto). En cosecha se evaluó el peso, diámetro mayor, diámetro menor y longitud de cada fruto y se realizó una clasificación de tamaños comerciales de acuerdo a una caja Mark IV de 18 kg. Los datos se analizaron mediante el análisis de la Varianza (ANOVA); prueba Chi cuadrado y análisis de componentes principales. Todas las combinaciones ANA + BA fueron efectivas en el raleo de frutos y resultaron en un cuaje y tamaño de frutos similares. Por lo tanto aplicaciones de ANA 10 ppm a 5 mm DF + BA 50 ppm son una buena alternativa para el control de la fructificación en Royal Gala. Los tamaños comerciales de las manzanas tratadas con BA fueron superiores a los del testigo
Regulación de la carga frutal en agroecosistemas de perales mediante programas de extinción de frutos.
No full textThe objective of this investigation was to regulate fruit tree crop through fruit extinction. To do that in two different agroecosystems of pear trees cv. Williams the following treatments were applied in a complete randomized design: 1: 6-Benzyladenine (BA): 200 ppm when mean fruit diameter (FD) was 20 mm; 2: BA 150 ppm at 14 mm FD; 3: BA 75 ppm at 7 mm FD + another application of BA 75 ppm at 14 mm FD; 4: Urea 7,5 % at 80 % full bloom; 5: Urea 7,5 % at 80 % full bloom + another application of BA 75 ppm at 14 mm FD; 6: Control: hand thinning. Response variables were: number of fruit per cm2 Branch Cross Sectional Area (BCSA) and per 100 flower clusters; fruit set distribution (percentage of spurs where fruit set was 0, 1 or +1) and number of hand thinned fruits per cm2 BCSA. At harvest, fruits were classified according to commercial sizes of the standard box (18,2 kg). Data were analyzed using the procedure of analysis of Variance; Chi-square test and principal component analysis. Trees treated with BA had higher fruit extinction using doses of 150 ppm at 14 mm FD or with repeated
application of 75 ppm at 7 and 14 mm. 200 ppm of BA at 20 mm FD were not effective. Urea treatments did not regulate crop load. A higher percentage of fruit with big sizes were observed in the BA treated trees. In one of the plots, repeated application of BA at 75 ppm showed the highest percentage of fruit big sizes (110, 120 and 135); these three sizes together were 58,12 % of the harvested fruits of this treatment. In the other plot, Urea + BA at 75 ppm had the highest percentage of these three sizes.El objetivo del presente trabajo fue regular la carga frutal mediante extinción de frutos en agroecosistemas de hoja caduca. Para ello, en dos agroecosistemas de perales cv. Williams se realizaron los siguientes tratamientos: 1: 6-Benciladenina (BA): 200 ppm cuando la media de diámetro del fruto (DF) era de 20 mm; 2: BA 150 ppm a 14 mm DF; 3: BA 75 ppm a 7 mm DF + otra aplicación de BA 75 ppm a 14 mm DF; 4: Urea 7,5 % a 80 % de floración; 5: Urea 7,5 % a 80 % de floración + una aplicación de BA 75 ppm a 14 mm DF; 6: Testigo: raleo manual. Las variables analizadas fueron: número de frutos cuajados/Área Seccional de Rama (ASR); número de frutos cuajados·100 ramilletes florales-1; distribución del cuaje: porcentaje de dardos donde cuajaron 0, 1 o más de 1 fruto y número de frutos raleados manualmente·cm-2 ASR. A cosecha se evaluaron los tamaños comerciales de los frutos en una caja estándar de 18,2 kg. Los datos se analizaron utilizando el procedimiento de Análisis de la Varianza; prueba Chi cuadrado y análisis de componentes principales. En los árboles tratados con BA se observó
una mayor extinción de frutos al utilizar concentraciones de 150 ppm a 14 mm DF o aplicaciones repetidas de 75 ppm a 7 y 14 mm DF. Concentraciones de BA de 200 ppm aplicadas a 20 mm DF no fueron efectivas ya que su aplicación fue muy tardía. Los tratamientos con urea no lograron regular la carga frutal en forma significativa. En los tratamientos con BA se observó un mayor porcentaje de frutos de tamaños grandes. En uno de los agroecosistemas, las aplicaciones repetidas de BA a 75 ppm mostraron el mayor porcentaje de frutos grandes (110, 120 y 135), estos tres tamaños juntos representaron el 58,12 % de los frutos cosechados de ese tratamiento y en el otro agroecosistema, el tratamiento combinado de Urea + BA 75 ppm fue el que obtuvo el mayor porcentaje de estos tres tamaños
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
Intern experience at CH���M Hill, Inc.: an internship report
No full textIncludes author's vita"Submitted to the College of Engineering of Texas A&M University in partial
fulfillment of the requirement for the degree of Doctor of Engineering."Includes bibliographical referencesA review of the author's internship experience with CH���M HILL, Inc.
during the period September 1975 through May 1976 is presented. During this nine month
internship the author worked as an Engineer II in the Industrial Processes discipline of this
large consulting engineering firm... The author's prime responsibility was as one of three
lead design engineers on the design of a large wastewater treatment facility for a pulp mill
in Hoquiam, Washington owned by ITT Rayonier Inc. The work generally consisted of the design
of individual treatment units and associated piping and pumping. The purpose of the project
was to provide wastewater treatment capabilities that would satisfy the effluent limitations
(standards) imposed upon the mill by the State of Washington Department of Ecology and the
U.S. Environmental Protection Agency. The author's assignment also entailed necessary
interaction with the project manager and other CH���M HILL design engineers and support staff
members, the client's representatives, and representatives of two other consulting engineering
firms working on the project. Thus, the internship position at CH���M HILL provided considerable
experience coordinating the author's work with the work of other engineers, guiding the design
and administrative efforts of a support staff, and interacting regularly with the client and
other consulting firms. This broad exposure to a variety of engineering and organizational
problems provided a valuable educational experience
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