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Borri, Antonio, Marco Corradi y Alessandro De Maria. "The Failure of Masonry Walls by Disaggregation and the Masonry Quality Index". Heritage 3, n.º 4 (22 de octubre de 2020): 1162–98. http://dx.doi.org/10.3390/heritage3040065.
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The visual method for assessment of the structural behaviour of historic masonry walls, known by the acronym MQI (Masonry Quality Index) was introduced in 2002 by a team of researchers from the University of Perugia, Italy. This is based on a visual survey of the faces and the cross section of a wall panel, and it aims at verifying if a wall complies with the “rules of the art”. Based on this analysis, it is possible to calculate a numerical index: numerous tests, carried out on site by the authors to validate the method, have demonstrated that the index is able to provide useful information about the mechanical characteristics and structural response, in general, of the analysed wall panel. The failure mode of a wall panel under the action of an earthquake is a critical aspect. In general, the failure modes can be categorized in two classes: masonry disaggregation and the development of a local or global mechanism of wall elements (macroelements). Several theoretical models and numerical simulations only consider the latter. In this paper, application of the MQI method is further investigated, with particular emphasis to those masonry typologies which are more prone to collapse by disaggregation during a seismic event. Under the action of an earthquake, some types of masonry are typically unable to deform and to split in macroelements, and another type of failure occurs: this is the so-called “masonry disaggregation” or “masonry crumbling”. This type of failure anticipates the ones resulting from macroelement methods or stress analysis. As a conclusion, these latter methods become completely inappropriate and potentially hazardous, as they overestimate the seismic capacity of the building under investigation. The MQI method has been adapted to assess the structural response of different types of masonry under the action of an earthquake. In detail, the aim was to verify when the phenomenon of masonry disaggregation is likely to occur.
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Nguyen, Quoc y Dimitrios Papavassiliou. "Quality Measures of Mixing in Turbulent Flow and Effects of Molecular Diffusivity". Fluids 3, n.º 3 (30 de julio de 2018): 53. http://dx.doi.org/10.3390/fluids3030053.
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Results from numerical simulations of the mixing of two puffs of scalars released in a turbulent flow channel are used to introduce a measure of mixing quality, and to investigate the effectiveness of turbulent mixing as a function of the location of the puff release and the molecular diffusivity of the puffs. The puffs are released from instantaneous line sources in the flow field with Schmidt numbers that range from 0.7 to 2400. The line sources are located at different distances from the channel wall, starting from the wall itself, the viscous wall layer, the logarithmic layer, and the channel center. The mixing effectiveness is quantified by following the trajectories of individual particles with a Lagrangian approach and carefully counting the number of particles from both puffs that arrive at different locations in the flow field as a function of time. A new measure, the mixing quality index Ø, is defined as the product of the normalized fraction of particles from the two puffs at a flow location. The mixing quality index can take values from 0, corresponding to no mixing, to 0.25, corresponding to full mixing. The mixing quality in the flow is found to depend on the Schmidt number of the puffs when the two puffs are released in the viscous wall region, while the Schmidt number is not important for the mixing of puffs released outside the logarithmic region.
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Bao, Xue Fang. "Human Resident Acoustical Environment and Acoustical Insulation of Residential Building". Applied Mechanics and Materials 368-370 (agosto de 2013): 435–40. http://dx.doi.org/10.4028/www.scientific.net/amm.368-370.435.
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The development of economytraffic and industry have brought worse noise-pollution of city residences environment,the human residing acoustical environment quality is getting worse ,the development of green residential acoustical environment is extremely urgent .Dwelling houses sound insulation ability is one of important index of its quality. This text aim at the sound insulation problem because of light-weight wall being used at large, analyze the principle of sound insulation and optimize it ,briefly introduce the construction project of dwelling house sound insulation of light-weight wall by experiment contrast, expatiate on the technology measure of improving performance of light-weight wall.
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Mckenzie, Kirsty M., Reeja Nasir, Yang Kong, Hasthi U. Dissanayake, Rowena McMullan, Adrienne Gordon, Alice Meroni, Melinda Phang y Michael R. Skilton. "Maternal Dietary Carbohydrate Intake and Newborn Aortic Wall Thickness". Nutrients 13, n.º 4 (20 de abril de 2021): 1382. http://dx.doi.org/10.3390/nu13041382.
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Evidence from animal models indicates that maternal diet during pregnancy affects offspring cardiometabolic health. Improving carbohydrate quality during high-risk pregnancies reduces aortic intima-medial thickness; a marker for early atherosclerosis; in the infant offspring. We sought to determine whether maternal carbohydrate quantity and quality are associated with newborn aortic intima-medial thickness in healthy pregnancies. Maternal diet throughout pregnancy was evaluated in 139 mother–child dyads using a validated food frequency questionnaire. Carbohydrate intake was expressed as quantity (% total energy), quality (fibre, glycaemic index), and glycaemic burden (glycaemic load). Aortic intima-medial thickness was measured by high-frequency ultrasound of the neonatal abdominal aorta. Neither quantity nor quality of maternal carbohydrate intake during pregnancy was associated with meaningful differences in offspring maximum aortic intima-medial thickness with the exception of fibre intake in women with overweight or obesity which was inversely associated (−8 μm [95% CI −14, −1] per g fibre, p = 0.04). In healthy pregnancy, the quantity and quality of maternal carbohydrate intake is likely not a meaningful modifiable lifestyle factor for influencing offspring vascular health. The effect of carbohydrate quality may only be evident in high-risk pregnancies, consistent with previous findings. These findings may be confirmed in prospective dietary trials in pregnancy.
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Abd Rahim, Ismail y Mohamad Saiful Nizam Mohamad. "TUNNEL SUPPORT BY ROCK QUALITY INDEX (Q) SYSTEM FOR ULTRABASIC ROCK: A CASE STUDY IN TELUPID, SABAH, MALAYSIA". Malaysian Journal of Geosciences 4, n.º 1 (28 de febrero de 2020): 22–25. http://dx.doi.org/10.26480/mjg.01.2020.22.25.
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The study area is underlain by the ultrabasic rock of partly Sabah Ophiolite Complex of Cretaceous ages. The objectives of this study are to determine the Q-value and to estimate the permanent support measures for 20m span, 10m high and eastern direction of the proposed tunnel in the study area. Engineering geological mapping (lithological and surface mapping and discontinuity survey), laboratory study (petrographical study) and testing (Uniaxial Compressive Strength testing) and data analysis (stereographic plots, Q system parameters evaluation and support estimation) was used in this study. The results show that the rock mass is classified as lherzolite, strong, excellent quality, more than four joint sets, slightly altered discontinuity wall, dry excavation and favourable stress condition. The equivalence dimension (De) are 15.4 for the permanent roof. The Q-value for permanent roof and wall of the proposed tunnel are 1.4 (Class D or poor and type 5) and 3.5 (Class D or poor and type 3), respectively. The permanent and temporary supports for the roof and wall are systematic bolting, 700J energy absorption of fiber reinforce sprayed concrete, 9-12 and 5- 6 cm thick fiber reinforce shotcrete, respectively.
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Huang, Changfu, Shuguang Tian, Qun Li y Jun Huang. "Evaluation of Rock Quality of Tunnel Wall Rock Based on Rough Set Theory and Unascertained Measurement Theory". Mathematical Problems in Engineering 2018 (24 de julio de 2018): 1–10. http://dx.doi.org/10.1155/2018/3571028.
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A method for classification of the tunnel wall rock is established based on the rough set theory and unascertained measurement theory. The saturated uniaxial compressive strength, rock mass integrity index, structural surface condition, seepage measurement of groundwater, and the angle between the hole axis and main structural surface are selected as the evaluation indexes. The problem of weight coefficients for these evaluation indexes is converted into that of significance estimating on the attributes in the rough set theory. The proposed method is verified by the wall rock data of Yuanyanghui tunnel. The results show that the proposed method has an excellent performance in good agreement with the practical situation of wall rock and is feasible to classify the wall rock. Finally, the proposed method is applied to Xihualing tunnel of Zhu-Yong Expressway. The results are basically the same as those from Delphi-ideal point method, set pair analysis method, and the actual situation, which proves that the rough set theory and unascertained measurement theory are effective for classification of the wall rock.
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Pujol, Santiago, Lucas Laughery, Aishwarya Puranam, Pedram Hesam, Li-Hui Cheng, Alana Lund y Ayhan Irfanoglu. "Evaluation of Seismic Vulnerability Indices for Low-Rise Reinforced Concrete Buildings Including Data from the 6 February 2016 Taiwan Earthquake". Journal of Disaster Research 15, n.º 1 (1 de febrero de 2020): 9–19. http://dx.doi.org/10.20965/jdr.2020.p0009.
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Communities need seismic vulnerability indices to identify which buildings are most susceptible to severe damage during earthquakes. To be of greatest value, these indices should be easy to use and should be vetted against data from previous earthquakes. To date, more than 800 reinforced concrete buildings have been surveyed after earthquakes for the purpose of evaluating a seismic vulnerability index proposed by Hassan and Sozen in 1997. This number includes 130 buildings surveyed after the 6 February 2016 earthquake in Taiwan. The data collected during these surveys consist of descriptions and photographs of damage, structural sketches, and measurements. Analyses of the data indicate that probability of severe damage and failure increases with decreasing column index and wall index (normalized measures of column and wall areas). They also suggest that the exact form of the threshold used to distinguish more vulnerable structures from less vulnerable structures is of little consequence in terms of the probable cost and benefits of the strengthening program this threshold may inform.
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Soudah, Eduardo, E. Y. K. Ng, T. H. Loong, Maurizio Bordone, Uei Pua y Sriram Narayanan. "CFD Modelling of Abdominal Aortic Aneurysm on Hemodynamic Loads Using a Realistic Geometry with CT". Computational and Mathematical Methods in Medicine 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/472564.
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The objective of this study is to find a correlation between the abdominal aortic aneurysm (AAA) geometric parameters, wall stress shear (WSS), abdominal flow patterns, intraluminal thrombus (ILT), and AAA arterial wall rupture using computational fluid dynamics (CFD). Real AAA 3D models were created by three-dimensional (3D) reconstruction of in vivo acquired computed tomography (CT) images from 5 patients. Based on 3D AAA models, high quality volume meshes were created using an optimal tetrahedral aspect ratio for the whole domain. In order to quantify the WSS and the recirculation inside the AAA, a 3D CFD using finite elements analysis was used. The CFD computation was performed assuming that the arterial wall is rigid and the blood is considered a homogeneous Newtonian fluid with a density of 1050 kg/m3and a kinematic viscosity of4×10-3Pa·s. Parallelization procedures were used in order to increase the performance of the CFD calculations. A relation between AAA geometric parameters (asymmetry index (β), saccular index (γ), deformation diameter ratio (χ), and tortuosity index (ε)) and hemodynamic loads was observed, and it could be used as a potential predictor of AAA arterial wall rupture and potential ILT formation.
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Liang, Ze, Zisheng Luo, Wenxuan Li, Mingyi Yang, Lei Wang, Xingyu Lin y Li Li. "Elevated CO2 Enhanced the Antioxidant Activity and Downregulated Cell Wall Metabolism of Wolfberry (Lycium barbarum L.)". Antioxidants 11, n.º 1 (22 de diciembre de 2021): 16. http://dx.doi.org/10.3390/antiox11010016.
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Modified atmosphere packaging (MAP) has been widely known to delay the postharvest fruit senescence; nevertheless, its effect on antioxidant activity and cell wall metabolism of wolfberry fruit is largely unknown. The present study investigated the impact of elevated CO2 on the quality attributes and cell wall degradation of wolfberry fruit during storage. The results showed that 10% CO2 better maintained the physiological quality and conferred the reduction in weight loss, decay index, and color change. Higher 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 1,1-diphenyl-1-picrylhydrazil (DPPH) radical scavenging activity, total phenol and flavonoid content, and superoxide dismutase (SOD) and catalase (CAT) activity of wolfberry were detected at elevated CO2 concentrations. Elevated CO2 atmosphere contributed to the maintenance of the cell integrity, the decrease of cell wall degradation (polygalacturonase, pectate lyase, cellulase, and β-glucosidase), and the increase of cellulose and proto pectin content. Overall, we revealed the potential mechanism of elevated CO2 on the antioxidant activity enhancement and cell wall homeostasis of fresh berry fruit.
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Wang, Jian Gang, Hua Lin Wang, Yi Fan y Yuan Huang. "The Index Matching Method and its Application in V3V Measurements". Advanced Materials Research 1051 (octubre de 2014): 946–50. http://dx.doi.org/10.4028/www.scientific.net/amr.1051.946.
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In imaging measurements on the fluid flow, the quality of particle image is essential to the outcomes of the velocity field. The method to eliminate the problems of refraction and reflection is to match the refractive indices of the working fluid and the surrounding solid wall. In this article, a comprehensive summary of the refractive index matching method was presented. Three fluid materials, two organic and one non-organic was used to conduct index matching and their effect were compared. Results show the perfect index matching is effective to improve the measurement accuracy of imaging measurements.
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Dlhý, Dušan. "The Effect of Free Joints on Sound Insulation of Constructions". Advanced Materials Research 855 (diciembre de 2013): 233–36. http://dx.doi.org/10.4028/www.scientific.net/amr.855.233.
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Noise protection of a building ́s interior is one of the fundamental functions of building constructions. These constructions can be understood as internal partitions, ceilings or external wall-/roof claddings. However, walls often consist of basic building materials and openings; such windows and doors as well as the acoustical properties of such structures are determined by both parts (e.g., a windows and the wall structure). The acoustical quality of opening is in general affected not only by the particular structure, but also by the concept of the mounting. Acoustical requirements should be applied in all its parts, such as the construction of the window (door) frame, window (door) wing and the realization of the functional gap as well as by application of a sealant. On the base of experimental measurements in Acoustics Chambers of the Faculty of Civil Engineering of Slovak Technical University and mathematical analysis we have determined index of sound insulation of free joint.
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Horrocks, A. Richard, Jane Allen, Sandra Ojinnaka y Dennis Price. "Influence of Laundering on Durable Flame Retarded Cotton Fabrics — Part 1. Effect of Oxidant Concentration and Detergent Type". Journal of Fire Sciences 10, n.º 4 (julio de 1992): 335–51. http://dx.doi.org/10.1177/073490419201000405.
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Cotton fabrics flame retarded with tetrakis (hydroxymethyl phosphonium chloride (THPC)-urea-ammonia polycondensate (Proban CC, Albright and Wilson Ltd., U.K.) have been subjected to up to 50 simulated hos pital wash cycles. Laundering variables include sodium perborate oxidant con centration, detergent type (liquid with no oxidant, powder with zeolite and sodium perborate and powder with polyphosphate and carbonate and per borate) and water hardness. The flame retardant system resisted all laundering systems in terms of the constancy of burning behaviour assessed by vertical strip (BS 5438) and limiting oxygen index (LOI) measurements. However, increased perborate con centration changed the thermogravimetric (TGA) response of laundered fabrics. Soft water washing promoted cotton fibre fibrillation independent of deter gent type; increased oxidant concentration promoted secondary wall damage. Hard water washing severely damaged fibre secondary walls and significant depositions of calcium ions often as phosphate occurred on fabric. Presence of the flame retardant was observed to have a stabilising fibrillar binding effect which was offset by a secondary wall crack promoting character.
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Younsi, Zohir, Lounes Koufi y Hassane Naji. "Numerical study of the effects of ventilated cavities outlet location on thermal comfort and air quality". International Journal of Numerical Methods for Heat & Fluid Flow 29, n.º 11 (4 de noviembre de 2019): 4462–83. http://dx.doi.org/10.1108/hff-09-2018-0518.
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Purpose A comprehensive investigation on the outlet air position effects on the thermal comfort and air quality has been achieved. In addition, airflow and temperature distributions in ventilated cavities filled with an air-CO2 mixture with mixed convection are predicted. The airflow enters from the cavity through an opening in the lower side of the left vertical wall and exits through the opening in one wall of the cavity. This paper aims to investigate the outlet location effect, four different placement configurations of output ports are considered. Three of them are placed on the upper side and the fourth on top of the opposite side of the inlet opening. A uniform heat and CO2 contaminant source are applied on the left vertical wall, while the remaining walls are impermeable and adiabatic to heat and solute. The cooling efficiency inside the enclosure and the average fluid temperature are computed for different Reynolds and Rayleigh numbers to find the most suitable fluid outlet position that ensures indoor comfortable conditions while effectively removing heat and the contaminant. This is demonstrated by three relevant indices, namely, the effectiveness for heat removal, the contaminant removal and the index of indoor air quality. Design/methodology/approach The simulations were performed via the finite-volume scSTREAM CFD solver V11. Three different values of CO2 amount are considered, namely, 103, 2 × 103 and 3 × 103 ppm, the Reynolds number being in the range 100 ≤ Re ≤ 800. Findings Based on the findings obtained, it is the configuration whose air outlet is placed near the heat source and the contaminant, which provides a better air distribution and a ventilation efficiency compared to the others ventilation strategies. Originality/value The studies on heat and mass transfers by natural and forced convection in ventilated cavities remain a fruitful research topic. Thereby, such a study deals with different ventilation strategies through cavities containing an air-CO2 mixture subjected to a mixed regime. In particular, the air inlet velocity and contaminant sources’ effects on thermal comfort and air quality have been investigated.
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Long, Hai-Tao, Zhen-Han Deng, Min Zou, Zhang-Yuan Lin, Jian-Xi Zhu y Yong Zhu. "Effects of the acetabular fracture index and other factors of posterior wall acetabular fracture on functional outcome". Journal of International Medical Research 45, n.º 4 (12 de junio de 2017): 1394–405. http://dx.doi.org/10.1177/0300060517709816.
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Objective To analyze the effects of the acetabular fracture index (AFI) and other factors on the functional outcome of patients with acetabular fractures involving the posterior wall. Methods Forty-eight patients who underwent surgery in our department were reviewed. According to the AFI, which indicates the percentage of remaining intact posterior acetabular arc, the patients were divided into Group A (AFI ≤ 25%, 11 patients), Group B (25% < AFI ≤ 50%, 23 patients), Group C (50% < AFI ≤ 75%, 7 patients), and Group D (75% < AFI ≤ 100%, 7 patients). The AFI was measured with a computed tomography picture archiving and communication system or calculated with the cosine theorem. A nonparametric test and ordinal regression were used to determine the role of the AFI and other factors on the functional outcome. Perioperative information, including demographic and fracture-related data, reduction quality, physical therapy duration, association with a lower limb fracture and avascular necrosis of the femoral head were prospectively gathered. Results The mean AFIs of A, B, C, and D groups were 14.3%, 35.9%, 59.5%, and 81.2%, respectively. No statistically significant differences were observed among the groups for demographic and fracture-related data. A better reduction quality (OR = 4.21, 95%CI 1.42 ∼ 12.43, χ2 = 6.781, P = 0.009) and a larger value of AFI (OR = 2.56, 95%CI 1.18 ∼ 5.55, χ2 = 5.648, P = 0.017) result in a higher functional score. The functional outcome of a physical therapy duration of more than 12 months (OR = 0.15, 95%CI 0.02 ∼ 0.90, χ2 = 4.324, P = 0.038) was better than that of less than 12 months. Lower limb fracture (OR = 0.13, 95%CI 0.02 ∼ 0.74, χ2 = 5.235, P = 0.022) and avascular necrosis of femoral head (OR = 0.02, 95%CI 0.00 ∼ 0.87, χ2 = 4.127, P = 0.042) were found to correlate with a lower functional score. Conclusion With a greater of AFI, the functional outcome score would be better. Other factors, including reduction quality, physical therapy duration, association with a lower limb fracture, and avascular necrosis of the femoral head, most likely also affect hip functional recovery.
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Wang, Chang Lin, Shuren Jiang, Bao Cun Li y Shuai Li. "Research on Mechanical Properties of a New Fabricated Wall Material in Building with Light Steel Structure". Materials Science Forum 1001 (julio de 2020): 145–54. http://dx.doi.org/10.4028/www.scientific.net/msf.1001.145.
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This paper introduced the specific application of a new fabricated wall material in building with light steel structure, and studied its structural component, model construction, construction and installation, and analysis and calculation in detail, etc. According to the national and local current national standard specifications, SAP2000 was used to theoretically calculate and analyze the strength, stiffness, stability performance and other and other performance indexes of material structure; and ABAQUS was used to conduct special analysis of joint mechanical properties at key parts of the wall material and steel structure, the Mise stress index was obtained, and all met the requirements after analysis. The results of various indexes show that this new wall material structure has a safe and reliable structural composition and excellent mechanical properties, and the material forms and material quality can be customized, it enriches the application design range of building material architecture and is worth promoting.
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Labia, Laura, Louena Shtrepi y Arianna Astolfi. "Improved Room Acoustics Quality in Meeting Rooms: Investigation on the Optimal Configurations of Sound-Absorptive and Sound-Diffusive Panels". Acoustics 2, n.º 3 (27 de junio de 2020): 451–73. http://dx.doi.org/10.3390/acoustics2030025.
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This work deals with the improvement of the room acoustic quality of two medium sized meeting rooms through the investigation of the optimal placement of absorption and diffusive panels on the walls and ceiling. Acoustic measurements have been carried out in the existing untreated rooms with ODEON 13 room acoustics measurement and prediction software, and the Adobe Audition plugins Aurora. Simulations of different combinations of sound absorption and diffusion treatments have been carried out with the updated version of the software, ODEON 15. The panels were positioned in the meeting rooms following the guidelines of the DIN 18041 standard and the scientific literature. The results advise the application of absorptive materials on the ceiling or around the borders, creating a reflective middle area, and on the upper part of one the lateral walls, including the rear wall. Configurations with diffusers do not generally bring significant improvements. The Speech Transmission Index (STI) is a less sensitive parameter for the different acoustic scenarios, compared to Reverberation Time (T) and Clarity (C50). The research also outlined a design workflow, useful to successfully design meeting rooms and rooms for speech in general, which allows to determine the optimal number and location of acoustic panels and to minimize the costs.
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Ogbu, Chukwuemeka Patrick. "Building Quality Condition and Maintenance Cost: The Case of Public Low Income Housing in Abia State, Nigeria". Journal of Construction Business and Management 1, n.º 2 (10 de julio de 2017): 24–34. http://dx.doi.org/10.15641/jcbm.1.2.78.
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Maintenance cost of buildings could constitute a major cost burden on low income housing dwellers. The purpose of this paper is to investigate the relationship between physical condition and maintenance cost of low income housing buildings. Data was gathered using structured questionnaire and score sheets. The questionnaires elicited responses on the respondents’ perception of their buildings’ physical condition. The score sheets were used by trained research assistants to generate information on the state of the physical conditions of the buildings. Data analyses were carried out using Mann-Whitney U test and Spearman’s correlation. The study found that the element with the highest relative condition index (RCI=0.78) is internal walls, while external wall finishes/decoration has the least (RCI=0.45). Similarly, the element with the highest quality index (QI=0.88) is soak away pit and septic tank, while internal ceiling finishes/decoration has the least QI (0.49). It was further discovered that a significant difference exists between the RCI which is based on the respondents’ perceptions, and the QI which is based on the research assistants’ scores. The relationship between QI and annual maintenance cost is not significant, while the relationship between RCI and annual maintenance cost is significant. It was concluded that the perception of the condition of a building by its owner, rather than the physical state of the building is the main driver of maintenance cost. The study recommends that low income housing end users should be allowed to make inputs at the conception and planning stages of their buildings.
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Genders, Roel E., Paul P. G. M. Kouwenberg y Rob P. Bleichrodt. "Abdominal wall repair with human acellular dermal autograft". Surgical Techniques Development 2, n.º 1 (30 de diciembre de 2011): 6. http://dx.doi.org/10.4081/std.2012.e6.
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Repair of abdominal wall defects in the presence of contamination or infection is a significant problem. The loss of tissue warrants enforcement of the abdominal wall, preferably by autologous material. However, autologous repair often requires extensive surgery. This paper presents a review of available literature of placement of an acellular human dermis to repair an abdominal fascia defect, in contaminated as well as in non-contaminated surgical fields. It is illustrated with a case report that describes the successful reconstruction of an infected abdominal wall defect with a human acellular dermis allograft. A systematic literature review was undertaken with searches performed in the Pubmed and Cochrane databases for the period up till March 2009, using the search terms <em>Alloderm</em> [Substance Name], <em>Hernia</em> [Mesh] and the key words <em>acellular dermis, acellular dermal matrix, human acellular dermal allograft </em>and <em>abdominal wall defect</em>. To assess methodological quality, each article was subjected to a modification of the methodological index for non-randomized studies (MINORS) according to Slim <em>et al.</em> Two items from the original index were not included because none of the studies selected had an unbiased assessment of the study end points and in none of the studies was a prospective calculation of the study size performed. Seventeen studies were included in the review. Data were extracted regarding study design, number of patients, surgical technique, followup period, contaminated or non-contaminated area of the fascia defect, mortality and morbidity (hemorrhage, seroma, wound dehiscence, infection) of the operative procedure, the longterm results (removal of the graft, reherniation and bulging) and level of evidencey. A total of 169 short-term complications and 151 longterm complications occurred after 643 surgical procedures reconstructing both contaminated and clean abdominal wall defects by implantation of an HADA. Human acellular dermal allograft seems to be a good alternative for autologous repair of contaminated or infected abdominal wall defects.
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Bains, Diksha, Aksh Chahal, Mohammad Abu Shaphe, Faizan Z. Kashoo, Taimul Ali, Ahmad H. Alghadir y Masood Khan. "Effects of Muscle Energy Technique and Joint Manipulation on Pulmonary Functions, Mobility, Disease Exacerbations, and Health-Related Quality of Life in Chronic Obstructive Pulmonary Disease Patients: A Quasiexperimental Study". BioMed Research International 2022 (30 de julio de 2022): 1–9. http://dx.doi.org/10.1155/2022/5528724.
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Chronic obstructive pulmonary disease (COPD) is primarily a disease of the lungs; however, extrapulmonary comorbidities like rib cage stiffness, decreased thoracic spine mobility, postural changes, and skeletal muscle dysfunctions also coexist. Muscle energy technique (MET) and joint manipulation (JM) may help alleviate these musculoskeletal problems. This study was aimed at evaluating the effectiveness of MET and JM on pulmonary functions, dyspnea, chest wall mobility, disease exacerbations, and health-related quality of life in COPD patients. A total of 16 patients (7 women and 9 men) suffering from COPD between the ages of 35 and 65 years participated in the study. Pretest-posttest quasiexperimental design was used. MET was applied to the sternocleidomastoid, anterior scalene, pectoralis major muscles, and at the C4-C6 level of the cervical spine. Maitland JM was performed in the thoracic region at the intervertebral, costovertebral, and costotransverse joints. The treatment intervention lasted for 3 weeks. FEV1/FVC, maximum inspiratory pressure (MIP), SpO2, modified Borg dyspnea scale (MBDS), COPD assessment test (CAT), mMRC dyspnea scale, BODE index, right and left hemidiaphragm excursion, and chest wall expansion at T4 and T10 levels were the outcome measures. Significant improvement ( p < 0.05 ) was observed in FEV1/FVC, MIP, SpO2, MBDS, CAT, mMRC dyspnea scale, BODE index, and chest expansion at T4 and T10 levels. Only for the hemidiaphragm excursion, no significant ( p > 0.05 ) improvement was observed. Combined application of MET to accessory respiratory muscles and cervical spine and JM to thoracic spine improved pulmonary functions, chest wall mobility, and health-related quality of life and reduced dyspnea and disease exacerbations in patients with mild to moderate COPD.
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Drabovsky, V. S. "BIOMECHANICAL ABDOMINOPLASTY TECHNIQUES AND LIFE QUALITY OF PATIENTS WITH COSMETIC DEFECTS OF ANTERIOR ABDOMINAL WALL". Актуальні проблеми сучасної медицини: Вісник Української медичної стоматологічної академії 19, n.º 3 (8 de noviembre de 2019): 21–26. http://dx.doi.org/10.31718/2077-1096.19.3.21.
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Investigating life quality is remaining high in the context of healthcare reforming processes and in modern medicine. An increase in the number of surgical operations for cosmetic defects of the anterior abdominal wall, an increase in the requirements for treatment results, forced surgeons to look for alternative methods of treatment that would significantly reduce aesthetic defects and improve the quality of life by examining the effect of surgical treatment on the mental and physical components of health. This predetermined the purpose of this study. To achieve the goal, the results of a comprehensive clinical examination and correction of 81 patients with cosmetic defects of the anterior abdominal wall, who took the treatment at the clinic of the Department of Surgery No. 3, Ukrainian Medical Stomatological Academy, from 2012 – 2019, were analyzed. The main group (41) was operated on by using the biomechanical methods of abdominoplasty worked up by the author, taking into account the best angle of direction of the stress vectors in the tissue of the upper transverse skin-fat flaps in the postoperative period during stress relaxation. The comparison group consisted of 40 people operated on by standard techniques of mobilization and fixation of skin-fat flaps. Quality of life was assessed the day before the operation and 6 months after, according to the EUROQol-5S-5D questionnaire system. Based on the analysis of the results, the following conclusions have been drawn: surgical correction of cosmetic defects of anterior abdominal wall causes psycho-emotional and physiological prerequisites for growing physical activity of patients, and in 6 months in positively effects the self-assessment of patients’ health status. Overweight patients demonstrate a statistically significant decrease in body mass index during the year, which is inversely correlated with an improvement in the scores on the rating scale and a weak correlation with a change in the average scoring and self-assessment of body weight. This integrated technique for performing abdominoplasty in patients with cosmetic defects of the anterior abdominal wall has been proven as effective means, which can improve the quality of life of surgical patients.
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Psota, Vratislav, Marián Svorad, Markéta Musilová y Michaela Neméthová. "Barley varieties registered in the Slovak Republic after the harvest of 2021". KVASNY PRUMYSL 68, n.º 2 (19 de abril de 2022): 585–89. http://dx.doi.org/10.18832/kp2021.68.585.
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After three years of testing, the spring barley varieties Amidala, Ellinor and LG Belcanto were registered in the Slovak Republic. Extract of the varieties was between 82.3 and 82.8 %. The varieties showed optimal to high levels of proteolytic modification (Kolbach index 48.6 to 49.4 %) and satisfactory to optimal malt quality (final attenuation 80.9 to 81.5 %). Cell wall degradation was optimal (high friability 87 to 92 %). The beta-glucan content of the wort was satisfactory to optimal (174 to 68 mg/l).
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Li, Chong Da, Lin Li, Guo Qin Liu y Li Juan Han. "Preparation of Sea Buckthorn Oil-Plga Microspheres via the Emulsion-Solvent Evaporation Process Coupling Ultrasonic Treatment". Advanced Materials Research 365 (octubre de 2011): 292–98. http://dx.doi.org/10.4028/www.scientific.net/amr.365.292.
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The optimal preparation conditions of sea buckthorn oil-poly (lactic-co-glycolic acid) (PLGA) microspheres were studied via the emulsion-solvent evaporation process coupling ultrasonic treatment, using polyvinyl alcohol (PVA) as the emulsifier, PLGA as the wall material, a mixture of dichloromethane and ethyl acetate as the oil phase. The research discussed the effects of the PVA concentration, the PLGA dosage, ultrasonic power and ultrasonic time on comprehensive quality index (S) of sea buckthorn oil-PLGA microspheres. The orthogonal experimental design L9(34) with the factor analysis was applied to optimize preparation conditions. The experimental date showed that the optimal technology preparation conditions for sea buckthorn oil-PLGA microspheres were as follows: the concentration of PVA 0.125 g/ml, PLGA loading 125 mg, ultrasonic time 10 min, and ultrasonic power 180W. It resulted in sea buckthorn oil-PLGA microspheres that were in more regular and smaller shape, and with a better comprehensive quality index.
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Kong, Hui, Zhufeng Yu, Jun Zhang, Yijie Han, Lin Wu, Hongsheng Wang y Jian Wang. "Perspective of CIGS-BIPV’s Product Competitiveness in China". International Journal of Photoenergy 2020 (11 de agosto de 2020): 1–10. http://dx.doi.org/10.1155/2020/5392594.
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Copper indium gallium selenide (CIGS) thin-film battery has high photoelectric conversion efficiency, better spectral dispersion ability, and weak light-adsorption characteristics, as well as shape and size flexibility. CIGS-BIPV (building integrated photovoltaic) has attracted more and more research attention with the advantages of good curvature, form and color diversity, and broad application prospects. This paper uses the classical “Porter’s Five Forces Model” to make a preliminary analysis of the competitiveness of CIGS-BIPV products. A more specific competitiveness analysis model is further built with the index modeling method, and the competitiveness of CIGS-BIPV products is thoroughly analyzed from qualitative and quantitative perspectives. Six primary research indicators are used, i.e., safety index, building aesthetics index, economic index, energy-saving and environmental protection index, innovation index, and sales force index. The weight analysis of index modeling shows that compared with a glass curtain wall, exterior stone, and silica-based BIPV, CIGS-BIPV is characterized by high product competitiveness, acceptable cost, attractive appearance, environmental benignity, high technical quality, and certain economic benefits. The product competitiveness of CIGS-BIPV could be further enhanced through the construction and promotion of sales channels.
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Dahat, Shubham, Kjell Hurtig, Joel Andersson y Americo Scotti. "A Methodology to Parameterize Wire + Arc Additive Manufacturing: A Case Study for Wall Quality Analysis". Journal of Manufacturing and Materials Processing 4, n.º 1 (19 de febrero de 2020): 14. http://dx.doi.org/10.3390/jmmp4010014.
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The objective of this work was the development of a methodology to parametrize wire + arc additive manufacturing (WAAM), aiming dimension repeatability, and tolerances. Parametrization of WAAM is a difficult task, because multiple parameters are involved and parameters are inter-dependent on each other, making overall process complex. An approach to study WAAM would be through operational maps. The choice of current (Im) and travel speed (TS) for the desirable layer width (LW) determines a parametrization that leads to either more material or less material to be removed in post-operations, which is case study chosen for this work. The work development had four stages. First stage, named ‘mock design’, had the objective of visualizing the expected map and reduce further number of experiments. At the second stage, ‘pre-requisite for realistic operational map’, the objective was to determine the operating limits of TS and Im with the chosen consumables and equipment. Within the ‘realistic operational map’ stage, a design for the experiments was applied to cover a parametric area (working envelope) already defined in the previous stage and long and tall walls were additively manufactured. Actual values of LW (external and effective layer width) were measured and an actual operating envelope was reached. According to the geometry-oriented case study, a surface waviness index (SWindex) was defined, determined, and overlapped in the envelope. It was observed that the walls with parameters near the travel speed limits presented higher SWindex. This operational map was further validated (fourth stage) by selecting a target LW and finding corresponding three parametric set (covering the whole range of operational map) to produce walls on which geometry characterization was carried out. After geometry characterization, obtained LW was compared with the target LW (the maximum values were very tied, with deviations from +0.3 to 0.5 mm), with a SWindex deviation at the order of 0.05. Both results evidence high reproductivity of the process, validating the proposed methodology to parametrize WAAM.
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Fan, Ridong, Yuling Yang y Songyu Liu. "Impact of In Situ Soil in Soil-Bentonite Cutoff Wall Backfill on Compressibility and Hydraulic Conductivity". Advances in Civil Engineering 2021 (19 de enero de 2021): 1–12. http://dx.doi.org/10.1155/2021/9350604.
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Soil-bentonite cutoff walls, consisting of excavated in situ soil and bentonite as backfills, are used extensively as vertical barriers for groundwater pollution control. Sand mixed with high-quality natural sodium bentonite (NaB) is commonly used as a research object to investigate the hydraulic and compression properties of soil-bentonite backfills. However, pure sand could rarely be found in real conditions, and natural NaB may not be available readily in some countries such as China, India, and Turkey. This paper presents a comprehensive laboratory investigation on the compressibility and hydraulic conductivity (k) of soil-bentonite backfills created by simulated in situ soil and low-quality sodium activated calcium bentonite (SACaB). The simulated in situ soils are prepared using sand-natural clay mixtures with sand to natural clay mass ratios ranging from 0.5 to 6.0, and the bentonite content (BC) in the base mixture ranges from 0 to 15%. The result indicates that BC dominates the compression index (Cc) of the backfill, and a unique relationship between void ratio at effective vertical compression stress of 1 kPa and compression index is proposed for various types of soil-bentonite backfills. An increase in either BC or clay size fraction (CF) in simulated in situ contributes to reducing k, but the impact of CF in simulated in situ soil on k tends to be insignificant for backfill with BC higher than 6%. A new characteristic parameter based on the concept of void ratio of bentonite (eb), named apparent void ratio of clay size fraction (eC), is developed for predicting soil-bentonite backfills created by in situ soils and bentonites with various contents.
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Li, Jian Guang, Li Ping Tong y Li Hui Tian. "Thermal Performance Analysis for a New External Wall Insulation System". Advanced Materials Research 383-390 (noviembre de 2011): 6476–83. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.6476.
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Based on the existing quality problems of external wall insulation system, a new external wall insulation system was developed through the rational use of closed air layer’s thermal insulation performance. Considering three kinds of ways of heat transfer-- convection, conduction and radiation and using the coefficient of air equivalent thermal conductivity to obtain the thermal resistance in the air layer, compared with the thermal resistance at different thicknesses in the new system using polyurethane and polystyrene board of insulation material with two different thicknesses, the authors can get the most optimal model. This paper takes the extreme value of indoor and outdoor temperature in summer as the temperature loads of this model and uses ANSYS simulation to obtain its heat flow density, gradient and temperature field, and in the meanwhile, undertakes a comparison with the present form of external wall insulation in the new code. Data indicates that in the same index of energy saving, this system can not only meet the needs of the code, but also reduce the requirement of heat insulator, as well as greatly improve anti-cracking and waterproofing ability. Thus, the new system follows the direction of the development in this field.
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Caruso, Gianluca, Vasile Stoleru, Stefania De Pascale, Eugenio Cozzolino, Antonio Pannico, Maria Giordano, Gabriel Teliban, Antonio Cuciniello y Youssef Rouphael. "Production, Leaf Quality and Antioxidants of Perennial Wall Rocket as Affected by Crop Cycle and Mulching Type". Agronomy 9, n.º 4 (16 de abril de 2019): 194. http://dx.doi.org/10.3390/agronomy9040194.
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The plastic mulch has raised a disposal issue, which has been diverting the research focus on biodegradable film as an alternative. Research was carried out in southern Italy in 2016–2017 and 2017–2018 in order to assess the effects of three crop cycles (autumn-winter, winter, spring) in factorial combination with three soil mulching types (a MaterBi biodegradable black film; a brown photoselective low density polyethylene (LDPE) film; a black-standard LDPE film) and a non-mulched control, on leaves yield, quality and antioxidants of greenhouse grown Diplotaxis tenuifolia (L.) D.C. The spring cycle was the shortest and best enhanced plant growth and yield. The non-mulched control caused an 11% yield reduction compared to the mulching treatments average (12.4 t ha−1). The soil temperature was highest under photoselective and standard LDPE films. The Soil Plant Analysis Development (SPAD) index was 17.4% higher in the leaves grown in mulched soil. Winter season and biodegradable mulch led to higher leaf dry residue and organic acids. Leaf nitrate content was highest in winter and under mulching. The spring cycle, the biodegradable and photoselective LDPE film resulted in the highest antioxidant compound content and activity. The biodegradable polymer improved leaf quality, showing suitable features for sustainable production.
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Caruso, Gianluca, Christophe El-Nakhel, Youssef Rouphael, Ernesto Comite, Nadia Lombardi, Antonio Cuciniello y Sheridan Lois Woo. "Diplotaxis tenuifolia (L.) DC. Yield and Quality as Influenced by Cropping Season, Protein Hydrolysates, and Trichoderma Applications". Plants 9, n.º 6 (30 de mayo de 2020): 697. http://dx.doi.org/10.3390/plants9060697.
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Increasing attention is being given to plant biostimulants as a sustainable farming practice aimed to enhance vegetable crop performance. This research was conducted on greenhouse-grown perennial wall rocket (Diplotaxis tenuifolia (L.) DC.), comparing three biostimulant treatments (legume-derived protein hydrolysates, Trichoderma harzianum T22, and protein hydrolysates + Trichoderma harzianum T22) plus an untreated control, in a factorial combination with three cropping seasons (autumn–winter, winter, winter–spring). Measurements were performed on leaf yield components, colorimetric indicators, mineral composition, bioactive compounds, and antioxidant activity. Leaf marketable yield and mean weight, as well as plant dry weight, showed the highest values in winter crop cycle. Biostimulant treatments resulted in 18.4% and 26.4% increase in leaf yield and number of leaves per rosette, respectively, compared to the untreated control. Protein hydrolysates led to the highest plant dry weight (+34.7% compared to the control). Soil plant analysis development (SPAD) index as well as NO3, PO4, SO4, and Ca contents were influenced more during the winter–spring season than the winter cropping season. The winter production season resulted in a 19.8% increase in the leaf lipophilic antioxidant activity, whereas the hydrophilic antioxidant activity was 34.9% higher during the winter–spring season. SPAD index was the highest with protein hydrolysates + Trichoderma applications, which also increased the colorimetric parameters compared to the untreated control. The treatment with protein hydrolysates + Trichoderma enhanced N, PO4, Mg, and Na contents, compared to both biostimulants applied singly and to the untreated control. Both biostimulants applied alone or the protein hydrolysates + Trichoderma combination led to the increase of the lipophilic and hydrophilic antioxidant activity, as well as ascorbic acid and chlorophyll b, compared to the untreated control. The present research revealed that protein hydrolysates and Trichoderma single applications, and even more their combination in the case of some nutrients content, represent an effective tool for enhancing the yield and the quality attributes of perennial wall rocket produced under the perspective of sustainable crop system.
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Feng, Su-Wei, Zhen-Gang Ru, Wei-Hua Ding, Tie-Zhu Hu y Gan Li. "Study of the relationship between field lodging and stem quality traits of winter wheat in the north China plain". Crop and Pasture Science 70, n.º 9 (2019): 772. http://dx.doi.org/10.1071/cp19147.
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Winter wheat (Triticum aestivum L.) production in the North China Plain (NCP) is threatened by wheat lodging. Therefore, enhancing plant lodging resistance by improving stem quality traits is crucial to maintaining high stable yields of winter wheat. A consecutive 7-year field experiment was conducted to study the effects of stem traits on lodging resistance and the yield of four winter wheat cultivars (Bainong 418, Aikang 58, Wenmai 6 and Zhoumai 18). The results indicated that rainfall is often accompanied by strong winds that can cause lodging in the field. Stalk bending strength and wall thickness of the second internode showed significant negative correlations with lodging index, and a higher lodging index indicated increased lodging risk, which, in turn, could seriously affect the grain yield of wheat. Significant regression relationships were observed between lodging index and population lodging resistance strength, as measured using a crop lodging resistance electronic measuring device. Statistical analysis revealed that yield components and the grain yield of Bainong 418 were higher than those of the other cultivars; there was no significant difference between Bainong 418 and Aikang 58 in lodging index, stalk bending strength or single-stalk and population lodging resistance strengths at anthesis and the middle filling stages, but the mean plant height of Bainong 418 was significantly higher than that of Aikang 58. These results provide a new and reliable method for assessing lodging resistance capacity and indicate that greater lodging resistance, as determined by simultaneously considering plant height and basal stem strength, is an important way to achieve high, stable yield in winter wheat.
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Vavro, M., K. Souček, L. Staš, P. Waclawik, L. Vavro, P. Konicek y J. Ptáček. "Application of alternative methods for determination of rock quality designation (RQD) index: a case study from the Rožná I uranium mine, Strážek Moldanubicum, Bohemian Massif, Czech Republic". Canadian Geotechnical Journal 52, n.º 10 (octubre de 2015): 1466–76. http://dx.doi.org/10.1139/cgj-2014-0377.
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A comparison of rock quality designation (RQD) parameters obtained by drill core analysis and the RQD determined using alternative methods is presented using metamorphic rocks such as migmatized gneisses, migmatites, and amphibolites. Methods of borehole–wall imaging using high-resolution acoustic logging, optical televiewer, and simple video inspection as well as the structural analysis of exploration drift walls oriented subparallel to the analysed boreholes are used for alternatively evaluated RQD values. Results show that, in most cases, the RQD index measured directly on a drill core section reaches lower values (about 10%–30%) than the RQD evaluated by alternative methods. Significant differences in determination of the rock mass failure degree using classical and alternative methods may occur, especially in sections with higher frequency of the metamorphic foliation planes created by biotite-rich bands or by dark-coloured melanosome layers. The nature of biotite itself is favourable for the creation of pre-disposed jointing planes, in which the increased drill core disintegration caused by drilling technology or core handling can occur. Results show it is highly appropriate to make these comparisons on a larger scale and thus verify whether the observed differences affect the qualitative classification of the rock mass.
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Al-Kayiem, Hussain H., Kelly Koh, Tri W. B. Riyadi y Marwan Effendy. "A Comparative Review on Greenery Ecosystems and Their Impacts on Sustainability of Building Environment". Sustainability 12, n.º 20 (15 de octubre de 2020): 8529. http://dx.doi.org/10.3390/su12208529.
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Greenery systems are sustainable ecosystems for buildings. Many studies on greenery systems, such as green roofs and green walls, have demonstrated that greenery systems support energy saving and improve thermal conditions in the building sector. This paper summarizes, discusses, and compares greenery systems and their contributions to the reduction of the urban heat index, the reduction of internal and external buildings’ wall temperatures, and the reduction of the energy consumption of buildings. The fundamental mechanisms of greenery systems, which are thermal insulation, evapotranspiration, and shading effect, are also discussed. The benefits of greenery systems include the improvement of stormwater management, the improvement of air quality, the reduction of sound pollution, the reduction of carbon dioxide, and the improvement of aesthetic building value. The summarized materials on the greenery systems in the article will be a point of references for the researchers, planners, and developers of urban and rural areas, as well as the individual’s interest for future urban and rural plans.
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Lo’ay, A. A., M. M. Rabie, Haifa A. S. Alhaithloul, Suliman M. S. Alghanem, Aly M. Ibrahim, Mohamed A. Abdein y Zinab A. Abdelgawad. "On the Biochemical and Physiological Responses of ‘Crimson Seedless’ Grapes Coated with an Edible Composite of Pectin, Polyphenylene Alcohol, and Salicylic Acid". Horticulturae 7, n.º 11 (15 de noviembre de 2021): 498. http://dx.doi.org/10.3390/horticulturae7110498.
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The ‘Crimson seedless’ grape encountered several difficulties during shelf life, including weight loss, rachis browning, and berry shattering. The effect of exogenous pectin (PE) and polyphenol alcohol (PVA) with supporting salicylic acid (SA) at different concentrations (0, 1, and 2 mM) was applied. The coating was applied to bunches for 5 min and stored at room temperature (26 ± 1 °C and RH 65 ± 3%) for 4 days. In this study, postharvest application of PE + PVA-SA can significantly reduce the cell wall degradation enzyme activities of ‘Crimson seedless’ grape during shelf life. ‘Crimson seedless’ bunches, treated with PE + PVA-SA 2 mmol L−1, had a lowered rachis browning index (RB index), weight loss (WL%), and berry shattering percentage (BS%) and preserved berry color hue angle (ho) compared to untreated bunches during shelf-life duration. Moreover, the PE + PVA-SA 2 mM improved berry firmness (BF) and removal force (BRF). It also improved the soluble solid content (SSC%), titratable acidity (TA%), and SSC: TA-ratio, for assessing berry maturity. The cellular metabolism enzyme activities (CMEAs) of the cell wall such as polygalacturonase (PG), cellulase (CEL), xylanase (XYL), and pectinase (PT) were minimized by applying PE + PVA-SA 2 mM coatings throughout storage duration. The accumulation of malondialdehyde (MDA) and cell wall damage, as well as the electrolyte leakage percentage (EL%), was reduced. PE + PVA-SA 2 mM maintained DPPH radical quenching activities and minimized O2− and H2O2 production rates. Collectively, these findings suggest that PE + PVA with the presence of SA as a coating treatment preserved ‘Crimson seedless’ bunches during shelf life. PE + PVA-SA 2 mM might be at least partially ascribed to the enhancement of bunches’ quality traits as well as inhibiting cell wall damage during the shelf-life period.
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Morgan, Ryan D., Albin John, Brandon Youssi, Shirley McReynolds, Yana Puckett y Catherine Ronaghan. "Stoma Retraction in Super-Morbidly Obese Patient Leading to Class IV Midline Wound: A Cautionary Tale". Journal of Investigative Medicine High Impact Case Reports 10 (enero de 2022): 232470962211411. http://dx.doi.org/10.1177/23247096221141189.
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Stoma creation is often necessary for fecal diversion in general surgery. The creation of stomas involves mobilization of either the large or small intestine through the abdominal wall to allow for the passage of waste that traverses the intestinal tract. Among the complications of stoma creation, particularly in obese patients, is stoma retraction, whereby the stoma retracts greater than 5 mm from the skin. This is often accompanied by extensive dermal dehiscence, which can lead to significant leakage resulting in infection. Here, we present the case of a super-morbidly obese female patient with an end ileostomy following total colectomy in which abdominal closure was not initially achieved. The stoma became retracted and dehisced leading to continued contamination of the open abdomen, necessitating multiple abdominal washouts. Injection of 300 units of botulinum toxin A (BTA) was administered into the abdominal wall muscles later the day of her index operation. An Abdominal Wall Reapproximation Anchor (ABRA) dynamic tissue system (DTS) was utilized successfully in subsequent operations for primary myofascial closure. Heavy continuous contamination of the midline wound through the subcutaneous cleft between the retracted ileostomy and midline surgical wound was treated with intensive wound care, strict bed rest, nothing to eat or drink (NPO), and total parenteral nutrition (TPN). Post-operative stoma complications occur frequently, and stoma retraction is commonly encountered, especially in the obese. The patient presented in this case study had multiple risk factors which led to a complicated treatment course. Successful primary myofascial closure and complete healing of the midline surgical wound highlights the importance of a patient-tailored multimodal approach.
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Saptarini, Opstaria y Ismi Rahmawati. "PENGARUH MINYAK ATSIRI DAUN JERUK PURUT (Citrus hystrix) TERHADAP DINDING SEL BAKTERI Staphylococcus aureus". BERITA BIOLOGI 20, n.º 1 (10 de mayo de 2021): 23–29. http://dx.doi.org/10.14203/beritabiologi.v20i1.3976.
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Kaffir lime leaves essential oil has activity to inhibit bacterial growth. The mechanism of the inhibition is thought to be located in thebacterial cell wall. This study aimed to determine the antibacterial work location of kaffir lime leaf essential oil against Staphylococcus aureus ATCC 25923. Kaffir lime leaves were distilled by steam distillation, essential oils obtained were identified by organoleptic quality, evaporation, solubility in alcohol, refractive index and specific gravity. The results were compared under with the literature. The results of essential oils were made with various concentrations of 100, 50, 25, 12.5, 6.25, 3.13, 1.56, 0.73, 0.39, and 0.20%. The results of the concentration series were tested for antibacterial activity with the macrodilution method followed by the determination for the location of bacterial growth inhibition using the Scanning Electron Microscope (SEM). The yield of kaffir lime leaf essential oil was 0.82%. The observation of organoleptic essential oil has a light yellow color, the distinctive odor of kaffir lime, a liquid form, and distinctive lime taste. Refractive index examination resulted 1.454; specific gravity 0.8317, and soluble in 70% ethanol with a ratio of 1:1. The Minimum BactericidalConcentration (MBC) obtained from the antibacterial activity test was 6.25%. Kaffir lime leaves essential oil mechanism occurred in the cell walls and cell membranes of Staphylococcus aureus.
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Goodsall, T., T. Nguyen, C. Ma, V. Jairath y R. Bryant. "P190 Systematic review: Gastrointestinal ultrasound scoring indices for inflammatory bowel disease". Journal of Crohn's and Colitis 14, Supplement_1 (enero de 2020): S233. http://dx.doi.org/10.1093/ecco-jcc/jjz203.319.
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Abstract Background The management of inflammatory bowel disease (IBD) requires frequent monitoring and assessment of disease activity. Endoscopic assessment with biopsy remains the gold standard for disease activity. Gastrointestinal ultrasound (GIUS) is a non-invasive, accessible and affordable test used to assess and monitor IBD and has been shown to be similar to MRI for detecting disease. The aim of this study was to systematically review the literature to identify scoring indices used for GIUS measurement of disease activity in IBD and to appraise their operating characteristics. Methods A systematic search of Embase, Medline, Pubmed, Cochrane Central and Clinical Trials.gov from inception to July 2019 was conducted according to PRISMA guidelines. Included were all study types reporting GIUS indices used for grading activity of severity of IBD in comparison to an objective reference standard. Studies using an exclusive clinical reference standard were excluded. All study types and abstracts were considered. Study quality was assessed using the QUADAS tool. Results 27 eligible studies were identified investigating 1647 patients. Disease phenotype was Crohn’s disease (CD) (n = 13), ulcerative colitis (UC) (n = 10) and IBD (n = 4). The most common reference standard was colonoscopy (n = 23), histology (n = 2), and imaging (n = 2). Bowel wall thickness was an index parameter in 26 studies. The most frequent cut off was 3mm (n = 10), 4mm (n = 9), 5mm (n = 1), and not specified (n = 6). There was no noticeable difference in magnitude of cut off when stratified by disease phenotype. Colour Doppler was an index parameter in 16 studies and was based on the Limburg score (n = 7), binary (n = 7) or categorical (n = 2). Bowel wall stratification was an index parameter in 15 studies and was more frequently used in UC (70%) and IBD (75%) indices than in CD indices (38%). Other index parameters included bowel wall compressibility, presence of complications such as abscess or fistula, bowel wall echogenicity, mesenteric inflammatory, lymphadenopathy, contrast enhancement, ulceration, peristalsis, strictures, absence of haustra coli, and tissue sonoelastography. Twenty-three studies were identified as at risk of bias. Overall concordance was substantial to excellent and accuracy was good to excellent. Two studies demonstrated substantial inter-observer agreement. No studies reported intra-observer agreement. Conclusion The identified GIUS scoring indices demonstrate applicability to both CD and UC with good accuracy and concordance. Current evidence does not adequately address concerns about the intra- and inter-observer variability of GIUS. There is a need for robust validation of an evidence-based GIUS index before more widespread use in IBD as a surrogate for colonoscopy and in clinical trials.
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Prodeus, Arkadiy y Maryna Didkovska. "Assessment of speech intelligibility in university lecture rooms of different sizes using objective and subjective methods". Eastern-European Journal of Enterprise Technologies 3, n.º 5 (111) (25 de junio de 2021): 47–56. http://dx.doi.org/10.15587/1729-4061.2021.228405.
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The scores of speech intelligibility, obtained using objective and subjective methods for three university lecture rooms of the small, medium, and large sizes with different degrees of filling, were presented. The problem of achieving high speech intelligibility is relevant for both students and university administration, and for architects designing or reconstructing lecture rooms. Speech intelligibility was assessed using binaural room impulse responses which applied an artificial head and non-professional quality audio equipment for measuring. The Speech Transmission Index was an objective measure of speech intelligibility, while the subjective evaluation of speech intelligibility was carried out using the articulation method. Comparative analysis of the effectiveness of parameters of impulse response as a measure of speech intelligibility showed that Early Decay Time exceeded the score of the T30 reverberation time but was ineffective in a small lecture room. The C50 clarity index for all the considered lecture rooms was the most informative. Several patterns determined by the influence of early sound reflections on speech intelligibility were detected. Specifically, it was shown that an increase in the ratio of the energy of early reflections to the energy of direct sound leads to a decrease in speech intelligibility. The exceptions are small, up to 30‒40 cm, distances from the back wall of the room, where speech intelligibility is usually slightly higher than in the middle of the room. At a distance of 0.7–1.7 m from the side walls of the room, speech intelligibility is usually worse for the ear, which is closer to the wall. The usefulness of the obtained results lies in refining the quantitative characteristics of the influence of early reflections of sound on speech intelligibility at different points of lecture rooms.
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Smith, Alexander, Anish K. Amin, Rayan El‐Zein, Sreedhar R. Billakanty y Nagesh Chopra. "Relationship between Surpoint Tag Index, a Radiofrequency Ablation lesion quality indicator, and Atrial wall thickness in Cavotricuspid isthmus Ablations exhibiting bidirectional block". Journal of Arrhythmia 38, n.º 1 (4 de diciembre de 2021): 118–25. http://dx.doi.org/10.1002/joa3.12662.
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Roth, John Scott, Amanda Zachem, Margareta Plymale y Daniel L. Davenport. "Complex Ventral Hernia Repair with Acellular Dermal Matrices: Clinical and Quality of Life Outcomes". American Surgeon 83, n.º 2 (febrero de 2017): 141–47. http://dx.doi.org/10.1177/000313481708300213.
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Acellular dermal matrices (ADMs) are used in conjunction with complex hernia repair, but their efficacy is often debated. This study assesses clinical and quality of life (QOL) outcomes in multiply comorbid patients undergoing complex ventral hernia repair using ADMs. After obtaining institutional review board approval, a prospective study was conducted evaluating patients undergoing complex ventral incisional hernia repair with abdominal wall reconstruction (AWR) using either human (Flex HD) or porcine ADM (Strattice). Patient accrual occurred over three years. Demographics, comorbid conditions, and operative details were recorded. Postoperative two-week, six-week, six-month, and one-year follow-up occurred. Primary outcomes measures include wound occurrence, QOL parameters using the Short Form-12 health survey, and hernia recurrence. Groups were compared using chi-squared, Fisher's exact, Mann-Whitney U, or t tests as appropriate. Significance was set at P < 0.05. Thirty-five patients underwent hernia repair using ADM: mean age = 58 years, mean body mass index = 34 kg/m2, >50 per cent Centers for Disease Control and Prevention Wound Class II and above, >50 per cent recurrent hernia repair, and 25 per cent current or previous mesh infection. Twenty patients (57%) experienced surgical site occurrences, 15 (43%) wound infections, and 5 (14%) recurrences with a median follow-up of one year. All Short Form-12 QOL indicators improved at 12 months compared with baseline (NS). Outcomes were similar between mesh types. In conclusion, abdominal wall reconstruction for complex hernias using biologic materials is safe but has significant morbidity. Wound complications occur in over half of all patients and are not impacted by ADM type. There is no decrement in QOL one year after hernia repair despite associated morbidity.
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Won, Sang-Jae, Jae-Hyun Moon, Henry B. Ajuna, Su-In Choi, Chaw Ei Htwe Maung, Sangtae Lee y Young Sang Ahn. "Biological Control of Leaf Blight Disease Caused by Pestalotiopsis maculans and Growth Promotion of Quercus acutissima Carruth Container Seedlings Using Bacillus velezensis CE 100". International Journal of Molecular Sciences 22, n.º 20 (19 de octubre de 2021): 11296. http://dx.doi.org/10.3390/ijms222011296.
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Leaf blight disease caused by Pestalotiopsismaculans lead to deleterious losses in the quality of forest container seedlings. The use of plant growth-promoting bacteria provides a promising strategy to simultaneously control diseases and enhance forest seedling production. This study investigated the biocontrol of leaf blight disease and growth promotion potential of Bacillus velezensis CE 100 in Quercus acutissima Carruth seedlings. B. velezensis CE 100 produced cell wall degrading enzymes, such as chitinase, β-l,3-glucanase, and protease, which caused cell wall lysis and hyphae deformation of P. maculans, leading to mycelial growth inhibition by 54.94%. Inoculation of B. velezensis CE 100 suppressed P. maculans infection and increased seedling survival rate by 1.6-fold and 1.3-fold compared to chemical fertilizer and control, respectively. In addition, B. velezensis CE 100 produced indole-3-acetic acid, which improved root development and nutrient uptake compared to chemical fertilizer and control. Especially, inoculation with B. velezensis CE 100 increased the total nitrogen content of Q. acutissima seedlings, improved the chlorophyll index in the leaves, and increased seedling biomass by 1.3-fold and 2.2-fold compared to chemical fertilizer and control, respectively. Thus, B. velezensis CE 100 could be applied in the eco-friendly production of high-quality forest seedlings.
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Kwon, Yong-Il. "A Study on the Evaluation of Ventilation Performance According to the Location of the Return Diffusers of an Upward Displacement Ventilation System in a Dome-Shaped Small Concert Hall". International Journal of Air-Conditioning and Refrigeration 27, n.º 03 (septiembre de 2019): 1950028. http://dx.doi.org/10.1142/s2010132519500287.
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The modern people are active in various cultural facilities and enjoy the leisure life. The spectators and performers using a small concert hall generally use this space for about 2[Formula: see text]h in an enclosed state, and so the space should maintain a comfortable thermal environment and indoor air quality. The ventilation systems that can be applied to small concert hall are generally classified as the mixing ventilation system and the displacement ventilation system, but the upward displacement ventilation system is known to be able to maintain the clean indoor air quality with high energy efficiency. The upward displacement ventilation system installed in a dome-shaped small concert hall is not limited in the height of the vertical wall. Therefore, it is necessary to evaluate the optimal height of the return diffuser by utilizing the ventilation performance and the air diffusion performance index (ADPI). This study was carried out to evaluate the effect of the return diffuser position on the ventilation performance of an upward displacement ventilation system installed in a dome-shaped small concert hall. It was confirmed that as the height at which the return diffuser is installed on the vertical wall increases, the ventilation efficiency increases and the thermal stratification formed in the upper area is significantly reduced.
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AL-Saedi, Zainab Zamil y Jathwa Abdul Kareem Ibrahim. "Aerobic Municipal Solid Waste Compost Quality According to Different Layers of Composting Bioreactor". Association of Arab Universities Journal of Engineering Sciences 26, n.º 3 (31 de agosto de 2019): 7–16. http://dx.doi.org/10.33261/jaaru.2019.26.3.002.
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Composting is one of the methods of solid waste management (SWM) where the organic component of solid waste stream is biologically decomposed under controlled conditions. A bioreactor tank was designed to contain 59.2 kg of mixed organic municipal solid waste, the organic matter was degraded under aerobic condition for 30 days. The tank was 45 cm in diameter, 130 cm total height and a 0.2 cm wall thickness. Three circular openings with screwed cover having diameter of 12 cm were leveled at (20, 40 and 80) cm respectively to withdraw samples. Temperature, moisture and pH were measured for three layers as process guideline indicators. Maximum temperature ranged between (34.79 to 46.91) ºC. Initial pH value was 6.53, ended within a range of (7.4 to 7.44). Chemical analysis for the composts in the three levels proved that the final C/N ratio ranged between (13.8 to16.1), TOC ended within a range of (17.33% to 25.24 %), final nitrification index (N-NH4/N-NO3) ranged between (0.22 to0.31), final of P% ranged between (0.89% to 1.23%), final of K% ranged between (1.69% to 1.81%) and results of germination index (GI %) ranged between (76.54%, to 88.35%) for three layers respectively. At the close of the experiment results proved that aerobic in-vessel composting could reduce the large amounts of wastes by 40% as a total mass. A satisfactory degree of decomposition was apparent in all levels, and the material was characterized by a pleasant earthy odor, and the obtained compost can be classified as mature compost. In conclusion, the three different layers do not have much effect on the quality indices of the final product.
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Psota, Vratislav, Marián Svorad, Markéta Musilová y Veronika Halásová. "Barley varieties registered in the Slovak Republic after the harvest of 2019". KVASNY PRUMYSL 66, n.º 2 (31 de marzo de 2020): 255–60. http://dx.doi.org/10.18832/kp2019.66.255.
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This study presents the results of malting quality and agronomic characters obtained within state varietal testsof malting barley in the Slovak Republic. After the harvest of 2019, new spring malting barley varieties of Avus,Bernet, and LG Nabuco were registered. The spring barley varieties provided malt with extract content above 83%. All varieties degraded nitrogenous substances easily. The values of Kolbach index ranged from 47.5 to 49.5%. Diastatic power was at the optimal level and moved above the level of 300 WK un. in all the studied varieties. Also, cell wall degradation was optimal and friability was higher than 90%. Content of β-glucans in wort reached favourable values (72–141 mg/l). Quality of wort characterized by apparent final attenuation was at the above average value to the optimal level (81–81.8%) in the studied spring barley varieties.
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Conceição, Eusébio, João Gomes, M. Manuela Lúcio, M. Inês Conceição, André Ramos y Hazim Awbi. "Coupling of differential CFD and integral human thermophysiology numerical models applied in indoor ventilated spaces". E3S Web of Conferences 321 (2021): 03002. http://dx.doi.org/10.1051/e3sconf/202132103002.
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This work presents the development of the coupling of differential Computer Fluid Dynamics and integral human thermo-physiology numerical models applied in indoor ventilated spaces. The study is performed in a virtual chamber, similar to an existing experimental chamber, with dimensions of 4.50×2.55×2.50 m3. The chamber, occupied with twelve virtual manikins, is equipped with six tables, twelve chairs, one exhaust system and one inlet system, based on confluents jets system. In the exhaust system, they are considered six air ducts, located above the head level, connected to the ceiling area. The inlet system, based in four vertical ducts, with 0.15 m diameter, located on the corners of the chamber, is equipped with consecutive holes, that promotes horizontal jets near the wall. The results demonstrate that when the airflow rate increases the air quality number increases, the thermal comfort number decreases, and the Air Diffusion Index increases slightly. The predicted percentage of dissatisfied index values show that the thermal comfort level of occupants is acceptable, the dioxide carbon concentration values show that the indoor air quality is near the acceptable value and the Draught Risk is acceptable.
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& et al., Aree. "SOME OF PHENOTYPIC, PHYSICAL AND ANATOMICAL WOOD PROPERTIES OF VALONIA OAK TREES IN KURDISTAN-IRAQ". IRAQI JOURNAL OF AGRICULTURAL SCIENCES 52, n.º 3 (20 de junio de 2021): 589–600. http://dx.doi.org/10.36103/ijas.v52i3.1348.
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This study was aimed to investigate the morphologic, macroscopic, and microscopic description with the paper pulp quality index was determined to facilitate its increased use and to analyze the variation of wood properties. Among different morphological characteristics Q. aegilops registered mean height (13.63 m) and diameter (26.04 cm), while bark thickness represented from 7.2 to 15.6mm. Average bark and wood percent was noticed (8.22%) and (91.78%) of the total volume, with annual ring growth width (3.17mm) that considered a slow-growing species. The highest heartwood proportion of stem volume was 75.32% and the lowest 42.01% with a mean of 61.46%. The sapwood proportion ranged between 23.68 and 57.99% with a mean of 38.54%. While the values of anatomical properties were: The mean values of fiber length, fiber diameter, double cell wall thickness, and fiber lumen width were 1.01mm, 15.54µm, 6.288µm, and 9.25µm respectively. Moreover, the mean values of vessel length and vessel diameters were 0.54mm and 179.80µm respectively. Significant differences were found in the pulpwood quality indices for the paper samples, the means value of the runkel index was 0.86, while, slenderness index was 68.84, the coefficient of flexibility was 0.57, and the average value of the stiffness coefficient was 0.421. The fibers length more than1mm and cell well is thick accordingly are classified as good for paper. Based on its morphological and physical properties, Q. aegilops wood can be used in various wood manufactures. Based on the anatomical properties and pulp quality indices, this wood could be used to obtain cellulose pulp for paper production.
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Day, Molly, Kayla Seiffert, Qiang An, Christopher Larson y Robert Westermann. "The Severity of Acetabular Retroversion Does Not Influence Outcomes of Arthroscopic Management of FAI". Orthopaedic Journal of Sports Medicine 9, n.º 7_suppl4 (1 de julio de 2021): 2325967121S0022. http://dx.doi.org/10.1177/2325967121s00228.
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Objectives: Controversy exists regarding optimal treatment of FAI in the setting of acetabular retroversion. The purpose of this study was to investigate changes in pain and function among patients with acetabular retroversion treated with hip arthroscopy. Secondarily, to assess if the severity of posterior wall deficiency influences post-operative outcomes following hip arthroscopy. Methods: A retrospective review of patients with acetabular retroversion with hip arthroscopic surgery at a single institution was performed. Acetabular retroversion was defined by three radiographic criteria: the presence of crossover sign, ischial spine sign, and posterior wall sign. Anteroposterior radiographs were used to measure lateral center edge angle (LCEA), Tonnis grade, anterior wall index (AWI) and posterior wall index (PWI), and alpha angle. Patient-reported outcome (PROs) included modified Harris Hip Score (MHHS), visual analog scale (VAS) and quality of life with Veterans RAND-12 (VR-12). Spearman correlation coefficients were used to determine correlation of PWI with pre- and post-PROs. Multivariate analysis was performed and generalized estimating equation was used to determine independent predictors for outcome scores. Significance was set at p<0.05. Results: Between 2013 and 2019, 138 patients with FAI and acetabular retroversion underwent hip arthroscopy, 67% were female. The average follow-up was 29 months, with minimum of 6 months. Average preoperative LCEA 28, alpha angle 70.1, postoperative alpha angle 44.6 (p<0.05). All PROs demonstrated significant improvement from preoperative baseline to follow-up scores (MHHS (59.5 +/- 14.7 vs 80.8 +/- 18.8), VAS (6.3 +/- 1.7 vs 3.0 +/- 2.7), p<0.0001). Four patients (3%) underwent revision procedures. Upon multivariate analysis, no association between PWI and PROs was not found. Preoperative mHHS was the strongest predictor of clinical outcome. Conclusions: This is the largest study of patients with acetabular retroversion assessing for a correlation between PWI on patient-reported outcomes following arthroscopic management of FAI. In patients with acetabular retroversion, outcomes are good following arthroscopic management with low complication and revision rate following hip arthroscopy. Posterior wall deficiency was not a predictor of poor outcome in patients with acetabular retroversion. In this single surgeon selected series, the severity of retroversion (measured by PWI) does not appear to have a threshold or any correlation with postoperative outcomes in following FAI treatment.
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Kalebota, N., M. Milošević, N. Laktašić Žerjavić, A. Andreić, B. Končar, M. Vedriš, P. Turković et al. "AB1262 EFFECTS OF TAI CHI EXERCISE ON PAIN, FUNCTIONAL STATUS AND QUALITY OF LIFE IN PEOPLE WITH OSTEOARTHRITIS AND INFLAMMATORY ARTHRITIS". Annals of the Rheumatic Diseases 79, Suppl 1 (junio de 2020): 1922.1–1923. http://dx.doi.org/10.1136/annrheumdis-2020-eular.5843.
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Background:Tai Chi as a type of physical activity (PA) is included in recommendations for PA in people with inflammatory arthritis (IA) and osteoarthritis (OA).1Objectives:The aim of this study was to evaluate the effect of Tai Chi exercise program on pain, functional status and quality of life in people with OA and IA.Methods:A study co-funded by the Erasmus + European Union Program for Sporting Activities called #WushuElixir was conducted in Croatia, Slovenia, Belgium and Spain. We present the results of the research conducted in Croatia from October 2018 to April 2019. A total of 44 participants (Pts) entered the Tai Chi exercise program. Majority of Pts were female with OA (Table 1). Tai Chi exercise program was performed for 60 minutes, twice a week, with a total of 50 training sessions. In data analysis where included only those Pts who completed at least 36% of exercise program, a total of 28 (63.6%) Pts, out of which 24 (85.7%) completed at least 70% of exercise program. An average attendance was 39 (78%) sessions. Outcome measures were: pain (VAS scale), stability and balance (Functional reach test; FRT), chest mobility (breathing index), spinal mobility (cervical and thoracic sagittal indices and Schober’s test), muscle strength (Wall sit test), physical function (Lequesne Index of severity for OA of the hip, and Stanford Health Assessment Questionnaire (HAQ) 20-Item for IA) and quality of life (15D© The health-related quality of life instrument; 15D QL). For statistical analysis t-test for paired samples was used with statistical significance set on P<0.05.Table 1.Descriptive statistics of participantsN%GenderMale414.3%Female2485.7%Age groups≤45 years310.7%46-60 years932.1%61-70 years1139.3%≥71 years517.9%DiagnosisOsteoarthritis of the spine, hip and knee1967.9%Inflammatory arthritis517.9%Other414.3%Results:There was significant improvement in breathing index (P<0.001), sagittal mobility of cervical (P<0,001) and thoracic spine (P=0.007), Schober’s test (P<0,001), Wall sit test (P=0.042), 15D QL (P=0.048) and Lequesne index (P=0.030). There were no significant changes in VAS pain level (P=0.651), FRT value (P=0.442) and Stanford HAQ-20 scale result (P=0.186).Conclusion:Tai Chi can improve functional status and quality of life in people with OA and IA.References:[1]Rausch Osthoff AK, Niedermann K, Braun J, et al. 2018 EULAR recommendations for physical activity in people with inflammatory arthritis and osteoarthritis. Ann Rheum Dis. 2018;77(9):1251-1260.Acknowledgments:Goran Pažin, Tatjana Božac, Damir Grbac, Kristina Spajić, Ana Karić.Disclosure of Interests:Nataša Kalebota Speakers bureau: Krka, Milan Milošević: None declared, Nadica Laktašić Žerjavić Speakers bureau: Abbvie., Roche, MSD, Eli Lilly, Pfizer, Mylan, Amgen, Fresenius Kabi, Antun Andreić: None declared, Biljana Končar: None declared, Mladen Vedriš: None declared, Petar Turković: None declared, Nikolino Žura: None declared, Kristina Kovač Durmiš Speakers bureau: Abbvie, Fresenius Kabi, Iva Žagar Speakers bureau: Abbvie. Roche, MSD, Eli Lilly, Pfizer, Porin Perić: None declared
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Wu, Lian Sheng, Guang Li Li y Qi Fu. "The Study of Design and Installation Process for Supersonic Nozzle". Advanced Materials Research 569 (septiembre de 2012): 500–503. http://dx.doi.org/10.4028/www.scientific.net/amr.569.500.
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A practical optimal design method of supersonic nozzle is proposed for a supersonic wind tunnel’s design. Design a set of nozzle wall lines with the same nozzle length and different Mach numbers 1.5, 2.0, 2.5. Use numerical simulation method for the verify and analysis of the designed nozzle. Mainly study the impact of the installation gradient between nozzle and test section on flow field quality. This wind tunnel is the subsonic, transonic and supersonic wind tunnel and its test section cross is 0.2 m × 0.2 m .The impact on flow field quality of the test section was studied quantitatively by using the numerical simulation method. The installation gradient index was given. It has some practical value to the construction of supersonic wind tunnel. At present, this study has been applied in construction of the wind tunnel. The gradient of the test section import shall not be greater than 0.5 mm.
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Weltz, Adam S., Udai S. Sibia, H. Reza Zahiri, Alexa Schoeneborn, Adrian Park y Igor Belyansky. "Operative Outcomes after Open Abdominal Wall Reconstruction with Retromuscular Mesh Fixation Using Fibrin Glue versus Transfascial Sutures". American Surgeon 83, n.º 9 (septiembre de 2017): 937–42. http://dx.doi.org/10.1177/000313481708300928.
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Ideal fixation techniques have not been fully elucidated at the time of complex open abdominal wall reconstruction (AWR). We compared operative outcomes and quality of life with retromuscular mesh fixation using fibrin glue (FG) versus transfascial sutures (TS). Retrospective review identified complex hernia patients who underwent open AWR with mesh from November 2012 through April 2016. Multivariate analysis examined postoperative outcomes between groups. Quality of life was assessed using the Carolinas Comfort Scale. Seventy-five patients (18 FG vs 57 TS) with mean age (54.3 vs 53.9 years, P = 0.914), body mass index (35.8 vs 34.7 kg/m2, P = 0.623) and American Society of Anesthesiologist score (2.6 vs 2.5, P = 0.617) were reviewed. No differences in wound (P = 0.072) and nonwound (P = 0.639) related complications were noted between groups. Risk of reoperations (P = 0.275) and 30-day readmissions (P = 0.137) were also comparable. The TS group was twelve times more likely to report pain at six-month follow-up compared with FG (12.29 OR, 95 per cent confidence interval 1.26–120.35, P = 0.031). No hernia recurrences were noted in either group at a mean follow-up of 390 ± 330 days. The use of FG to secure mesh in the retromuscular space during complex open AWR may be a safe alternative to penetrating transfascial fixation with potential to reduce chronic pain.
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Ginsberg, Jill P., Avital Cnaan, Huaqing Zhao, Bernard J. Clark, Stephen M. Paridon, Alvin J. Chin, Jack Rychik et al. "Using Health-Related Quality of Life Measures to Predict Cardiac Function in Survivors Exposed to Anthracyclines". Journal of Clinical Oncology 22, n.º 15 (1 de agosto de 2004): 3149–55. http://dx.doi.org/10.1200/jco.2004.01.047.
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Purpose As the number of pediatric cancer survivors increases, so does the number of survivors previously exposed to anthracyclines as part of their cancer therapy. Because screening is costly, some have suggested that health-related quality of life (HRQL) measures might be useful in focusing screening tests on those patients with cases most likely to display positive findings. This study reports on the predictive ability of HRQL measures to detect patients with abnormalities on serial cardiac testing. Methods Using 127 patients from the ACE-Inhibitor after Anthracycline (AAA) Trial, this study compared serial measures of the Short Form-36 (SF-36; for ages > 13 years) and Child Health Questionnaire-Child Form 87 (CHQ-CF87; for ages ≤ 13 years) to serial cardiac performance tests including echocardiographic shortening fraction, left ventricular end systolic wall stress (LVESWS), LVESWS-index, and maximal cardiac index (MCI; a measure of cardiac output at peak exercise). Results Generally, there was no clinically or statistically significant correlation between any HRQL measure and any cardiac function measure except between MCI and vitality and physical functioning. For each of these measures, the correlation between MCI was statistically significant (P < .006), but each HRQL subscale could explain no more than 7% of the variation in MCI. HRQL measures were not predictive of any other cardiac function measure. Conclusion HRQL measures should not be used in isolation as a screen for cardiac function abnormalities in patients exposed to anthracylines who already have a mild degree of ventricular dysfunction. Patient history appears to be no substitute for cardiac testing in this cohort.
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Wu, Chun, Zhiyong Duan, Jin Shu y Yajuan Li. "Cardiac Magnetic Resonance Assessment of the Protective Effect of Remote Ischemic Postconditioning on Coronary Microcirculation after Reperfusion Therapy for Acute ST-Segment Elevation Myocardial Infarction". Computational and Mathematical Methods in Medicine 2022 (5 de julio de 2022): 1–9. http://dx.doi.org/10.1155/2022/5629763.
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This study intends to evaluate the characteristics of coronary microcirculatory function in patients with myocardial infarction undergoing reperfusion and its predictive value in assessing cardiac function, myocardial activity, recovery of ventricular wall motion after infarction, and distant myocardial remodeling by cardiac magnetic resonance technique (CMRI). Materials and Methods. The 293 cases of patients with myocardial infarction treated in our hospital from August 2017 to August 2021 were selected as the subjects of this retrospective study, 13 cases were shed due to transfer and moving, and the rest were divided into 140 cases each in the emergency and elective groups according to emergency percutaneous coronary intervention (PCI) and elective PCI. The patients’ myocardial infarct volume ventricular volume, microcirculatory obstruction volume ventricular volume, microcirculatory obstruction volume/myocardial infarct volume, and LVEF, combined with BP and troponin T, were analysed by CMR for comparative analysis, hemodynamic, and cardiac function index differences. Results. The hemodynamics (CO, CI, SV, SI, LVSW1, and LCW) measured at different times were significantly different between the two groups; patients in the emergency group had significantly lower EDV and ESV than the elective group at 7-10 d postoperatively; and EDV, ESV, and LVEF improved in both groups after 3 months, while EDV, ESV, and LVEF improved significantly better in the emergency group than in the elective group, and the difference was statistically significant ( P < 0.05 ). The myocardial infarct quality, VSM score, and ventricular wall motion abnormality score were significantly lower in the emergency group than in the elective group from 7 to 10 d after PCI; myocardial infarct quality, VSM score, and ventricular wall motion abnormality score improved in both groups at 3 months after PCI; and the degree of improvement of myocardial infarct quality and VSM score was significantly better in the emergency group than in the elective group ( P < 0.05 ). Conclusion. Acute myocardial infarction patients with significant effect of emergency PCI treatment can be on their postmyocardial infarction left ventricular function, and in the treatment of coronary heart disease, myocardial infarction diagnosis has a certain reference value.