scholarly journals Calculations of compressed rods considering experiments over last 100 years

2021 ◽  
Vol 263 ◽  
pp. 02049
Author(s):  
Denis Konin
Keyword(s):  
Bearing Capacity ◽  
Ultimate Load ◽  
Compressive Load ◽  
Cost Effective ◽  
Test Results ◽  
Fe Modelling ◽  
The Past ◽  
Wide Range ◽  
Line Diagram ◽  
Design Cost

The article presents the results of testing and FE-modelling of rods calculated for the central and eccentric compressive load. More than 600 tests have been analysed over the past 100 years, including made by author, in a wide range of slenderness made of steels with a yield strength of up to 1000 MPa. It is established that the existing Russian calculation methods allow us to accurately determine the bearing capacity of the rod for steel of any strength. Verification of calculation method was carried out not only by stresses and ultimate load-bearing capacity, but also by the deformations of the tested rods. It is established that for H-beams and thin- walled pipes, clarification of the design codes is required to be able to design cost-effective designs, since the code formulas give a margin. This is especially true for elements of low flexibility with small eccentricities. To clarify the codes, a method for modelling a three-line diagram of steel operation, verified with the test results, is proposed.

Diarrheal Disease in the Hospitalized Patient

1986 ◽  
Vol 7 (12) ◽  
pp. 607-609 ◽  
Author(s):  
Peter H. Gilligan
Keyword(s):  
Escherichia Coli ◽  
Clostridium Difficile ◽  
Diarrheal Disease ◽  
Cost Effective ◽  
Etiologic Agent ◽  
The Past ◽  
Wet Mount ◽  
Etiologic Agents ◽  
Wide Range ◽  
Hospitalized Patient

In the past 15 years, our knowledge of the pathogenesis and etiologic agents of diarrheal disease has expanded rapidly. No longer is it scientifically appropriate or cost effective for the laboratory simply to culture a stool for Salmonella and Shigella and to do a wet mount for amebae. Today we have a plethora of agents including, but not limited to, Campylobacter, Yersinia, Clostridium difficile, Escherichia coli, Aeromonas, Plesiomonas, vibrios, rotavirus, Norwalk agent, Giardia, and Cryptosporidium, which have all been suggested to be agents of diarrheal disease. Given such a wide range of possibilities, what approaches should be taken to determine the etiologic agent of diarrheal disease in the hospitalized patient in an era of cost containment?

scholarly journals CURCUMIN – THE HEALING HERB: PROPERTIES AND FUTURE PROSPECTIVE

2019 ◽  
pp. 4-9
Author(s):  
GAURAV SHARMA ◽  
NITIKA THAKUR
Keyword(s):  
High Performance ◽  
Cost Effective ◽  
Bioactive Compound ◽  
Liquid Chromatography Mass Spectrometry ◽  
The Past ◽  
Cultivation Period ◽  
Wide Range ◽  
The World ◽  
Anti Oxidant ◽  
Wonder Drug

Curcumin, the main bioactive compound found in turmeric rhizomes, has a wide variety of applications in the clinical field that is why it attracts researchers from all over the world. While there are various studies on curcumin extraction and quantification, comparison of curcumin content according to the soil profile and cultivation period has not been performed yet in our knowledge. Curcumin to be a genuine natural product having impressive anti-oxidant and anti-inflammatory properties, treating a wide range of diseases. Curcumin is a special gift to humans given by mother-nature to help them curing many diseases. Turmeric, the plant containing a significant amount of this molecule, has been used for many centuries as a traditional medicine to cure skin problems, digestive issues, as painkiller, and much more. From the past two centuries, scientists found many applications of this molecule in the clinical field. There are still many properties of this wonder drug that need to be discovered. However, the obstacle in this track is difficulty in extracting the pure and high amounts of curcumin from turmeric rhizomes. For this reason, many researchers have searched about many techniques to extract curcumin from turmeric rhizomes, of which ultra-high-performance liquid chromatography-mass spectrometry has been found very efficient. The review will assist the researchers to discover and choose the plant to develop adequate medicine for establishing cost-effective treatments.

scholarly journals Detection of sulfamethazine in water, milk and pig manure by dipstick immunoassay

2008 ◽  
Vol 52 (No. 10) ◽  
pp. 445-450 ◽  
Author(s):  
V.B. Kandimalla ◽  
N. Kandimalla ◽  
K. Hruska ◽  
M. Franek
Keyword(s):  
Cost Effective ◽  
Food Samples ◽  
Pig Manure ◽  
Screening Methods ◽  
Test Results ◽  
Visual Measurement ◽  
The Past ◽  
Colour Development ◽  
Control Spot ◽  
Simple Screening

During the past few years, there has been an increasing interest in rapid visual tests that could be performed outside the laboratory, for example on farms, in store houses or in food production plants. Hence, cost effective and simple screening methods are required for residual analysis of environmental and food samples on-site. Here, a simple and instrumental independent dipstick immunoassay for sulfamethazine detection is described. The polyclonal antibody was optimised in terms of coating dilution on a nitrocellulose membrane, dilution of peroxidase tracer conjugate, blocking agents and incubation times. Test results assessed by visual measurement can be available within 20 minutes. In buffer, water, skimmed milk and pig manure extract, sulfamethazine fortified at 50 and 100 µg/l has exhibited clear visual differentiation in colour development (lower intensity) in comparison to the control spot intensity (high intensity) of the dipstick.

scholarly journals Prenatal diagnostics of aninborndefects

2014 ◽  
Vol 8 (1) ◽  
pp. 26-29
Author(s):  
ANNA WOJTYŁKO– GOŁOWKIN ◽  
MACIEJ BAGŁAJ ◽  
ALEKSANDER WOJTYŁKO
Keyword(s):  
Pregnant Women ◽  
Surgical Intervention ◽  
Prenatal Testing ◽  
In Utero ◽  
Test Results ◽  
Past Medical History ◽  
The Past ◽  
Wide Range ◽  
The Moment ◽  
Inborn Defect

Prenatal diagnosis offers a wide range of tests that can be carried out at various stages of pregnancy in order to conduct early diagnosis of congenital malformations. The purpose of this publication is to discuss the methodology, suitability and availability of prenatal testing. The detection of anatomical abnormalities in utero and postnatal verification of the diagnosis decreases the risk associated with malformation in a significant way. Prenatal detection of the defect requiring the surgical intervention on the first days of the life is particularly important. Intrauterine diagnosing of the defect allows to implement the diagnostic and healing progression at the newborn directly after the birth. Transport in utero is the safest way of transmitting the child to the high- specialistic centre . The consultative team looking after the mother and the newborn with an inborn defect should be composed of specialists from obstetrics, neonatology, pediatrics, anesthesiology, pediatric surgery and genetics. In the case of prenatal suspicion or detection of the defects that are possible to surgically repair, it seems appropriate to incorporate a pediatric surgeon to the therapeutic team in the moment of detection in the prenatal period. According to the Polish Gynecological Association it is recommended for every pregnant woman to have an ultrasound scan of the foetus at least 3 times during pregnancy. Minimally invasive screening is destined to all pregnant women in Poland, irrespective of the age. Invading examinations are proposed in case of the positive screening (presence of genetic sonographic marker or wrong biochemical test results) or for pregnant women with the past medical history and at the age above 35.

scholarly journals Behavior of Hollow Thin Welded Tubes Filled with Sand Slag Concrete

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Noureddine Ferhoune ◽  
Meriem Senani ◽  
Abdelhamid Guettala
Keyword(s):  
Bearing Capacity ◽  
Local Buckling ◽  
Compressive Load ◽  
Considerable Effect ◽  
Test Results ◽  
Eccentric Load ◽  
Natural Sand ◽  
Composite Columns ◽  
Ordinary Concrete ◽  
Steel Section

This paper presents the axial bearing capacity of thin welded rectangular steel stubs filled with concrete sand. A series of tests was conducted to study the behavior of short composite columns under axial compressive load; the cross section dimensions were 100 × 70 × 2 mm. A total of 20 stubs have been tested, as follows: 4 hollow thin welded tubes were tested to axial and eccentric load compression, 4 were filled with ordinary concrete appointed by BO columns, 6 were filled with concrete whose natural sand was completely substituted by a crystallized sand slag designated in this paper by BSI, and 6 were tucked in concrete whose natural sand was partially replaced by a crystallized sand slag called BSII. The main parameters studied are the height of the specimen (300 mm–500 mm), eccentricity of load and type of filling concrete. Based on test results obtained, it is confirmed that the length of the tubes has a considerable effect on the bearing capacity and the failure mode. In all test tubes, fracture occurred by the convex local buckling of steel section due to the outward thrust of the concrete; it was observed that the sand concrete improves the bearing capacity of tubes compounds compared to those filled with ordinary concrete.

scholarly journals Numerical Study on Uniaxial Compression Behavior of Geobags

2019 ◽  
Vol 8 (4) ◽  
pp. 137-148
Author(s):  
N. Hataf ◽  
M. Javahery
Keyword(s):  
Bearing Capacity ◽  
Coastal Erosion ◽  
Mechanical Characteristics ◽  
Numerical Study ◽  
Load Capacity ◽  
Computer Software ◽  
Compressive Load ◽  
Friction Angle ◽  
Test Results ◽  
Compression Behavior

Geobags have been used as coastal erosion control and flood preventing measures during the last decades. More recently engineers have used geobags to improve the bearing capacity of soft soils. In this paper, a study was performed to investigate the behavior of geobags under compression loadings utilizing a finite element computer software. The numerical modeling was verified by simulating reported laboratory compression test results. The effects of various parameters such as geobag’s dimensions, mechanical characteristics of filling soil and bag material properties on the ultimate bearing capacity of geobags were investigated. It was shown that increasing the friction angle of filling soil and the tensile strength of textile lead to an increase in the geobag ultimate compressive load capacity. On the other hand, an increase in dilation angle of filling soil, Poisson's ratio and the height of geobag lead to a decrease in the ultimate compressive load capacity of geobags.

Experimental Research on the Strengthening of RC Columns by High Performance Ferrocement Laminates

2011 ◽  
Vol 243-249 ◽  
pp. 1409-1415 ◽  
Author(s):  
Long Min Jiang ◽  
Fan Hua Tang ◽  
Man Li Ou
Keyword(s):  
Bearing Capacity ◽  
High Performance ◽  
Ultimate Load ◽  
Strengthening Effect ◽  
Test Results ◽  
Load Bearing Capacity ◽  
Rc Columns ◽  
Cracking Behavior ◽  
Load Bearing ◽  
Better Than

Eleven approximate full-size specimens including nine eccentrically compressed columns of monotonic loading and two axially compressed columns of laterally cyclic loading were tested. By a series of comparison experiment of specimens strengthened by high performance ferrocement laminates (HPFL) and no strengthened specimens, it was found that the RC columns strengthened with attached HPFL demonstrated greater degree of improving in load-bearing capacity, in which the carrying capacity increment of the strengthened eccentrically compressed columns with lesser eccentricity was greater than that of the same type of columns with bigger eccentricity under the same strengthening conditions; the strengthening effects of the specimens with lower concrete grade are better than that of those ones with higher concrete grade; the ductility and energy dissipation ability of the strengthened columns were remarkably increased. In this paper, the test results is described, the principle and regularity that this category of strengthening laminate improved the ultimate load-bearing capacity, ductility, cracking behavior and mode of failure etc. of the RC columns are analyzed. The studying results proved that this strengthening measure for RC columns is superior to make the strengthening effect notable, working behavior of strengthened column excellent, strengthening construction easy and economical.

Experimental Study on the Axial Behaviour of Cold-Formed Thin-Walled Steel Framing Wall Studs

2011 ◽  
Vol 194-196 ◽  
pp. 1858-1863
Author(s):  
Yu Shi ◽  
Xu Hong Zhou ◽  
Xiao Li Yuan ◽  
Shao Feng Nie
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Ultimate Load ◽  
Oriented Strand Board ◽  
Load Carrying Capacity ◽  
Test Results ◽  
Steel Framing ◽  
Load Carrying ◽  
Axial Behavior ◽  
Thin Walled

A full-scale experimental study on the axial behavior of cold-formed thin-walled steel framing wall studs is presented. The influence of parameters, including whether the studs are sheathed or not, sheathing materials, the screws spacing and the studs spacing, on the bearing capacity of studs under vertical compression is analyzed by the test. The test results of the six wall specimens show that: the load carrying capacity of a stud increases significantly when it is covered with sheathings; the ultimate load of the stud sheathed with fiber reinforced calcium silicate board(CSB) is about 18.8 percent higher than that sheathed with oriented strand board(OSB); when the wall frames are sheathed with OSB or plasterboard, the change of screws spacing has little effect on the bearing capacity, however, the bearing capacity of CSB-sheathed wall stud will fall when the screws spacing decreases from 300mm to 150mm; when the studs spacing increases, the bearing capacity of stud decreases slightly.

Optical Properties of HVEM Accelerators

1975 ◽  
Vol 33 ◽  
pp. 180-181
Author(s):  
A. Strojnik ◽  
J.W. Scholl ◽  
V. Bevc
Keyword(s):  
Optical Properties ◽  
Electron Accelerator ◽  
Systematic Investigation ◽  
Electron Source ◽  
High Brightness ◽  
The Past ◽  
Wide Range ◽  
Optical Behavior

The electron accelerator, as inserted between the electron source (injector) and the imaging column of the HVEM, is usually a strong lens and should be optimized in order to ensure high brightness over a wide range of accelerating voltages and illuminating conditions. This is especially true in the case of the STEM where the brightness directly determines the highest resolution attainable. In the past, the optical behavior of accelerators was usually determined for a particular configuration. During the development of the accelerator for the Arizona 1 MEV STEM, systematic investigation was made of the major optical properties for a variety of electrode configurations, number of stages N, accelerating voltages, 1 and 10 MEV, and a range of injection voltages ϕ0 = 1, 3, 10, 30, 100, 300 kV).

Pursuit of the Abscopal Effect

2020 ◽  
Vol 04 (04) ◽  
pp. 369-372
Author(s):  
Paul B. Romesser ◽  
Christopher H. Crane
Keyword(s):  
Tumor Immunology ◽  
Antitumor Immunity ◽  
Clinical Success ◽  
Immune Recognition ◽  
Immune Modulators ◽  
Cancer Subtypes ◽  
The Past ◽  
Tumor Irradiation ◽  
Wide Range ◽  
Tumor Recognition

AbstractEvasion of immune recognition is a hallmark of cancer that facilitates tumorigenesis, maintenance, and progression. Systemic immune activation can incite tumor recognition and stimulate potent antitumor responses. While the concept of antitumor immunity is not new, there is renewed interest in tumor immunology given the clinical success of immune modulators in a wide range of cancer subtypes over the past decade. One particularly interesting, yet exceedingly rare phenomenon, is the abscopal response, characterized by a potent systemic antitumor response following localized tumor irradiation presumably attributed to reactivation of antitumor immunity.

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