Predicting the Skid Resistance of Bituminous Pavements Through Accelerated Laboratory Testing of Aggregates

2009 ◽  
pp. 61-61-16 ◽  
Author(s):  
KT Diringer ◽  
RT Barros
Keyword(s):  
Laboratory Testing ◽  
Skid Resistance ◽  
Bituminous Pavements

Determination of Textural Depth for Stone Matrix Asphalt

2013 ◽  
Vol 303-306 ◽  
pp. 2589-2592 ◽  
Author(s):  
Arshad Hussain ◽  
Yan Jun Qiu ◽  
Chang Fa Ai
Keyword(s):  
Water Absorption ◽  
Laboratory Testing ◽  
Skid Resistance ◽  
Stone Matrix Asphalt ◽  
Good Surface ◽  
Resistance Performance ◽  
Stone Matrix

Stone Matrix Asphalt (SMA) is regularly and successfully used for surface courses in many countries. In this study SMA was designed using two different local aggregates blending ratios. The aggregate blends were tested for density, abrasion, crushing, water absorption and polishing before used in SMA design. Laboratory testing of the SMA surface mixtures was performed to determine volumetric and mixture specific characteristics. The results and analysis determined that SMA is a good surface meeting the design demands. All mixtures were tested for textural depth and skid resistance performance. It was concluded from this study that different aggregate blending can significantly alter the SMA mixture properties. The limestone and basalt blends can be successfully used to design an anti-slide SMA surface course.

Assessing Sexual Dysfunction, Part 1: Male Sexual Dysfunction

2016 ◽  
Vol 21 (2) ◽  
pp. 3-8
Author(s):  
Seth D. Cohen ◽  
Steven Mandel ◽  
David B. Samadi
Keyword(s):  
Sexual Dysfunction ◽  
Health Care Professionals ◽  
Laboratory Testing ◽  
Aging Male ◽  
Testosterone Deficiency ◽  
Subjective Complaint ◽  
Validated Questionnaire ◽  
Male Sexual Dysfunction ◽  
Multiple Health

Abstract To properly assess men and women with sexual dysfunction, evaluators should take a biopsychosocial approach that may require consultation with multiple health care professionals from various fields in order to get to the root of the sexual dysfunction; this multidisciplinary methodology offers the best chance of successful treatment. For males, this article focuses on erectile dysfunction (ED) and hypogonadism. The initial evaluation of ED involves a thorough case history, preferably taken from the patient and partner, physical examination, and proper laboratory and diagnostic tests, including an acknowledgment of the subjective complaint. The diagnosis is established on the basis of an individual's report of the consistent inability to attain and maintain an erection sufficient to permit satisfactory sexual intercourse. Initial workups for ED should entail a detailed history that can be obtained from a validated questionnaire such as the International Index of Erectile Function and the Sexual Health Inventory for Men. Hypogonadism is evaluated using the validated Androgen Deficiency in the Aging Male questionnaire and laboratory testing for testosterone deficiency. Treatments logically can begin with the least invasive and then progress to more invasive strategies after appropriate counseling. The last and most important treatment component when caring for men with sexual dysfunction—and, arguably, the least practiced—is close follow-up.

Relationships Between the Friction and Viscoelastic Properties of Rubber

2000 ◽  
Vol 28 (3) ◽  
pp. 178-195 ◽  
Author(s):  
N. Amino ◽  
Y. Uchiyama
Keyword(s):  
Viscoelastic Properties ◽  
Skid Resistance ◽  
Grain Sizes ◽  
Abrasive Grain ◽  
The Coefficient Of Friction ◽  
Tan Δ ◽  
Silicone Carbide ◽  
And Storage ◽  
Wet Skid Resistance ◽  
Frequency Curves

Abstract In this study, the relationships between friction and viscoelastic properties such as loss tangent tan δ and storage modulusE′ were examined. Wet skid resistance was measured using the British Pendulum Tester. The rubber specimens were rubbed againstfive silicone carbide cloths of differing abrasive grain sizes. The viscoelastic properties of the rubber specimens were measured with a viscoelasticspectrometer. From the data on wet skid resistance and viscoelastic properties, it is found that the coefficient of friction μ varies as follows:           μ = a + b · tan δ/E′ where a and b are constants. Tan δ/E′ was related to the hysteresis term of friction, and the μ-frequency curves were compared with the tan δ/E′ –frequency curves.

PRODEC STAINLESS TYPE 316

Alloy Digest ◽  
1993 ◽  
Vol 42 (9) ◽  
Keyword(s):  
Physical Properties ◽  
Tool Life ◽  
Surface Finish ◽  
Laboratory Testing ◽  
Machining Time ◽  
Aisi Type

Abstract PRODEC STAINLESS TYPE 316 is a standardized grade in plate and bar with an improved machining capability over the conventional AISI Type 316. It is a product of extensive laboratory testing and application proven. Its improved machinability offers: shorter machining time; longer tool life; better surface finish; less distortion problems; more homogeneity in microstructures; and marginally increased resistance to corrosion. This datasheet provides information on composition and physical properties. It also includes information on machining. Filing Code: SS-549. Producer or source: Avesta Sheffield Inc.

Epidemiology and antimicrobial resistance of Acinetobacter

2018 ◽  
Vol 2 (4) ◽  
pp. 46-59
Author(s):  
A.G. Salmanov ◽  
O.M. Verner ◽  
L.F. Slepova
Keyword(s):  
Antibiotic Resistance ◽  
Laboratory Testing ◽  
Immunocompromised Host ◽  
Clinical Problem ◽  
Healthcare Associated Infections ◽  
Opportunistic Bacteria ◽  
Acinetobacter Spp ◽  
Healthcare Associated ◽  
Major Clinical Problem

Species of the Acinetobacter represent opportunistic bacteria with a growing clinical significance for Healthcare-associated infections (HAIs). In this literature review, we focus on the current role of Acinetobacter in infectious pathology and describe taxonomy, pathogenicity, and antibiotic resistance of these bacteria. Pathogenesis and regulation of virulence factors in Acinetobacter spp. are described in detail. The majority of acinetobacterial infections are associated with A. baumannii and occur predominantly in an immunocompromised host. Usually, acinetobacterial  infections  are characterized by local purulent inflammation; in severe cases, meningitis and sepsis may develop. Antibiotic resistance of Acinetobacter is a major clinical problem; therefore we give special attention to laboratory testing of resistance to antibiotics as well as identification of Acinetobacter.

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