scholarly journals Hard thermal loops for soft or collinear external momenta

2010 ◽  
Vol 2010 (5) ◽  
Author(s):  
Denis Besak ◽  
Dietrich Bödeker
Keyword(s):  
Soft Or ◽  
Hard Thermal Loops

Cryogenic atomic force microscopy

1991 ◽  
Vol 49 ◽  
pp. 54-55
Author(s):  
K. A. Fisher ◽  
M. G. L. Gustafsson ◽  
M. B. Shattuck ◽  
J. Clarke
Keyword(s):  
Room Temperature ◽  
Rapid Freezing ◽  
Cryogenic Temperatures ◽  
Soft Or ◽  
Electrically Conductive ◽  
Force Microscopy ◽  
Flexible Molecules ◽  
Advantages And Disadvantages ◽  
Atomic Force ◽  
Chemical Perturbation

The atomic force microscope (AFM) is capable of imaging electrically conductive and non-conductive surfaces at atomic resolution. When used to image biological samples, however, lateral resolution is often limited to nanometer levels, due primarily to AFM tip/sample interactions. Several approaches to immobilize and stabilize soft or flexible molecules for AFM have been examined, notably, tethering coating, and freezing. Although each approach has its advantages and disadvantages, rapid freezing techniques have the special advantage of avoiding chemical perturbation, and minimizing physical disruption of the sample. Scanning with an AFM at cryogenic temperatures has the potential to image frozen biomolecules at high resolution. We have constructed a force microscope capable of operating immersed in liquid n-pentane and have tested its performance at room temperature with carbon and metal-coated samples, and at 143° K with uncoated ferritin and purple membrane (PM).

MUELLER ALLOY 6732

Alloy Digest ◽  
1984 ◽  
Vol 33 (8) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Base Alloy ◽  
Heat Treating ◽  
Soft Or ◽  
Good Resistance ◽  
Copper Base ◽  
Screw Machine ◽  
Copper Base Alloy ◽  
Machine Work

Abstract MUELLER Alloy 6732 is a free-machining high-leaded copper-base alloy that is especially well suited for screw machine work. It can be used with hard or soft mating members. It can be joined readily by soft or silver soldering. It possesses excellent bearing properties, high mechanical properties and good resistance to corrosion. Its uses include bushings gears, bearings and pump parts. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-481. Producer or source: Mueller Brass Company.

Biodegradable Polyurethanes Cross-Linked by Multifunctional Compounds

2017 ◽  
Vol 14 (6) ◽  
pp. 778-784 ◽  
Author(s):  
Joanna Brzeska
Keyword(s):  
Polymer Structure ◽  
Cross Linking ◽  
Plant Oils ◽  
Lignocellulosic Materials ◽  
Soft Or ◽  
Native State ◽  
Synthetic Compounds ◽  
Multifunctional Compounds ◽  
Hard Segments ◽  
Synthetic Origin

Background: Cross-linking structure of polyurethanes determines no degradability of these materials. However, introducing the hydrolysable substrates (of natural or synthetic origin) into the cross-linked polyurethanes structure makes them biodegradable. Moreover compounds (such as polycaprolactone triol, glycerin, lysine triisocyanate, etc.) that are used for polyurethane cross-linking are degraded in non-toxic products. All these kinds of compounds can be introduced into soft or hard segments via urethane bonds. Objective: The review focuses on kind of multifunctional polyols and isocyanates, and low molecular crosslinkers used for cross-linked polyurethanes obtaining. These compounds are natural substrates (in the native state or after modification) or are synthetic compounds with degradable linkages. They belong to polyesters, plant oils, proteins, saccharides, and others (e.g. lignocellulosic materials), and they are synthesized chemically or via biosynthesis by algae, plants, microorganisms, and by animals. Conclusion: Incorporation of degradable groups (such as ester moieties) into the polymer structure, and using of substrates with the structure known and metabolized by microorganisms for soft or hard segments building, facilitate degradation of cross-linked polyurethanes.

scholarly journals Drifts of the marginally stable burning frequency in the X-ray binaries 4U 1608–52 and Aql X–1

2021 ◽  
Vol 502 (2) ◽  
pp. 1856-1863
Author(s):  
G C Mancuso ◽  
D Altamirano ◽  
M Méndez ◽  
M Lyu ◽  
J A Combi
Keyword(s):  
Frequency Drift ◽  
Soft Or ◽  
Significance Level ◽  
X Ray ◽  
Intermediate States ◽  
Source State ◽  
Nuclear Burning ◽  
Low Mass ◽  
X Ray Binaries ◽  
Stable Burning

ABSTRACT We detect millihertz quasi-periodic oscillations (mHz QPOs) using the Rossi X-ray Time Explorer (RXTE) from the atoll neutron-star (NS) low-mass X-ray binaries 4U 1608–52 and Aql X–1. From the analysis of all RXTE observations of 4U 1608–52 and Aql X–1, we find mHz QPOs with a significance level >3σ in 49 and 47 observations, respectively. The QPO frequency is constrained between ∼4.2 and 13.4 mHz. These types of mHz QPOs have been interpreted as being the result of marginally stable nuclear burning of He on the NS surface. We also report the discovery of a downward frequency drift in three observations of 4U 1608–52, making it the third source that shows this behaviour. We only find strong evidence of frequency drift in one occasion in Aql X–1, probably because the observations were too short to measure a significant drift. Finally, the mHz QPOs are mainly detected when both sources are in the soft or intermediate states; the cases that show frequency drift only occur when the sources are in intermediate states. Our results are consistent with the phenomenology observed for the NS systems 4U 1636–53 and EXO 0748–676, suggesting that all four sources can reach the conditions for marginally stable burning of He on the NS surface. These conditions depend on the source state in the same manner in all four systems.

Forced Feeding for Anorexia: Soft or Hard Paternalism?

2021 ◽  
Vol 28 (2) ◽  
pp. 159-162
Author(s):  
Jennifer H. Radden
Keyword(s):  
Soft Or

scholarly journals To what extent emotion, cognition and behaviour enhance a student’s engagement: A case study on the MAJA teaching approach

2021 ◽  
pp. 147821032110320
Author(s):  
Matt M. Husain
Keyword(s):  
Higher Education ◽  
Cognitive Engagement ◽  
Learning Outcome ◽  
Soft Or ◽  
Final Exam ◽  
Course Content ◽  
Higher Education System ◽  
Student Aspirations ◽  
Class Environment

This empirical article problematises student engagement in today’s higher education system. The objective of this research is to stimulate a student’s behavioural, emotional and cognitive engagement. I employed an inclusive, inductive and reflexive approach and used mixed methods for collecting data from 948 volunteer participants. The preliminary findings illustrate that playing soft or lively music for a few minutes before a class as well as contextualising and delivering course content combined with enrolled students’ background, hobbies and preferences can go a long way in stimulating emotional and cognitive engagements. The findings also reveal that offering chair yoga during mid-term and/or final exam periods as well as encouraging students to hydrate can lead to increasing behavioural adjustments and then in attention and engagement. The results are encapsulated in a novel teaching framework, MAJA (meaning fun in Sanskrit) that stands for: (a) music, (b) anonymous class survey, (c) jest, and (d) aliment. The framework illuminates that when students tangibly sense a connection between a safe and comfortable class environment and course content, their participation increases and absenteeism decreases. They also promote student aspirations and accountability that facilitate critical thinking, an imperative learning outcome in higher education.

Primacy Effect in Orienting Responses to Auditory Stimuli of Tones and Music

1976 ◽  
Vol 42 (3) ◽  
pp. 919-928 ◽  
Author(s):  
Eleanor B. Simon
Keyword(s):  
College Students ◽  
Orienting Response ◽  
Primacy Effect ◽  
Factorial Experiment ◽  
Auditory Stimuli ◽  
Adaptation Period ◽  
Soft Or ◽  
Interstimulus Intervals ◽  
Music Stimulus

This 26 factorial experiment investigated the primacy effect in the orienting response. The type of stimuli (tone or “music”), stimulus intensities (loud or soft), length of adaptation period (same, 5 or 30 sec.; or different, 5 min.), interstimulus intervals (5 or 30 sec.), and sex were studied. College students, 32 males and 32 females were randomly assigned to each group. In the same condition, the tone (or music) was soft (or loud) for 5 sec. (or 30 sec.) in adaptation and was then changed alternately without interruption to loud, soft, etc. (or soft, loud, etc.) for 5 sec. (or 30 sec.). The different condition was identical except for the length of the adaptation period in which the stimuli sounded continuously for 5 min. Analyses of the GSR manifestation of the orienting responses indicated: (a) an over-all primacy effect with the auditory stimuli and (b) the primacy effect occurred in the 5-sec.-same but not in the 30-sec.-same condition as predicted.

Use of electron microscopy to characterize the surfaces of flocculent and nonflocculent yeast cells

1989 ◽  
Vol 35 (12) ◽  
pp. 1081-1086 ◽  
Author(s):  
Byron F. Johnson ◽  
L. C. Sowden ◽  
Teena Walker ◽  
Bong Y. Yoo ◽  
Gode B. Calleja
Keyword(s):  
Electron Microscopy ◽  
Fission Yeast ◽  
Budding Yeast ◽  
The Other ◽  
Yeast Cells ◽  
Scanning Electron Micrographs ◽  
Soft Or ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Scanning Electron

The surfaces of flocculent and nonflocculent yeast cells have been examined by electron microscopy. Nonextractive preparative procedures for scanning electron microscopy allow comparison in which sharp or softened images of surface details (scars, etc.) are the criteria for relative abundance of flocculum material. Asexually flocculent budding-yeast cells cannot be distinguished from nonflocculent budding-yeast cells in scanning electron micrographs because the scar details of both are well resolved, being hard and sharp. On the other hand, flocculent fission-yeast cells are readily distinguished from nonflocculent cells because fission scars are mostly soft or obscured on flocculent cells, but sharp on nonflocculent cells. Sexually and asexually flocculent fission-yeast cells cannot be distinguished from one another as both are heavily clad in "mucilaginous" or "hairy" coverings. Examination of lightly extracted and heavily extracted flocculent fission-yeast cells by transmission electron microscopy provides micrographs consistent with the scanning electron micrographs.Key words: flocculation, budding yeast, fission yeast, scanning, transmission.

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