Vacuum formation and negative pressure transmission under a self-starting drainage process

2020 ◽  
Vol 54 (1) ◽  
pp. qjegh2019-129
Author(s):  
Hong-yue Sun ◽  
Fei-xiang Shuai ◽  
Dong-fei Wang ◽  
Cheng-cheng Lv ◽  
Yue-quan Shang
Keyword(s):  
Negative Pressure ◽  
The Self ◽  
Vacuum Pressure ◽  
Laboratory Model ◽  
Seepage Field ◽  
Pressure Transmission ◽  
The Difference ◽  
Groundwater Drainage ◽  
Permeable Section ◽  
Surrounding Soil

Drainage can effectively control landslides that are caused by the infiltration of rainfall. Laboratory model tests were conducted in this study to investigate an efficient groundwater drainage method. The tests identified a drainage method that self-starts and creates a vacuum in the permeable section through siphoning. In addition, the value of the vacuum pressure in the permeable section is related to the difference in the height from the outlet of the drain to the permeable section. The greater the height, the greater the vacuum pressure generated in the permeable section. However, the vacuum pressure attenuates continuously in the process of transfer in the soil. It was also proved that there is a smaller attenuation of the amplitude in soil that has good permeability. Most importantly, the self-starting drainage method makes the surrounding soil form a vacuum seepage field and increases the seepage gradient, thereby improving the efficiency of the drainage.

I Like Her, Because I Like Myself: Self-Evaluation as a Source of Interpersonal Attitudes

2003 ◽  
Vol 50 (4) ◽  
pp. 239-246 ◽  
Author(s):  
Eva Walther ◽  
Claudia Trasselli
Keyword(s):  
Opposite Effect ◽  
Learning Phase ◽  
The Self ◽  
Attitude Formation ◽  
Formation Processes ◽  
False Feedback ◽  
Self Evaluation ◽  
Evaluation Group ◽  
Group A ◽  
The Difference

Abstract. Two experiments tested the hypothesis that self-evaluation can serve as a source of interpersonal attitudes. In the first study, self-evaluation was manipulated by means of false feedback. A subsequent learning phase demonstrated that the co-occurrence of the self with another individual influenced the evaluation of this previously neutral target. Whereas evaluative self-target similarity increased under conditions of negative self-evaluation, an opposite effect emerged in the positive self-evaluation group. A second study replicated these findings and showed that the difference between positive and negative self-evaluation conditions disappeared when a load manipulation was applied. The implications of self-evaluation for attitude formation processes are discussed.

Kunst als reflexive Form und als reflektierende Bewegung

2010 ◽  
Vol 55 (2) ◽  
pp. 75-86
Author(s):  
Brigitte Hilmer
Keyword(s):  
Propositional Content ◽  
The Self ◽  
Aesthetic Judgement ◽  
The Difference ◽  
Self Reference

Kunst kann dann als reflexiv interpretiert werden, wenn Reflexivität nicht auf propositionalen Gehalt oder sogar sprachliche Artikulation angewiesen ist. Reflexion tritt auf in den Modi der Selbstbeziehung des Lebendigen, des Überlegens und der Selbstreferenz im Symbolischen. Kunst ist ein Reflexionsmedium, das diese Modi beansprucht und miteinander verflicht. Eine spezifisch ästhetische Reflexivität ist von und nach Kant nach dem Vorbild der transzendentalen Reflexion und in Konkurrenz zu ihr etabliert worden. Sie läßt sich als Reflexivität des ästhetischen Urteils, als emphatisches Gemachtsein, als Rückwendung auf Wahrnehmungsvollzüge oder als Begriffsreflexion verstehen. Dabei wird die Unterscheidung von Anschauung und Verstand in deren Zusammenspiel oder Abspaltung vorausgesetzt. Von der Analogie zur transzendentalen Reflexion löst sich aber erst ein Verständnis von ästhetischer Reflexivität, das von den drei Modi und ihrer Verflechtung ausgeht.<br><br>Reflexivity does not presuppose linguistic articulation or even propositional content. If it did, art could not be called reflexive. Reflexivity can be found in the self-contact of the living, in mental reflection or in symbolic self-reference. Art is a medium which claims these different modes of reflexivity and intertwines them. Aesthetic reflexivity as such has been established by Kant and his epigones, following the model of transcendetal reflection. Thus it could be specified as the reflexive structure of aesthetic judgement, or as an emphasis on a work’s being created, or as a reference to perception itself in the process of perceiving, or as a way of reflecting concepts. Aesthetic reflexivity can only be detached from the model of transcendental reflection, if it is seen as oriented towards the interaction among the three modes of reflection mentioned above, leaving aside the difference, interplay or competition between perception and conceptual capacities.

Reduced venous compliance in lower limbs of aging humans and its importance for capacitance function

1998 ◽  
Vol 275 (3) ◽  
pp. H878-H886 ◽  
Author(s):  
Henrik Olsen ◽  
Toste Länne
Keyword(s):  
Muscle Tissue ◽  
Negative Pressure ◽  
Lower Body Negative Pressure ◽  
Subcutaneous Tissue ◽  
Lower Limbs ◽  
Venous Compliance ◽  
Reduced Pressure ◽  
Pressure Transmission ◽  
Circulatory Stress ◽  
Capacitance Response

Venous compliance in the calf of humans and its importance for capacitance function in relation to age were studied with the aid of 22, 44, and 59 mmHg lower body negative pressure (LBNP). Negative pressure transmission to the calf as well as changes in calf volume were studied, and venous compliance was calculated [change in volume with pressure change (dV/dP)]. The change in capacitance response of the calf with age (20–70 yr) was evaluated during LBNP 44 mmHg. Transmission of negative pressure to the subcutaneous tissue was almost full without any changes with age (92%). However, it was reduced to 80% in the underlying muscle tissue, irrespective of depth. Venous compliance in the young was 0.051 ml ⋅ 100 ml−1 ⋅ mmHg−1and was reduced by 45% to 0.029 ml ⋅ 100 ml−1 ⋅ mmHg−1in the old ( P < 0.05). Accordingly, the capacitance response was reduced by 0.015 ml ⋅ 100 ml−1 ⋅ yr−1( P < 0.005). Furthermore, the hemodynamic response to hypovolemic circulatory stress was attenuated with age. The reduced pressure transmission in muscle tissue is probably due to restriction of the muscle fascia envelope. The reduced venous compliance with age and the concomitant reduction in capacitance response during LBNP have implications for both the sympathetic reflex responses as well as the capacitance response during acute hypovolemic circulatory stress, which might be defected in aging humans.

scholarly journals Clinical Efficacy of Novel Patient-Covering Negative-Pressure Box for Shielding Virus Transmission during Esophagogastroduodenoscopy: A Prospective Observational Study

Diagnostics ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1679
Author(s):  
Shintaro Fujihara ◽  
Hideki Kobara ◽  
Noriko Nishiyama ◽  
Naoya Tada ◽  
Kazuhiro Kozuka ◽  
...  
Keyword(s):  
Negative Pressure ◽  
Prospective Observational Study ◽  
Preventive Measures ◽  
Virus Transmission ◽  
Preventive Effect ◽  
Degree Of Contamination ◽  
Cutoff Value ◽  
Before And After ◽  
Particle Counts ◽  
The Difference

Esophagogastroduodenoscopy (EGD) has a high risk of virus transmission during the current coronavirus disease 2019 era, and preventive measures are under investigation. We investigated the effectiveness of a newly developed patient-covering negative-pressure box system (Endo barrier®) (EB) for EGD. Eighty consecutive unsedated patients who underwent screening EGD with EB use were prospectively enrolled. To examine the aerosol ratio before, during, and after EGD, 0.3- and 0.5-μm aerosols were measured every 60 s using an optical counter. Moreover, the degree of contamination of the examiners’ goggles and vinyl gowns was assessed before and after EGD using a rapid adenosine triphosphate (ATP) test for simulated droplets. Data were available in 73 patients and showed that 0.3- and 0.5-μm particles did not increase in 95.8% (70/73) and 94.5% (69/73) of patients during EGD under EB. There were no significant differences in the total 0.3- or 0.5-μm particle counts before versus after EGD. The difference in the ATP levels before and after EGD was −0.6 ± 16.6 relative light units (RLU) on goggles and 1.59 ± 19.9 RLU on gowns (both within the cutoff value). EB use during EGD may provide a certain preventive effect against aerosols and droplets, decreasing examiners’ exposure to viruses.

scholarly journals The infection-tolerant mammalian reservoir of Lyme disease and other zoonoses broadly counters the inflammatory effects of endotoxin

2020 ◽  
Author(s):  
Gabriela Balderrama-Gutierrez ◽  
Ana Milovic ◽  
Vanessa J. Cook ◽  
M. Nurul Islam ◽  
Youwen Zhang ◽  
...  
Keyword(s):  
Expression Profiles ◽  
Laboratory Model ◽  
Infection Model ◽  
Rna Seq ◽  
Acute Phase Reactants ◽  
Macrophage Response ◽  
Reactive Protein ◽  
Arginase 1 ◽  
The Difference ◽  
The Cost

ABSTRACTAnimals that are competent natural reservoirs of zoonotic diseases commonly suffer little morbidity from the pathogens they persistently harbor. The mechanisms of this infection tolerance and the trade-off costs are poorly understood. We used exposure to a single dose of lipopolysaccharide (LPS) endotoxin as an experimental model of inflammation to compare the responses of the cricentine rodent Peromyscus leucopus, the white-footed deermouse, to that of Mus musculus, the standard laboratory model for pathogenesis studies. Four hours after injection with either LPS or saline, blood and spleen and liver tissues were collected postmortem and subjected to RNA-seq, untargeted metabolomics, and specific RT-qPCR. This was followed by analysis of differential expression at the gene, pathway, and empirical network levels. The deermice showed the same signs of sickness as the mice with LPS exposure, and in addition demonstrated comparable increases in levels of corticosterone and expression of interleukin (IL)-6, tumor necrosis factor, IL-1β, and acute phase reactants, including C-reactive protein. But whereas the M. musculus response to LPS was best-characterized by network analysis as cytokine-associated, the P. leucopus response was dominated by pathway terms associated with neutrophil activity. Dichotomies between the species in expression profiles of arginase 1 and nitric oxide synthase 2, as well as the ratios of IL-10 to IL-12, were consistent with a type M1 polarized macrophage response in the mice and a type M2 or alternatively-activated response in the deermice. Analysis of metabolites in the plasma and RNA in the tissues revealed differences between the two species in tryptophan metabolism during response to LPS. Two up-regulated genes in particular signified the difference between the species: Slpi (secretory leukocyte proteinase inhibitor) and Ibsp (integrin-binding protein sialoprotein). The latter was previously unrecognized in the context of inflammation or infection. Key RNA-seq findings in P. leucopus were replicated in a second LPS experiment with older animals, in a systemic bacterial infection model, and with cultivated fibroblasts. Taken together, the results indicate that the deermouse possesses several adaptive traits to moderate effects of inflammation and oxidative stress ensuing from infection. This seems to be at the cost of infection persistence and that is to the benefit of the pathogen.

scholarly journals On the self-induction of electric currents in a thin anchor-ring

1912 ◽  
Vol 86 (590) ◽  
pp. 562-571 ◽  
Keyword(s):  
Cross Section ◽  
Circular Cross Section ◽  
The Self ◽  
Electric Currents ◽  
Fourth Term ◽  
Starting Point ◽  
Axis Of Symmetry ◽  
The Difference ◽  
Circular Axis ◽  
Mutual Induction

In their useful compendium of "Formulæ and Tables for the Calculation of Mutual and Self-Inductance," Rosa And Cohen remark upon a small discrepancy in the formulæ given by myself and by M. Wien for the self-induction of a coil of circular cross-section over which the current is uniformly distributed . With omission of n , representative of the number of windings, my formula was L = 4 πa [ log 8 a / ρ - 7/4 + ρ 2 /8 a 2 (log 8 a / ρ + 1/3) ], (1) where ρ is the radius of the section and a that of the circular axis. The first two terms were given long before by Kirchhoff. In place of the fourth term within the bracket, viz., +1/24 ρ 2 / a 2 , Wien found -·0083 ρ 2 / a 2 . In either case a correction would be necessary in practice to take account of the space occupied by the insulation. Without, so far as I see, giving a reason, Rosa and Cohen express a preference for Wien's number. The difference is of no great importance, but I have thought it worth while to repeat the calculation and I obtain the same result as in 1881. A confirmation after 30 years, and without reference to notes, is perhaps almost as good as if it were independent. I propose to exhibit the main steps of the calculation and to make extension to some related problems. The starting point is the expression given by Maxwell for the mutual induction M between two neighbouring co-axial circuits. For the present purpose this requires transformation, so as to express the inductance in terms of the situation of the elementary circuits relatively to the circular axis. In the figure, O is the centre of the circular axis, A the centre of a section B through the axis of symmetry, and the position of any point P of the section is given by polar co-ordinates relatively to A, viz.

Effect of Nursing Measures Based on Self-Efficacy Theory on State Self-Esteem of Breast Cancer Patients

2021 ◽  
Vol 7 (6) ◽  
pp. 6469-6476
Author(s):  
Li Qiu ◽  
Hongli Wang ◽  
Yuan Yuan ◽  
Ying Wang ◽  
Ping Yu
Keyword(s):  
Breast Cancer ◽  
Cancer Patients ◽  
Self Efficacy ◽  
Self Esteem ◽  
The Self ◽  
Control Group ◽  
Observation Group ◽  
Breast Cancer Patients ◽  
Functional Exercise ◽  
The Difference

To analyze the effect of nursing measures based on self-efficacy theory on the state self-esteem of breast cancer patients. 110 breast cancer patients who were treated in our hospital from October 2018 to October 2019 were randomly divided into control group and observation group. The control group was given routine nursing measures, and the observation group was given nursing measures under the guidance of self-efficacy theory. Before operation, 1 week after operation and 3 months after operation, the general data of the two groups before and after treatment were recorded. The self-efficacy level and self-esteem level of the patients before and after treatment were assessed by the self-efficacy scale (GSEs) and state self-esteem scale (SSEs). The compliance of functional exercise and shoulder joint activity (ROM) of the two groups were compared, and the physical status of the two groups were analyzed. To analyze the effect of nursing measures based on self-efficacy theory on the state self-esteem of breast cancer patients. The GSEs score of the two groups increased with the time, and there was no significant difference between the two groups before operation (P > 0.05). After 1 week and 3 months, the GSEs score of the observation group was significantly higher than that of the control group (P < 0.05). The compliance evaluation table of functional exercise in the two groups increased with the time, and the compliance evaluation table of functional exercise in the observation group was significantly higher than that in the control group, the difference was statistically significant (P < 0.05). ROM of the two groups increased with time, and ROM of the observation group was significantly better than that of the control group, the difference was statistically significant (P < 0.05). The self-esteem level of the two groups increased with time, and the self-esteem level of the observation group was significantly higherthan that of the control group, the difference was statistically significant (P <0.05). The nursing measures under tne guidance of self-efficacy theory can help patients to complete functionalexercise, improve theirquality of life, improve their self-esteem level, a nd can be widely used in clinical practice.

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