Direct measurement technique for determining ventilation rate in the deposit feeding clam Macoma nasuta (Bivalvia, Tellinaceae)

1989 ◽  
Vol 101 (2) ◽  
pp. 211-218 ◽  
Author(s):  
D. T. Specht ◽  
H. Lee
Keyword(s):  
Direct Measurement ◽  
Measurement Technique ◽  
Ventilation Rate ◽  
Deposit Feeding ◽  
Macoma Nasuta

Thin Basement Membrane Nephropathy: Diffuse and Segmental Types

2006 ◽  
Vol 130 (10) ◽  
pp. 1533-1537
Author(s):  
Bela Ivanyi ◽  
Robert Pap ◽  
Zoltan Ondrik
Keyword(s):  
Basement Membrane ◽  
Direct Measurement ◽  
Measurement Technique ◽  
Consecutive Series ◽  
Variable Degree ◽  
Thin Basement Membrane Nephropathy ◽  
Quantitative Expression ◽  
Number Of Patients ◽  
Male Patients ◽  
Global Glomerulosclerosis

Abstract Context.—Diffuse thinning of the glomerular basement membrane (GBM) is the ultrastructural diagnostic criterion of thin basement membrane nephropathy (TBMN). However, there is no consensus regarding what diagnosis should be made if the attenuation is segmental. Objective.—To develop a diagnostic approach to TBMN in cases with segmental GBM thinning. Design.—We compared the diagnostic sensitivities of 2 methods used for the quantitative expression of GBM width in a consecutive series of renal biopsies from 26 patients (median age, 36 years; range, 15 to 59 years) with dysmorphic hematuria (a variable degree of proteinuria in 19 patients), a thin GBM, and absence of other renal disease. The harmonic GBM width was determined from orthogonal intercepts, and the actual width in the thinnest loops was obtained by direct measurement. The GBM attenuation was categorized into diffuse or segmental types by conventional inspection. Results.—Segmental TBMN accounted for one third of the series. In neither type did the male patients have a higher harmonic mean GBM width than the female patients. Focal-global glomerulosclerosis was more common in diffuse TBMN. The laborious orthogonal intercept method proved insensitive for the verification of segmental TBMN, whereas the much simpler direct measurement technique captured all the cases. Conclusions.—A considerable number of patients with TBMN display segmental GBM attenuation. Because the routine criterion excludes these cases from the diagnosis, we propose to define TBMN as a clinicopathologic entity of dysmorphic hematuria and a diffusely or segmentally thinned GBM confirmed by the direct measurement technique.

Direct measurement technique for shock wave velocity with irradiation drive

2011 ◽  
Vol 23 (5) ◽  
pp. 1272-1276
Author(s):  
王峰 Wang Feng ◽  
彭晓世 Peng Xiaoshi ◽  
刘慎业 Liu Shenye ◽  
蒋小华 Jiang Xiaohua ◽  
丁永坤 Ding Yongkun
Keyword(s):  
Shock Wave ◽  
Wave Velocity ◽  
Direct Measurement ◽  
Measurement Technique ◽  
Shock Wave Velocity

Principal Stress and Principal Strain Response in Thin-Walled Cylinder

2014 ◽  
Vol 518 ◽  
pp. 286-289
Author(s):  
Yun Zhu ◽  
Xue You Zhao
Keyword(s):  
Internal Pressure ◽  
Principal Stress ◽  
Direct Measurement ◽  
Measurement Technique ◽  
Strain Measurement ◽  
Principal Strain ◽  
Strain Response ◽  
Thin Walled ◽  
Walled Cylinder

The thin-walled cylinder internal pressure is common in practice. In the determination of air on the surface of thin-walled cylindrical principal stress and principal strain, and the resistance strain measurement technique was used for the direct measurement. This paper deals with the function relations of principal stress and principal stain of a thin-walled cylinder varying with time, and the relations between the principal stain rate and the thickness of a thin-walled cylinder, as it is subjected to internal pressure.

A Comparison of Active Near-Interface Traps in Nitrided and As-Grown Gate Oxides by the Direct Measurement Technique

2020 ◽  
Vol 1004 ◽  
pp. 635-641
Author(s):  
Peyush Pande ◽  
Sima Dimitrijev ◽  
Daniel Haasmann ◽  
Hamid Amini Moghadam ◽  
Philip Tanner ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Comparative Analysis ◽  
Direct Measurement ◽  
Measurement Technique ◽  
Measurement Method ◽  
Gate Oxide ◽  
Interface Traps ◽  
Gate Oxides ◽  
Mos Capacitors ◽  
Direct Measurement Method

This paper presents a comparative analysis of the electrically active near-interface traps, energetically located above the bottom of conduction band. Two different samples of N-type SiC MOS capacitors were fabricated with gate oxides grown in (1) dry O2 (as-grown) and (2) dry O2 annealed in nitric oxide (nitride). Measurements performed by the direct measurement method revealed that the traps located further away from the SiO2/SiC interface are removed by nitridation. A spatially localized behaviour of NITs is observed only in the nitrided gate oxide but not in the as-grown gate oxide.

scholarly journals Direct measurement technique for shock wave velocity under super high pressure

2011 ◽  
Vol 60 (2) ◽  
pp. 025202
Author(s):  
Wang Feng ◽  
Peng Xiao-Shi ◽  
Liu Shen-Ye ◽  
Li Yong-Sheng ◽  
Jiang Xiao-Hua ◽  
...  
Keyword(s):  
Shock Wave ◽  
High Pressure ◽  
Wave Velocity ◽  
Direct Measurement ◽  
Measurement Technique ◽  
Shock Wave Velocity

scholarly journals Measurement of small droplet aerosol concentrations in public spaces using handheld particle counters

2020 ◽  
Author(s):  
G. Aernout Somsen ◽  
Cees van Rijn ◽  
Stefan Kooij ◽  
Reinout A. Bem ◽  
Daniel Bonn
Keyword(s):  
Direct Measurement ◽  
Public Spaces ◽  
Ventilation Rate ◽  
Risk Of Infection ◽  
Small Droplet ◽  
Volume Number ◽  
Persistence Time

AbstractWe investigate the role of aerosols in the transmission of SARS-CoV-2 in public spaces. Direct measurement of aerosol concentrations however has proven technically difficult; we propose the use of handheld particle counters as a novel and easily applicable method to measure aerosol concentrations. This allow us to perform measurements in typical public spaces, each differing in volume, number of people and ventilation rate. These data are used to estimate the relation between aerosol persistence time and the risk of infection with SARS-CoV-2.

Selectivity in feeding by the deposit-feeding bivalve Macoma nasuta

1975 ◽  
Vol 32 (2) ◽  
pp. 167-178 ◽  
Author(s):  
J. Hylleberg ◽  
V. F. Gallucci
Keyword(s):  
Deposit Feeding ◽  
Macoma Nasuta
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