Magnetic latches provide positive overpressure control

Louvers are used for overpressure safety venting in rooms or chambers where explosion hazards exist. The louvers have individually hinged closures that are held in locked position by commercially available magnets that quickly release them in an overpressure condition

Stability of a non-local kinetic model for cell migration with density-dependent speed

The aim of this article is to study the stability of a non-local kinetic model proposed by Loy & Preziosi (2020a) in which the cell speed is affected by the cell population density non-locally measured and weighted according to a sensing kernel in the direction of polarization and motion. We perform the analysis in a d-dimensional setting. We study the dispersion relation in the one-dimensional case and we show that the stability depends on two dimensionless parameters: the first one represents the stiffness of the system related to the cell turning rate, to the mean speed at equilibrium and to the sensing radius, while the second one relates to the derivative of the mean speed with respect to the density evaluated at the equilibrium. It is proved that for Dirac delta sensing kernels centered at a finite distance, corresponding to sensing limited to a given distance from the cell center, the homogeneous configuration is linearly unstable to short waves. On the other hand, for a uniform sensing kernel, corresponding to uniformly weighting the information collected up to a given distance, the most unstable wavelength is identified and consistently matches the numerical solution of the kinetic equation

Modelling physical limits of migration by a kinetic model with non-local sensing

Migrating cells choose their preferential direction of motion in response to different signals and stimuli sensed by spanning their external environment. However, the presence of dense fibrous regions, lack of proper substrate, and cell overcrowding may hamper cells from moving in certain directions or even from sensing beyond regions that practically act like physical barriers. We extend the non-local kinetic model proposed by Loy and Preziosi (J Math Biol, 80, 373–421, 2020) to include situations in which the sensing radius is not constant, but depends on position, sensing direction and time as the behaviour of the cell might be determined on the basis of information collected before reaching physically limiting configurations. We analyse how the actual possible sensing of the environment influences the dynamics by recovering the appropriate macroscopic limits and by integrating numerically the kinetic transport equation

Key Information Technology Issues In Higher Education In The 1990s

The results of a delphi survey of the key information technology (IT) issues facing IS managers in college and universities in the U.S. in the 1990s are reported in this paper. The participants represent 161 colleges and universities that grant at least baccalaureate degrees. The study is similar to those conducted by the Society for Information Management (SIM) and the MIS Research Center (MISRC) at the University of Minnesota which have focused almost exclusively on the private sector, and studies sponsored by CAUSE, a nonprofit association concerned with the use and management of information technology in higher education. The purpose of the research is to identify the key issues facing higher education IS managers in the U.S. in the 1990s. This paper reports that the rank ordering of the key issues for the respondent institutions. The top key issues for research institutions include integrating new technologies into existing systems; improving user access to IS and communications systems; integrating systems and local area networks; managing administrative data resources; developing administrative support systems; establishing an information technology architecture; and improving IS strategic planning. Also reported are the issues on which significant differences exist between research and nonresearch institutions. The results indicate that the most critical IT issue facing public, nonresearch institutions is fundin

Viola primulifolia L.

https://thekeep.eiu.edu/herbarium_specimens_byname/20769/thumbnail.jp

Lysimachia terrestris (L.) Britton, Sterns & Poggenb.

https://thekeep.eiu.edu/herbarium_specimens_byname/8562/thumbnail.jp

Viola pratincola Greene

https://thekeep.eiu.edu/herbarium_specimens_byname/20662/thumbnail.jp

Rapid Typing of \u3ci\u3eMannheimia haemolytica\u3c/i\u3e Major Genotypes 1 and 2 Using MALDI-TOF Mass Spectrometry

Genotype 2 M. haemolytica predominantly associate over genotype 1 with the lungs of cattle with respiratory disease and ICEs containing antimicrobial resistance genes. Distinct protein masses were detected by MALDI-TOF MS between genotype 1 and 2 strains. MALDI-TOF MS could rapidly differentiate genotype 2 strains in veterinary diagnostic laboratories

Rapid Typing of \u3ci\u3eMannheimia haemolytica\u3c/i\u3e Major Genotypes 1 and 2 Using MALDI-TOF Mass Spectrometry

Genotype 2 M. haemolytica predominantly associate over genotype 1 with the lungs of cattle with respiratory disease and ICEs containing antimicrobial resistance genes. Distinct protein masses were detected by MALDI-TOF MS between genotype 1 and 2 strains. MALDI-TOF MS could rapidly differentiate genotype 2 strains in veterinary diagnostic laboratories

Viola pratincola Greene

https://thekeep.eiu.edu/herbarium_specimens_byname/20662/thumbnail.jp