California State University, Long Beach

About: California State University, Long Beach is a education organization based out in Long Beach, California, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 10036 authors who have published 13933 publications receiving 377394 citations. The organization is also known as: Cal State Long Beach & Long Beach State.

Close-up imaging of documents and displays with lens arrays.

Abstract: An unusually short close-up imaging system about 8.5 cm (3⅜ in.) long has been developed for document copiers, oscilloscope cameras, and computer peripheral hard-copy cameras. Arrays of simple lenses are molded in rows and columns on two parallel plastic lens plates. Each lens on the first lens plate forms a demagnified, inverted, intermediate image of a small area of the object in the space between lens plates. Each lens in the second plate erects and magnifies an intermediate image and places the resulting final image in partially overlapped registration with adjacent images, forming an erect uniform composite image of the whole object.

New devices for very long-term ECG monitoring

Abstract: Present day 24-h Holter monitors have been shown to miss many arrhythmias that may occur infrequently or under specific circumstances. The advancement in electronic and adhesive technologies have enabled the development of first generation wearable long-term 14-day patch ECG monitors that attach directly to the skin and require no electrodes and wires to operate. This new technology is unobtrusive to the patients and offers them unprecedented mobility. It enables very long-term monitoring of critical patients while they are carrying out daily activities. The monitors are waterproof, offer good adhesion to the skin and can operate as either recorders or wireless streaming devices.

Isothermal multi-passage cooler

Abstract: A thin multi-passage cooler that produces an isothermal heating surface, high heat transfer coefficients, without producing an excessive pressure drop across the coolant passages. The cooler having a plurality of first passages in fluid communication with a plurality of second passages. A coolant flows through the second passages and then through first passages which are in close proximity to a heating source. The first and second passages are oriented and connected such that the direction of coolant flow in the first passages is opposite to the direction of flow in the second passages. To promote high heat transfer coefficients the passages are constructed to have large length to width ratios and small hydraulic diameters.

The Resource Replenishment Function of Interest

Abstract: Interest is a positive emotion associated with increased approach motivation, effort, attention, and persistence. Although experiencing interest promotes behaviors that demand cognitive resources, interest is as a coping resource in frustrating learning situations and is central to self-regulation and sustained motivation. Positive affect, in general, tends to replenish resources, but based on the functions of interest and what interest promotes we suggest that interest, in particular, promotes greater resource replenishment. Across three experiments, experiencing interest during activity engagement (Studies 1 & 2), even when interest is activated via priming (Study 3), caused greater effort and persistence in subsequent tasks than did positive affect. This effect occurred only when participants’ psychological resources were previously depleted (Study 1). Paradoxically, engaging an interesting task replenished resources (vs. positive and neutral tasks) even though the interesting task was more complex and required more effort.

Food habits and ontogenetic changes in the diet of the sandbar shark, Carcharhinus plumbeus, in Hawaii

Abstract: The sandbar shark, Carcharhinus plumbeus, is a wide-ranging coastal species in tropical and temperate regions, and it is the most common species of shark in Hawaii, as in many locations where it occurs. Information on the diet and feeding habits of this species in the Pacific Ocean are extremely limited. For this study we quantified the diet of sandbar sharks in Hawaii based on records collected during the Hawaii Cooperative Shark Research and Control Program from 1967 to 1969. During this program a total of 565 stomachs were examined, of which 265 contained food. Sharks ranged in size from 59 to 190 cm total length. Teleosts were the most common prey group, but both cephalopods and crustaceans also occurred frequently. Ontogenetic changes in diet of sandbar sharks were apparent, with crustaceans forming a greater proportion of the diet of smaller sharks. Both cephalopods and elasmobranchs increased in importance with increasing shark size. Prey diversity also increased with size, with large, mobile, and reef prey species found more commonly in the diet of larger sharks. Mature male and female sharks appeared to segregate by depth, though major differences in the diet between the sexes were not apparent. However, there was some evidence of dietary differences between sharks caught in different depths and seasons. The results of this study suggest that sandbar sharks in Hawaii and throughout the world, are primarily piscivores, but also consume a variety of invertebrate prey, and that their diet varies with geographical location and stage of development.