Adaptation of a Cascade Impactor to Flight Measurement of Droplet Size in Clouds

A cascade impactor, an instrument for obtaining: the size distribution of droplets borne in a low-velocity air stream, was adapted for flight cloud droplet-size studies. The air containing the droplets was slowed down from flight speed by a diffuser to the inlet-air velocity of the impactor. The droplets that enter the impactor impinge on four slides coated with magnesium oxide. Each slide catches a different size range. The relation between the size of droplet impressions and the droplet size was evaluated so that the droplet-size distributions may be found from these slides. The magnesium oxide coating provides a permanent record. of the droplet impression that is not affected by droplet evaporation after the. droplets have impinged

An Instrument Employing a Coronal Discharge for the Determination of Droplet-Size Distribution in Clouds

A flight instrument that uses electric means for measuring the droplet-size distribution in above-freezing clouds has been devised and given preliminary evaluation in flight. An electric charge is placed on the droplets and they are separated aerodynamically according to their mass. Because the charge placed on the droplets is a. function of the droplet size, the size spectrum can 'be determined by measurement of the charge deposited on cylinders of several different sizes placed to intercept the charged droplets. An expression for the rate of charge acquisition by a water droplet in a field of coronal discharge is derived. The results obtained in flight with an instrument based on the method described indicate that continuous records of droplet-size spectrum variations in clouds can be obtained. The experimental instrument was used to evaluate the method and was not refined to the extent necessary for obtaining conclusive meteorological data. The desirable features of an instrument based on the method described are (i) The instrument can be used in clouds with temperatures above freezing; (2) the size and the shape of the cylinders do not change during the exposure time; (3) the readings are instantaneous and continuous; (4) the available sensitivity permits the study of variations in cloud structures of less than 200 feet in extent

The Changing Communication Patterns of Engineers

In the 21st-century workplace, communicating information effectively is essential for organizational success. It is only with a proper understanding of the power of communication-and the multiple channels through which information is sent-that problem solving, creativity and innovation are fostered. As workers face increasing demands on their time, they are finding new and unique ways to use technology in order to communicate. Further, for the communication to be effective, workers must understand cultural differences and overcome cultural barriers, as for many in the high-tech industry, the workplace is now global. In the global environment, meetings are common, but due to distance, actual face-to-face interactions between and among colleagues are becoming less frequent

Communicating in the 21st Century Workplace: A Theory of Communication Nexus

The workplace is evolving into the communication nexus; a central connection point for messages among workers. Naturalistic observations of 69 workers in four U.S. high-tech firms identified three themes: (1) frequency of communication, (2) availability and use of multiple communication channels, and (3) need for instantaneous communication. A new theory of the organizational workplace as a communication nexus is presented here to explain new organizational communication phenomena and predict organizational communication in the contemporary workplace

Autobiographically Significant Concepts: More Episodic than Semantic in Nature? An Electrophysiological Investigation of Overlapping Types of Memory

A common assertion is that semantic memory emerges from episodic memory, shedding the distinctive contexts associated with episodes over time and/or repeated instances. Some semantic concepts, however, may retain their episodic origins or acquire episodic information during life experiences. The current study examined this hypothesis by investigating the ERP correlates of autobiographically significant (AS) concepts, that is, semantic concepts that are associated with vivid episodic memories. We inferred the contribution of semantic and episodic memory to AS concepts using the amplitudes of the N400 and late positive component, respectively. We compared famous names that easily brought to mind episodic memories (high AS names) against equally famous names that did not bring such recollections to mind (low AS names) on a semantic task (fame judgment) and an episodic task (recognition memory). Compared with low AS names, high AS names were associated with increased amplitude of the late positive component in both tasks. Moreover, in the recognition task, this effect of AS was highly correlated with recognition confidence. In contrast, the N400 component did not differentiate the high versus low AS names but, instead, was related to the amount of general knowledge participants had regarding each name. These results suggest that semantic concepts high in AS, such as famous names, have an episodic component and are associated with similar brain processes to those that are engaged by episodic memory. Studying AS concepts may provide unique insights into how episodic and semantic memory interact

Glycogen Synthetase [Udp Glucose: α-1, 4-Glucan α-4-Glucosyl Transferase (Ec 2.4.1.11)] of Human Epidermis

Normal human epidermis contains glycogen synthetase in activities which are approximately 10% of that found in brain and muscle. The enzyme is activated by glucose-6-phosphate (Glc-6-P) and seems to have characteristics which are similar to those reported for the same enzyme in other tissues. About 50% of the enzyme is normally in the I form which presumably correlates with the very low levels of glycogen (0.35 µg/mg) normally present in human epidermis

Identifying and Indexing Icosahedral Quasicrystals from Powder Diffraction Patterns

We present a scheme to identify quasicrystals based on powder diffraction data and to provide a standardized indexing. We apply our scheme to a large catalog of powder diffraction patterns, including natural minerals, to look for new quasicrystals. Based on our tests, we have found promising candidates worthy of further exploration.Comment: 4 pages, 1 figur

When and why people misestimate future feelings: Identifying strengths and weaknesses in affective forecasting.

People try to make decisions that will improve their lives and make them happy, and to do so, they rely on affective forecasts-predictions about how future outcomes will make them feel. Decades of research suggest that people are poor at predicting how they will feel and that they commonly overestimate the impact that future events will have on their emotions. Recent work reveals considerable variability in forecasting accuracy. This investigation tested a model of affective forecasting that captures this variability in bias by differentiating emotional intensity, emotional frequency, and mood. Two field studies examined affective forecasting in college students receiving grades on a midterm exam (Study 1, N = 643), and U.S. citizens after the outcome of the 2016 presidential election (Study 2, N = 706). Consistent with the proposed model, participants were more accurate in forecasting the intensity of their emotion and less accurate in forecasting emotion frequency and mood. Overestimation of the effect of the event on mood increased over time since the event. Three experimental studies examined mechanisms that contribute to differential forecasting accuracy. Biases in forecasting intensity were caused by changes in perceived event importance; biases in forecasting frequency of emotion were caused by changes in the frequency of thinking about the event. This is the first direct evidence mapping out strengths and weaknesses for different types of affective forecasts and the factors that contribute to this pattern. (PsycINFO Database Record (c) 2019 APA, all rights reserved)

Teaching Expatriate Adaptation While Dealing With Reality: The Impact of a Tragedy on the Study-Abroad Experience

This paper explores the relevance of the accepted U-shaped models of expatriate adaptation to students engaged in an international educational experience when they are faced with a tragedy. In this study-abroad course, an examination of the existing adaptation models and how they provide a set of expectations for the process of cultural adjustment is presented as course material. During a particular four-week summer program, one of the nineteen students who went abroad died in an accident at the end of the first week. It became clear after the tragedy that the models studied failed to explain the impact of a personal tragedy of this magnitude on the students’ adjustment process. This unfortunate event provided an opportunity to conduct a quasi-experiment to consider the impact of personal tragedy for students to question a body of research through their own personal experience and for scholars to re-examine and update the existing models