Precipitation detector Patent

Precipitation detector and mechanism for stopping and restarting machinery at initiation and cessation of rai

Formal descriptions of material manipulations: an exploration with cuts and shadows

Shape computation in design is never purely limited to visual aspects and ideally includes material aspects as well. The physicality of designing introduces a wide range of variables for designers to tackle within the design process. We present a simple design exercise realised in four stages where we physically manipulate perforated cardboard sheets as a case to make material variables explicit in the computation. The emphasis is on representing sensory aspects rather than easily quantifiable properties more suitable for simulations. Our explorations demonstrate the use of visual rules to represent actions, variables and form as well as how to control the variables to create new results, both desired and surprising, in materially informed ways

Optical parameters of leaves of seven weed species

The absorption coefficient (k), infinite reflectance (R), and scattering coefficient (s) were tabulated for five wavelengths and analyzed for statistical differences for seven weed species. The wavelengths were: 0.55-micrometer, 0.65-micrometers, 0.85-micrometer, 1.65-micrometers, and 2.20-micrometer. The R of common lambsquarters (Chenopodium album L.), Johnsongrass (Sorghum halepense (L.) Pers.), and annual sowthistle (Sonchus oleraceus L.) leaves at the 0.85-micrometer wavelength were significantly (p=0.05) higher than for sunflower (Heliantus annus L.), ragweed parthenium (Parthenium hysterophorus L.), or London rocket (Sisymbrium irio L.). Annual sowthistle had the largest k value, and Plamer amaranth (Amaranthus palmer S. Wats.) had the smallest k value at the 0.65 approximately chlorophyll absorption wavelength. In general, john-songress, ragweed parthenium, or London rocket had the largest s values among the five wavelengths, wereas annual sowthistle and plamar amaranth were usually lowest

Evaluation Of Dye-micelle Binding Constants Using Diffusion Sensitive Band Broadening Effects

The diffusion coefficients of small solutes can be significantly altered by the presence of association colloids such as micelles. A relationship is utilized that relates the diffusion coefficient of a solute to its partitioning or binding behavior to a micellar pseudo phase. The Taylor-Aris dispersion method was used to evaluate the diffusion coefficient of several dyes in the presence and absence of sodium dodecyl sulfate micelles. With this approach, all binding constants can be determined easily and reproducibly. The theory, experimental approach, and advantages of this technique are discussed. © 1988

Group emotions: Cutting the Gordian knots concerning terms, levels-of-analysis, and processes

Research has established that groups are pervaded by feelings. But group emotion research within organizational science has suffered in recent years from a lack of terminological clarity, from a narrow focus on small groups, and from an overemphasis on micro-processes of emotion transmission. We address those problems by reviewing and systematically integrating relevant work conducted not only in organizational science, but also in psychology and sociology. We offer a definition of group emotions and sort the conceptual space along four dimensions: group emotion responses, recognition, regulation, and reiteration. We provide evidence that group emotions occur at all levels of analysis, including levels beyond small work groups. The accounts of group emotion emergence at higher levels of analysis differ substantially between organizational science, psychology and sociology. We review these accounts – emergence through inclination, interaction, institutionalization, or identification – and then synthesize them into one parsimonious model. The consequences of different group emotions are reviewed and further constructs (including emotional aperture, group emotional intelligence, emotional culture and emotional climate) are discussed. We end with a call for future research on several neglected group emotion topics including the study of discrete shared emotions, emotions at multiple levels, the effects of social network patterns, and effects on group functioning

Group Emotions: Cutting the Gordion Knots Concerning Terms, Levels-of-Analysis, and Processes

Research has established that groups are pervaded by feelings. But group emotion research within organizational science has suffered in recent years from a lack of terminological clarity, from a narrow focus on small groups, and from an overemphasis on micro-processes of emotion transmission. We address those problems by reviewing and systematically integrating relevant work conducted not only in organizational science, but also in psychology and sociology. We offer a definition of group emotions and sort the conceptual space along four dimensions: group emotion responses, recognition, regulation, and reiteration. We provide evidence that group emotions occur at all levels of analysis, including levels beyond small work groups. The accounts of group emotion emergence at higher levels of analysis differ substantially between organizational science, psychology and sociology. We review these accounts – emergence through inclination, interaction, institutionalization, or identification – and then synthesize them into one parsimonious model. The consequences of different group emotions are reviewed and further constructs (including emotional aperture, group emotional intelligence, emotional culture and emotional climate) are discussed. We end with a call for future research on several neglected group emotion topics including the study of discrete shared emotions, emotions at multiple levels, the effects of social network patterns, and effects on group functioning

Influence of water availability in the distributions of branched glycerol dialkyl glycerol tetraether in soils of the Iberian Peninsula

The combined application of the MBT (degree of methylation) and CBT (degree of cyclization) indices, based on the distribution of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in soils, has been proposed as a paleoproxy to estimate mean annual temperature (MAT). CBT quantifies the degree of cyclization of brGDGTs and relates to soil pH. MBT and the simplified version MBT' quantify the degree of methylation of brGDGTs and relate to MAT and soil pH. However, other factors such as soil water availability have also been suggested to influence MBT' and possibly restrict the combined application of the MBT' and CBT indices as a paleotemperature proxy. To assess the effect of hydrological conditions on MBT' and CBT, a set of 23 Iberian Peninsula soil samples, covering a MAT range from 10 to 18 °C and a mean annual precipitation (MAP) range of 405 mm to 1455 mm, was analyzed. We found that the CBT was indeed significantly correlated with soil pH in our sample set. In contrast, MBT' was not correlated with MAT but had a significant correlation with the aridity index (AI), a parameter related to water availability in soils. The AI can explain 50% of the variation of the MBT', and 70% of the residuals of MAT estimated with the MBT/CBT proxy as compared to instrumentally measured MAT. We propose that, in arid settings, where water may be an ecologically limiting factor, MBT' is influenced by hydrological conditions rather than temperature. Thus, our results suggest that the combination of MBT' and CBT indices should be applied with caution in paleotemperature reconstructions in soils from dry subhumid to hyperarid environments

Between home and work: Commuting as an opportunity for role transitions

Across the globe, every workday people commute an average of 38 minutes each way, yet surprisingly little research has examined the implications of this daily routine for work-related outcomes. Integrating theories of boundary work, self-control, and work-family conflict, we propose that the commute to work serves as a liminal role transition between home and work roles, prompting employees to engage in boundary management strategies. Across three field studies (n = 1,736), including a four-week-long intervention study, we find that lengthy morning commutes are more aversive for employees with lower trait self-control and greater work-family conflict, leading to decreased job satisfaction and increased turnover. In addition, we find that employees who engage in a specific boundary management strategy we term role-clarifying prospection (i.e., thinking about the upcoming work role) are less likely to be negatively affected by lengthy commutes to work. Results further show that employees with higher levels of trait self-control are more likely to engage in role-clarifying prospection, and employees who experience higher levels of work-family conflict are more likely to benefit from role-clarifying prospection. Although the commute to work is typically seen as an undesirable part of the workday, our theory and results point to the benefits of using it as an opportunity to transition into one’s work role

The micro foundations of organizational social networks: A review and an agenda for future research.

This paper focuses on an emergent debate about the micro-foundations of organizational social networks. We consider three theoretical positions: an individual agency perspective suggesting that people, through their individual characteristics and cognitions, shape networks; a network patterning perspective suggesting that networks, through their structural configuration, form people; and a co-evolution perspective suggesting that people in their idiosyncrasies and networks in their differentiated structures co-evolve. We come to the conclusion that individual attitudes, behaviors, and outcomes cannot be fully understood without considering the structuring of organizational contexts in which people are embedded, and that social network structuring and change in organizations cannot be fully understood without considering the psychology of purposive individuals. To guide future research, we identify key questions from each of the three theoretical perspectives and, particularly, encourage more research on how individual actions and network structure co-evolve in a dynamic process of reciprocal influence