5,438 research outputs found
The uses of Man-Made diamond in wafering applications
The continuing, rapid growth of the semiconductor industry requires the involvement of several specialized industries in the development of special products geared toward the unique requirements of this new industry. A specialized manufactured diamond to meet various material removal needs was discussed. The area of silicon wafer slicing has presented yet anothr challenge and it is met most effectively. The history, operation, and performance of Man-Made diamond and particularly as applied to silicon wafer slicing is discussed. Product development is underway to come up with a diamond specifically for sawing silicon wafers on an electroplated blade
Thwarted Belongingness In Relation To Face-To-Face and Online Interactions
Suicide has become an increasing problem, and it is ranked as the tenth leading cause of death for all ages (Centers for Disease Control and Prevention, 2012). Joinerâs (2005) interpersonal-psychological theory of suicide states thwarted belongingness - the feeling of being alienated from others - and perceived burdensomeness - the feeling of being a liability to others â are the primary proximal factors leading to suicidal desire. The current study focuses on thwarted belongingness and examines its relationship to face-to-face interactions and online interactions. We hypothesized that negative face-to-face and online interactions would independently predict higher levels of thwarted belongingness. Furthermore, we hypothesized that face-to-face interactions would moderate the relationship between online interactions and thwarted belongingness, and that online interactions would moderate the relationship between face-to-face interactions and thwarted belongingness. 387 participants (79.6% female) at a southern university completed an online survey. Results only partially supported hypotheses, and only face-to-face interactions were shown to independently predict higher levels of thwarted belongingness. The findings from the study have several implications regarding the influence of face-to-face interactions on thwarted belongingness and present several new future directions for research
A Geo-Statistical Investigation of Agricultural and Infrastructural Risk Factors Associated With Primary Verotoxigenic E. Coli (VTEC) Infection in the Republic of Ireland, 2008â2013
Ireland reports the highest incidence of verotoxigenic Escherichia coli (VTEC) infection in Europe. This study investigated potential risk factors for confirmed sporadic and outbreak primary VTEC infections during 2008-2013. Overall, 989 VTEC infections including 521 serogroup O157 and 233 serogroup O26 were geo-referenced to 931 of 18488 census enumeration areas. The geographical distribution of human population, livestock, unregulated groundwater sources, domestic wastewater treatment systems (DWWTS) and a deprivation index were examined relative to notification of VTEC events in 524 of 6242 rural areas. Multivariate modelling identified three spatially derived variables associated with VTEC notification: private well usage (odds ratio (OR) 6.896, p \u3c0.001), cattle density (OR 1.002, p \u3c0.001) and DWWTS density (OR 0.978, p = 0.002). Private well usage (OR 18.727, p \u3c0.001) and cattle density (OR 1.001, p = 0.007) were both associated with VTEC O157 infection, while DWWTS density (OR 0.987, p = 0.028) was significant within the VTEC O26 model. Findings indicate that VTEC infection in the Republic of Ireland is particularly associated with rural areas, which are associated with a ubiquity of pathogen sources (cattle) and pathways (unregulated groundwater supplies)
Quality Suckler Beef From Low and High Input Grassland Management Systems
End of Project ReportSpring calving cows were used in the years 1997 to 2003 in the
development of planned low and high input systems of suckler beef
production.The main objective of the study was to compare a semiintensive
Grange (standard): system of suckler beef production with
a more extensive REPS (Rural Environment Protection Scheme) compatible
system. In the standard system the stocking rate was 0.80 ha
per cow unit (cow plus heifer and steer progeny to slaughter at 20
and 23/24 months of age, respectively, plus replacements or its equivalent),
a nitrogenous fertiliser application rate of 210 kg per ha and
two silage harvests each year amounting to the equivalent of 87% of
the total area harvested. The REPS system involved a 25% lower
stocking rate, an annual nitrogen fertiliser application rate of 90 to
100 kg per ha and one silage harvest (portion in late May to provide
good silage for the progeny and the remainder in June to provide
lower quality silage for cows) amounting to 58% of the total area
harvested.
Between 1997 and 2000 the cow herd were Limousin x Friesians
(LF) and Simmental x (Limousin x Friesians) (SLF). A herd of first
calvers were introduced in 2001 and 2002 which in addition to LF
and SLF included Limousin x (Limousin x Friesians), purebred
Limousin and purebred Charolais. Charolais (or Simmental) sires
were used on mature cows. Replacement heifers were bred to calve
at 2 years of age using an easy calving Limousin bull. Concentrate
inputs per animal were the same in the two systems.
The main findings of the study were:
âą The mean nitrogenous application rates were 210 and 98 kg
per ha in the standard and REPS systems, respectively.
âą Mean dry matter digestibility of the first-cut silages harvested
early (May 19 to May 29), late (June 5 to June 13) and the
second cut silage in the standard system (harvested in
July/early August) were 716, 690 and 674 g/kg, respectively.
âą When averaged throughout two grazing seasons there was no difference between the standard and REPS systems in pregrazing
or post-grazing sward heights.
When examined over one grazing season the only major
difference between the grazing areas was that the pasture
crude protein content was higher in the standard system in
both the pre-grazed (205 and 159 g/kg) and post-grazed (172
v 141 g/kg) swards.
Cow liveweight and body condition score gains at pasture
and calf gains from birth to weaning were the same for both
systems.
Carcass weights of the progeny were the same for the standard
and REPS systems
Experimental evaluation of mobile phone sensors
Smart phone has become an important part of people's daily life. Most of current smart phone are equipped with a rich set of built-in sensors. The mobile applications such as geo-location based video annotation and indoor positioning require precise measurements from sensors. In addition, understanding the sensing performance of a smart phone device is helpful for implementing a mobile application that needs sensor data. This paper presents an experimental evaluation of key sensors in a state of the art smart phone - Google Nexus 4. The sensors chosen in the paper are accelerometer, gyroscope, magnetometer and GPS. Substantial tests have been executed to evaluate the sensors' accuracy, precision, maximum sampling frequency, sampling period jitter, energy consumption
In Memoriam: Daniel J. Meltzer
Sedan Ă„r 2006 har den syntetiskt framstĂ€llda drogen spice existerat i Sverige, men först Ă„r 2008 blev drogen populĂ€r och tidningar började rikta uppmĂ€rksamhet mot den. Genom att drogen kan byta skepnad i uppbyggnaden kan den förbli laglig, dĂ€rför kan egentligen namnet âspiceâ inte betraktas som ett enhetligt begrepp. VĂ„rt syfte med denna studie blev att granska hur drogen spice beskrivs i tidningar och forskning. Ăven hur drogen betraktas gĂ€llande psykosociala och medicinska avseenden. Detta i förhĂ„llande till socialkonstruktivistiskt perspektiv. Den metod som vi valde att anvĂ€nda oss av i studien var kvantitativ innehĂ„llsanalys. Genom analys av 80 stycken svenska tidningsartiklar hĂ€mtade ur databasen mediearkivet, samt vetenskapliga artiklar och litteratur har vi besvarat vĂ„ra frĂ„gestĂ€llningar. De resultat vi fick frĂ„n analyser visade pĂ„ att tidningar kan vara av betydande roll för ungdomars attityder. Tidningar kan utföra bland annat skrĂ€mselpropaganda för att upplysa och förhindra brukandet av spice, dessvĂ€rre visar resultatet en motsatt effekt. Forskning visar att bruk av spice kan pĂ„verka relationer och arbete negativt. Dessutom Ă€r nĂ„gra bieffekter av spice bröstsmĂ€rtor, vanförestĂ€llningar, sjĂ€lvmordstankar och hjĂ€rtstopp
A Contextual Approach to Experiential Avoidance and Social Anxiety: Evidence From an Experimental Interaction and Daily Interactions of People With Social Anxiety Disorder
Experiential avoidance (EA), the tendency to avoid internal, unwanted thoughts and feelings, is hypothesized to be a risk factor for social anxiety. Existing studies of experiential avoidance rely on trait measures with minimal contextual consideration. In two studies, we examined the association between experiential avoidance and anxiety within real-world social interactions. In the first study, we examined the effect of experiential avoidance on social anxiety in everyday life. For 2 weeks, 37 participants with Social Anxiety Disorder (SAD) and 38 healthy controls provided reports of experiential avoidance and social anxiety symptoms during face-to-face social interactions. Results showed that momentary experiential avoidance was positively related to anxiety symptoms during social interactions and this effect was stronger among people with SAD. People low in EA showed greater sensitivity to the level of situational threat than high EA people. In the second study, we facilitated an initial encounter between strangers. Unlike Study 1, we experimentally created a social situation where there was either an opportunity for intimacy (self-disclosure conversation) or no such opportunity (small-talk conversation). Results showed that greater experiential avoidance during the self-disclosure conversation temporally preceded increases in social anxiety for the remainder of the interaction; no such effect was found in the small-talk conversation. Our findings provide insight into the association between experiential avoidance on social anxiety in laboratory and naturalistic settings, and demonstrate that the effect of EA depends upon level of social threat and opportunity
Transformational Leadership and Organizational Citizenship Behavior Motives in Teachers
A principalâs leadership is a key part to the success of a school as their leadership guides both instructional and organizational outcomes. Teachers often work beyond their formal duties to see that all their students have their needs met. This is referred to as an Organizational Citizenship Behavior (i.e., when followers display behaviors that benefit the organization or its members beyond their current job requirements). This study investigated the relationship between principalâs transformational leadership and teachersâ Organizational Citizenship Behaviors and related motivating factors. Participants from a suburban school district completed a questionnaire based on their perceptions of their principalâs leadership characteristics and reflections upon their own practices. The results showed the strongest transformational leadership practice is individualized support. This practice demonstrated positive relationships with Organizational Citizenship Behavior, Organizational Concern, and Prosocial Values. The outcomes of this study are intended to assist school leaders in promoting sound citizenship behaviors through leadership practices as well as informing leadership preparation
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