273 research outputs found
Responses of User to New Media Application in Mpu Tantular Museum, East java
The purpose of this paper is to measure user’s responses of the New Media application. An application, called CD Interaktif, is installed to the Museum Mpu Tantular of East Java. In measuring the responses, a survey was conducted to the user of CD Interaktif. The finding shows that user encounter difficulties in accessing the application, user has received acceptable knowledge, and shows expectations from the respected application
Ammonia and Nitrate Nitrogen in the Soil Profile and Its Relation to Various Nitrogen Treatments On Dry-land Winter Wheat
In a dry-land winter wheat field, patterns of mineral nitrogen distributions were investigated before and after fertilizer additions.
Large differences in the added mineral nitrogen recoverable three weeks after treatment were found to be specific to nitrogen source and treatment within source.
Initial losses averaged 50 percent for urea treatments, 40 percent for calcium nitrate treatments, and varied from a loss of 18 percent to a gain of 22 percent for ammonium nitrate treatments. Ammonium sulfate proved the most variable with a 36 percent average loss for the before-planting treatment and a 61 percent gain for the after-planting treatment.
This initial gain and loss behavior correlated at the 2 percent level of significance with the subsequent grain yield (r=0.774, 8 df), and was still discernable in soil test results of late April, where total mineral nitrogen depletion since before treatment correlated positively at the 10 percent level of significance with the nitrogen loss found 3 weeks after treatment.
For a small sample of nine plots, a late July sampling revealed that depletions of mineral nitrogen since April were much more predictive of grain yields than were the actual April-N levels (r2=0.787 versus r2=0.460). This result confirms the large role played by differential moisture stress regimes in the field, since depletions during the drying season of late spring and early summer depend on the availability of moisture.
Initial fertilizer behavior, determining fertilizer losses before the onset of crop usage, and a favorable later moisture regime were seen as the two largest determinants of yield under the conditions of this experiment. Since the latter factor is largely beyond further control, the former is the only factor open to manipulation. Generally, after planting treatments were lower in initial losses of mineral nitrogen, and also generally provided somewhat higher surface mineral nitrogen levels in early spring, which was found to be weakly correlated with yield. Surface accumulations in early spring can only be beneficial if sufficient spring moisture is available for downward transport into the root zone, however, and a drier spring than prevailed during this experiment could forseeably reverse this relationship by keeping such surface nitrogen accumulations from becoming available to the plant in spring
Differences and Similarities across Four Countries
Cyberbullying is a ubiquitous topic when considering young people and internet
and communication technologies (ICTs). For interventional purposes, it is
essential to take into account the perspective of adolescents. This is the
reason why our main focus is (1) investigating the role of different criteria
in the perceived severity of cyberbullying incidents, and (2) examining the
differences between countries in the perceived severity of cyberbullying. The
sample consisted of 1,964 adolescents (48.2% girls) from middle and high
schools of four different countries, i.e., Estonia, Italy, Germany, and
Turkey. The participants' age ranged from 12 to 20 years old with a mean age
of 14.49 (SD = 1.66) years. To assess perceived severity, participants rated a
set of 128 scenarios, which systematically included one or more of five
criteria (intentionality, repetition, imbalance of power, public vs. private,
and anonymity) and represented four types of cyberbullying behaviors
(Written—Verbal, Visual, Exclusion, Impersonation). The role of different
criteria was analyzed using the Exploratory Structural Equation Modeling
(ESEM). Results showed a similar structure across the four countries
(invariant except for the latent factors' means). Further, criteria of
imbalance of power and, to a lesser extent, intentionality, anonymity, and
repetition always in combination, were found to be the most important criteria
to define the severity of cyberbullying. Differences between countries
highlighted specific features of Turkish students, who perceived all scenarios
as more severe than adolescents from other countries and were more sensitive
to imbalance of power. German and Italian students showed an opposite
perception of anonymity combined with intentionality. For Italian
participants, an anonymous attack was less threatening than for participants
of other countries, whereas for German students anonymity caused more
insecurity and fear. In addition, Italian adolescents were more perceptive of
the criterion of intentionality. Finally, Estonian adolescents did not show
strong differences in their factor scores compared to adolescents from the
other countries
Sleep and cognitive performance:cross-sectional associations from the UK Biobank
Objective: The relationship between insomnia symptoms and cognitive performance is unclear, particularly at the population level. We conducted the largest examination of this association to date through analysis of the UK Biobank, a large population-based sample of adults aged 40-69 yrs. We also sought to determine associations between cognitive performance and self-reported chronotype, sleep medication use, and sleep duration. Methods: This cross-sectional, population-based study involved 477,529 participants, comprising 133,314 with frequent insomnia symptoms (age: 57.4 ± 7.7 yrs; 62.1% female) and 344,215 controls without (age: 56.1 ± 8.2 yrs; 52.0% female). Cognitive performance was assessed through a touchscreen test battery probing reasoning, basic reaction time, numeric memory, visual memory and prospective memory. Adjusted models included relevant demographic, clinical and sleep variables. Results: Frequent insomnia symptoms were associated with cognitive impairment in unadjusted models, however these effects were reversed after full adjustment, leaving those with frequent insomnia symptoms showing statistically better cognitive performance over those without. Relative to intermediate chronotype, evening chronotype was associated with superior task performance, while morning chronotype was associated with the poorest performance. Sleep medication use and both long (>9hrs) and short (<7hrs) sleep duration were associated with impaired performance. Conclusions: Our results suggest that after adjustment for potential confounding variables, frequent insomnia symptoms may be associated with a small statistical advantage, which is unlikely to be clinically meaningful, on simple neurocognitive tasks. Further work is required to examine mechanistic underpinnings of an apparent evening chronotype advantage in cognitive performance, as well as impairment associated with morning chronotype, sleep medication use, and sleep duration extremes
Objectives, design and main findings until 2020 from the Rotterdam Study
The Rotterdam Study is an ongoing prospective cohort study that started in 1990 in the city of Rotterdam, The Netherlands. The study aims to unravel etiology, preclinical course, natural history and potential targets for intervention for chronic diseases in mid-life and late-life. The study focuses on cardiovascular, endocrine, hepatic, neurological, ophthalmic, psychiatric, dermatological, otolaryngological, locomotor, and respiratory diseases. As of 2008, 14,926 subjects aged 45 years or over comprise the Rotterdam Study cohort. Since 2016, the cohort is being expanded by persons aged 40 years and over. The findings of the Rotterdam Study have been presented in over 1700 research articles and reports. This article provides an update on the rationale and design of the study. It also presents a summary of the major findings from the preceding 3 years and outlines developments for the coming period
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Using geologic conditions and multiattribute decision analysis to determine the relative favorability of selected areas for siting a high-level radioactive waste repository
A method is presented for determining the relative favorability of geologically complex areas for isolating high-level radioactive wastes. In applying the method to the northeastern region of the United States, seismicity and tectonic activity were the screening criteria used to divide the region into three areas of increasing seismotectonic risk. Criteria were then used to subdivide the area of lowest seismotectonic risk into six geologically distinct subareas including characteristics, surface-water and groundwater hydrology, potential human intrusion, site geometry, surface characteristics, and tectonic environment. Decision analysis was then used to identify the subareas most favorable from a geologic standpoint for further investigation, with a view to selecting a site for a repository. Three subareas (parts of northeastern Vermont, northern New Hampshire, and western Maine) were found to be the most favorable, using this method and existing data. However, because this study assessed relative geologic favorability, no conclusions should be drawn concerning the absolute suitability of individual subareas for high-level radioactive waste isolation. 34 refs., 7 figs., 20 tabs
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