Digital Commons Network^™

The Effect Of A New Gelatinous Elastomers Cushion On Reducing Pressure And Temperature, Mu-Jung Kao, Yang-Hwei Tsuang, Chi-Jou Kuo, Jen-Ling Chou, Hung-Wen Wei, Mei-Wun Tsai

Rehabilitation Practice and Science

Objective: The aim of this study was to analyze the effectiveness of a new air cell cushion (Elaston cushion) made of gelatinous elastomers, a newly developed material with a novel structure on reducing pressure and temperature.Methods: We compared the pressure and thermal responses of the Elastone cushion to three other available cushions (foam, gel-filled and air-filled villous) and four regular wooden or spongy chair seats. The skin temperature at the buttocks was also continuously measured for eight-hours sitting. Results: The Elastone cushion reduced the peak pressure (39.7 mmHg) compared with foam (60.0 mmHg), gel-filled (60.3 mmHg) and air-filled cushions (69.3 …

Type Ii Protein Arginine Methyltransferase 5 (Prmt5) Is Required For Circadian Pperiod Determination In Arabidopsis Thaliana, Sunghyun Hong, Hae-Ryoung Song, Kerry Lutz, Randall A. Kerstetter, Todd P. Michael, C. Robertson Mcclung

Dartmouth Scholarship

Posttranslational modification is an important element in circadian clock function from cyanobacteria through plants and mammals. For example, a number of key clock components are phosphorylated and thereby marked for subsequent ubiquitination and degradation. Through forward genetic analysis we demonstrate that protein arginine methyltransferase 5 (PRMT5; At4g31120) is a critical determinant of circadian period in Arabidopsis. PRMT5 is coregulated with a set of 1,253 genes that shows alterations in phase of expression in response to entrainment to thermocycles versus photocycles in constant temperature. PRMT5 encodes a type II protein arginine methyltransferase that catalyzes the symmetric dimethylation of arginine residues (Rsme2). …

Detection Of Free Living Amoebae, Acanthamoeba And Naegleria, In Swimming Pools, Malaysia, Init Ithoi

Init Ithoi

This study reports the detection of Acanthamoeba and Naegleria species in 14 swimming pools around Petaling Jaya and Kuala Lumpur, Malaysia. Sampling was carried out at 4 sites (the platforms (P), wall (W), 1 meter from the wall (1) and middle (2)) of each swimming pool. These free living amoebae (FLA) were detected under light and inverted microscopes after being cultured on the surface of non-nutrient agar lawned with Escherichia coli. Acanthamoeba species were detected in higher number of culture plates from all sampling sites of all the swimming pools. While Naegleria, were detected in fewer culture plates at 3 …

Comparative Study Of Temperatures Used In Silicone Impregnation Of Porcine Hearts Plastination, Damri Darawiroj, Adisorn Adirekthaworn, Sayamon Srisuwattanasakul, Kongkiat Srisuwattanasakul

The Thai Journal of Veterinary Medicine

Forced impregnation process is normally performed under vacuum at freezing temperature which requires expensive plastination apparatus. To reduce the cost in the plastination process, forced impregnation of porcine hearts under two different environments, which are at the freezing temperature (-20oC) and at room temperature (22-25oC), was compared. Twelve porcine hearts were collected from a slaughter house, and divided into the groups, six in each, and subjected to be plastinated by S10 standard technique at the two temperatures. Although the forced impregnation at room temperature, also the curing process, was more time-consuming, all hearts from both groups produced satisfying plastinated specimens. …

Assessing Linkages Among Landscape Characteristics, Stream Habitat, And Macroinvertebrate Communities In The Idaho Batholith Ecoregion, Andrew C. Hill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Understanding the composition of lotic communities and the landscape processes and habitat characteristics that shape them is one of the main challenges confronting stream ecologists. In order to better understand the linkages among landscape processes, stream habitat, and biological communities and to understand how accurately our measurements represent important factors influencing biological communities, it is important to test explicit hypotheses regarding these linkages. Increasing our understanding of aquatic communities in a hierarchical context and recognizing how well our measurements represent factors structuring aquatic communities will help managers better evaluate the influence of land management practices on aquatic ecosystems, direct conservation …

The Effectiveness Of Damage Arrestment Devices In Delaying Fastener-Hole Interaction Failures In Carbon Fiber Polyurethane Foam Composite Sandwich Panels Subjected To Static And Dynamic Loading Under Increased Temperatures, Dominic E. Surano

Master's Theses

A study was conducted to investigate simple, cost-effective manufacturing techniques to delay skin-core delamination, micro-buckling and bearing stress failures resulting from fastener-hole interactions. Composite sandwich panels, with and without damage arrestment devices (DADs), were subjected to monotonic compression at a rate of 5mm per second, and compression-compression fatigue at 50% yield at an amplitude of 65%, under temperatures of 75, 100, 125, 150, 175, and 200 °F.

The sandwiches tested were composed of two-layer cross-weave carbon fiber facesheets, a polyurethane foam core, and an epoxy film adhesive to join the two materials. The most successful method to delay the aforementioned …

A Comparison Of Cumulative-Germination Response Of Cheatgrass (Bromus Tectorum L.) And Five Perennial Bunchgrass Species To Simulated Field-Temperature Regimes, Stuart P. Hardegree, Corey A. Moffet, Bruce A. Roundy, Thomas A. Jones, Stephen J. Novak, Patrick E. Clark, Frederick B. Pierson, Gerald N. Flerchinger

Biology Faculty Publications and Presentations

Cheatgrass (Bromus tectorum L.) has come to dominate millions of hectares of rangeland in the Intermountain western United States. Previous studies have hypothesized that one mechanism conferring a competitive advantage to this species is the ability to germinate rapidly at low temperatures in the fall, winter and spring and, therefore, initiate growth and establishment more rapidly than more desirable perennial bunchgrass species. In this experiment, we developed thermal-germination-response models for multiple seedlots of cheatgrass and five perennial grass species. We conducted sensitivity analysis on potentialcumulative- germination response to a 38-y simulation of field-variable conditions of seedbed temperature and moisture. …

A Study Of The Effect Of Vibration On Railroad Bearing Temperature, Bertha Alicia Gonzalez

Theses and Dissertations - UTB/UTPA

An on-track collaborative field test and laboratory experiments were conducted in order to determine the relationship between abrupt rises in surface temperature of a railroad bearing and vibration signatures captured during the experiments. The collaborative field test was conducted in order to investigate the root cause for this abrupt temperature change known as bearing temperature trending. The research presented in this thesis will show that temperature trending is correlated to an increase in the magnitude of vibration within the bearing and the fundamental frequencies that are generated by the internal components of a rotating bearing assembly. Distinct vibration mechanisms are …

Time, Temperature And Species Interactions In A Duckweed-Herbivore Mesocosm, Ian Waterman

School of Biological Sciences: Dissertations, Theses, and Student Research

Species interactions within a community are impacted by a variety of abiotic factors. Temperature is known to alter population dynamics such that direct and indirect interactions between populations within a community are affected. Here I investigate the effect of temperature change on species interactions within a duckweed-herbivore mesocosm. Multiple communities were constructed, from a single population of duckweed, to two populations of duckweed consumed by aphids. In the one-predator two-prey web we predicted mutually positive indirect effects between duckweed populations during the first generation of growth. As aphid populations respond numerically to more abundant prey, mutually negative and asymmetric indirect …

Fish Communities On The World's Warmest Reefs: What Can They Tell Us About The Effects Of Climate Change In The Future?, David A. Feary, John A. Burt, Andrew G. Bauman, Paolo Usseglio, Peter F. Sale, Georgenes Cavalcante

Marine & Environmental Sciences Faculty Articles

To examine the role of climatic extremes in structuring reef fish communities in the Arabian region, reef fish communities were visually surveyed at four sites within the southern Persian Gulf (also known as the Arabian Gulf and The Gulf), where sea-surface temperatures are extreme (range: 12–35° C annually), and these were compared with communities at four latitudinally similar sites in the biogeographically connected Gulf of Oman, where conditions are more moderate (range: 22–31° C annually). Although sites were relatively similar in the cover and composition of coral communities, substantial differences in the structure and composition of associated fish assemblages were …

Local People's Perception On Climate Change, Its Impact And Adaptation Practices In Himalaya To Terai Regions Of Nepal, Krishna R. Tiwari, Kashab D. Awasthi, Mohan K. Balla, Bishal K. Sitaula

Himalayan Research Papers Archive

The study showed that average temperature has increased from 0.6 to 0.980 C over the last 30 years and precipitation is characterized by large inter-annual variability with substantial decrease in amount over the last five years. The annual temperature increasing trend followed 0.055>0.0455>0.035>0.02 0C yr-1 from Middle Mountain, Siwlik, Himalayan and Teari regions respectively. More than 80 percent HHs responded that they have perceived increased temperature and expressed low amount snowfall in High mountain and rainfall in Mid mountain and Terai region over the last five years. Low amount of snow fall in the Himalayan region affected …

Temperature And Variability Of Three Ionian Volcanoes, Daniel R. Allen

Theses and Dissertations

Cassini spacecraft images of Io obtained during its flyby of Jupiter in late 2000 and early 2001 were used to determine the lava composition and eruption style of three faint hotspots, Pillan, Wayland, and Loki. We found a maximum color temperature of 1130+/-289 K for Pillan and maximum color temperatures of 1297+/-289 K and 1387+/-287 K for Wayland and Loki, respectively. These temperatures are suggestive of basaltic lava. The temperatures with the best signal-to-noise ratios also suggested basaltic lava and were found to be 780+/-189 K, 1116+/-250 K, and 1017+/-177 K for Pillan, Wayland, and Loki, respectively. Pillan showed increased …

Factors Affecting Ammonia Volatilization From Broiler Litter, Dana Mcgee Miles

Theses and Dissertations

Loss of ammonia from broiler litter degrades air quality, decreases litter fertilizer value, and can have negative health consequences for birds and their caretakers. Rates of NH3 emission from broiler houses are complicated by interrelated management and environmental factors such as air temperature, humidity, house style, ventilation rate,bird age, litter conditions, litter characteristics, and cleanout schedule. Wide variations inemission rates necessitate further investigation of litter characteristics and abatement techniques. The research was designed to clarify the impact of moisture effects that are critical to emissions for poultry litter, in conjunction with bedding type and temperature. Experiments were conducted on litter …

Seed Coating, Seed Treatment, And Temperature Effects On Germination Of Five Seeded Bermudagrass Cultivars, John Morris Layton

Theses and Dissertations

The use of improved seeded bermudagrasses (SB) has increased. All new cultivars are marketed as coated seed. As germination of many of these new cultivars is less than ideal, questions arise as to the effect coatings have on germination. Five SB cultivars were selected for a series of germination studies. The first study compared coated and uncoated samples of the five cultivars for germination response to six temperature regimes. Overall, commercial seed coating did not affect SB germination. However, both temperature regime and cultivar were significant factors. In a second study, three seed treatments were investigated across three temperature regimes …

Reversible Record Breaking And Variability: Temperature Distributions Across The Globe, Amalia Anderson, Alexander Kostinski

Department of Physics Publications

Based on counts of record highs and lows, and employing reversibility in time, an approach to examining natural variability is proposed. The focus is on intrinsic variability; that is, variance separated from the trend in the mean. A variability index α is suggested and studied for an ensemble of monthly temperature time series around the globe. Deviation of 〈α〉 (mean α) from zero, for an ensemble of time series, signifies a variance trend in a distribution-independent manner. For 15 635 monthly temperature time series from different geographical locations (Global Historical Climatology Network), each time series about a …

Evaluating The Impact Of Climate Change On Global Hpai H5n1 Outbreaks, Zhijie Zhang, Dongmei Chen, Wenbao Liu, Lei Wang

International Congress on Environmental Modelling and Software

Highly pathogenic avian influenza viruses H5N1 have spread throughout Asia, Europe, and Africa in the past decade, raising serious worldwide concerns about a potential new pandemic. Many studies have investigated the spread of the HPAI H5N1 virus and discussed its possible risk factors. However, the climate factor, which can affect the whole process of H5N1 outbreaks, has been greatly ignored. The objective of this preliminary study is to use a GIS-based approach to explore the potential impacts of temperature change on H5N1 outbreaks. We have divided the outbreaks into five epidemic waves. Although the temperature ranges of different epidemic waves …

Modeling Dynamical Temperature Influence On Tick Ixodes Scapularis Population, Xiaotian Wu, Venkata R S K Duvvuri, Jianhong Wu

International Congress on Environmental Modelling and Software

Lyme disease has been recognised as one of the emerging vector borne diseases in Canada. Ticks, Ixodes scapularis SAY, play a major role as vectors of Lyme disease causative agent Borrelia burgdorferi. Ticks become infected with Borrelia while feeding on the primary hosts (mice, squirrels, shrews, and other small vertebrates). Deers are primary source of nourishment for each gravid female I. scapularis and are fundamental to the tick establishment without infection. The life cycle of tick, I. scapularis, is very complex and takes nearly two years to reach adult stage from egg. Studies have shown that tick life cycle is …

The Climatic Change Impact In Water Potential Processe On The Albanian Hydrographic River Network, Niko Pano, Alfred Frasheri, Bardhyl Avdyli

International Congress on Environmental Modelling and Software

The general cascade impt of climatic change on the water potential processe in the Albanian hydrographic river network is presented in this paper. Hydrological change impact in the sediment regime of the Albanian river system as an important part of the paper is present. The climatic change impact has been analysed in two principal aspects. Firstly by evaluation of the global water potential of the Albanian river system and secondly, by the influence of the climatic change in the multi-annual variation of this potential in the territory catchment area of this system.The climatic change impact processes in the Albanian hydrographic …

Statistical Picture Of Climate Changes In Central Asia: Temperature, Precipitation, And River Flow, Darya Savitskaya

International Congress on Environmental Modelling and Software

The research presented in this paper is dedicated to the temperature, precipitationand rivers runoff observations in Central Asia. Conclusions about the current situation andthe impact of future climate change in the region based on observations from more than 600meteorological stations during the last hundred years. Special interest was paid to theclimatic changes that occurred in the region during the first seven years of the 21 century.The changes in runoff of major Central Asian rivers, such as Naryn, Karadarya, Zerafshan,Amu Darya and its tributary Vakhsh, since the beginning of the last century were studied.Trends in the climatologic and hydrologic data were …

Evaluating The Impact Of Climate Change On Global Hpai H5n1 Outbreaks, Zhijie Zhang, Dongmei Chen, Wenbao Liu, Lei Wang

International Congress on Environmental Modelling and Software

Highly pathogenic avian influenza viruses H5N1 have spread throughout Asia, Europe, and Africa in the past decade, raising serious worldwide concerns about a potential new pandemic. Many studies have investigated the spread of the HPAI H5N1 virus and discussed its possible risk factors. However, the climate factor, which can affect the whole process of H5N1 outbreaks, has been greatly ignored. The objective of this preliminary study is to use a GIS-based approach to explore the potential impacts of temperature change on H5N1 outbreaks. We have divided the outbreaks into five epidemic waves. Although the temperature ranges of different epidemic waves …

Modeling Dynamical Temperature Influence On Tick Ixodes Scapularis Population, Xiaotian Wu, Venkata R S K Duvvuri, Jianhong Wu

International Congress on Environmental Modelling and Software

Lyme disease has been recognised as one of the emerging vector borne diseases in Canada. Ticks, Ixodes scapularis SAY, play a major role as vectors of Lyme disease causative agent Borrelia burgdorferi. Ticks become infected with Borrelia while feeding on the primary hosts (mice, squirrels, shrews, and other small vertebrates). Deers are primary source of nourishment for each gravid female I. scapularis and are fundamental to the tick establishment without infection. The life cycle of tick, I. scapularis, is very complex and takes nearly two years to reach adult stage from egg. Studies have shown that tick life cycle is …

The Climatic Change Impact In Water Potential Processe On The Albanian Hydrographic River Network, Niko Pano, Alfred Frasheri, Bardhyl Avdyli

International Congress on Environmental Modelling and Software

The general cascade impt of climatic change on the water potential processe in the Albanian hydrographic river network is presented in this paper. Hydrological change impact in the sediment regime of the Albanian river system as an important part of the paper is present. The climatic change impact has been analysed in two principal aspects. Firstly by evaluation of the global water potential of the Albanian river system and secondly, by the influence of the climatic change in the multi-annual variation of this potential in the territory catchment area of this system.The climatic change impact processes in the Albanian hydrographic …

Statistical Picture Of Climate Changes In Central Asia: Temperature, Precipitation, And River Flow, Darya Savitskaya

International Congress on Environmental Modelling and Software

The research presented in this paper is dedicated to the temperature, precipitationand rivers runoff observations in Central Asia. Conclusions about the current situation andthe impact of future climate change in the region based on observations from more than 600meteorological stations during the last hundred years. Special interest was paid to theclimatic changes that occurred in the region during the first seven years of the 21 century.The changes in runoff of major Central Asian rivers, such as Naryn, Karadarya, Zerafshan,Amu Darya and its tributary Vakhsh, since the beginning of the last century were studied.Trends in the climatologic and hydrologic data were …

Differences In The Susceptibility To Black Band Disease Between Two Species Of The Genus Diploria On The Reefs Of Bermuda, Kristin Kuehl

FIU Electronic Theses and Dissertations

On the reefs of Bermuda, the coral Diploria labyrinthiformis is rarely infected with black band disease (BBD) while BBD-infected colonies of D. strigosa are common. This study investigated several possible explanations for the documented difference in BBD prevalence including: 1) temperature and light conditions differentially affect the progression of the disease among these two species; 2) the bacterial communities associated with each species are different and 3) the bacterial composition of BBD in Bermuda is unique from that of other geographical regions where D. labyrinthiformis has been reported with BBD. Results suggest that light and temperature are important variables in …

Upper Thermal Tolerances Of Early Life Stages Of Freshwater Mussels, Tamara J. Pandolfo, W. Gregory Cope, Consuelo Arellano, Robert B. Bringolf, M. Christopher Barnhart

College of Natural and Applied Sciences

Freshwater mussels (order Unioniformes) fulfill an essential role in benthic aquatic communities, but also are among the most sensitive and rapidly declining faunal groups in North America. Rising water temperatures, caused by global climate change, industrial discharges, drought, or land development, could further challenge imperiled unionid communities. The aim of our study was to determine the upper thermal tolerances of the larval (glochidia) and juvenile life stages of freshwater mussels. Glochidia of 8 species of mussels were tested: Lampsilis siliquoidea, Potamilus alatus, Ligumia recta, Ellipsaria lineolata, Lasmigona complanata, Megalonaias nervosa, Alasmidonta varicosa, and Villosa delumbis. Seven of these species also …

Robust Isothermal Electric Control Of Exchange Bias At Room Temperature, Xi He, Yi Wang, Christian Binek, Peter A. Dowben

Christian Binek Publications

Voltage-controlled spin electronics is crucial for continued progress in information technology. It aims at reduced power consumption, increased integration density and enhanced functionality where non-volatile memory is combined with highspeed logical processing. Promising spintronic device concepts use the electric control of interface and surface magnetization. From the combination of magnetometry, spin-polarized photoemission spectroscopy, symmetry arguments and first-principles calculations, we show that the (0001) surface of magnetoelectric Cr2O3 has a roughness-insensitive, electrically switchable magnetization. Using a ferromagnetic Pd/Co multilayer deposited on the (0001) surface of a Cr2O3 single crystal, we achieve reversible, room-temperature isothermal switching of the exchange-bias field between positive …

Irrigation Leak Detection: Using Flow Rate Sensors To Detect Breaks In An Irrigation System, Adam Openshaw, Kalvin Vu

Computer Engineering

This report details the exploration and invention of a mechanism that can detect breaks in an irrigation system. With the ultimate goal of conserving water, we have designed an inexpensive, self sustaining flow rate monitor that can be used to identify anomalies in an irrigation system and wirelessly communicate the status of the system to a base station. Our implementation can also determine the direction of the anomaly based on the nature of the anomaly itself. This means that multiple monitors can be used to pinpoint the location of a break within the system in addition to merely detecting its …

Quantum Criticality Due To Incipient Phase Separation In The Two-Dimensional Hubbard Model, Ehsan Khatami, K. Mikelsons, D. Galanakis, A. Macridin, J. Moreno, R. Scalettar, M. Jarrell

Faculty Publications

We investigate the two-dimensional Hubbard model with next-nearest-neighbor hopping, t′, using the dynamical cluster approximation. We confirm the existence of a first-order phase-separation transition terminating at a second-order critical point at filling nc(t′) and temperature Tps(t′). We find that as t′ approaches zero, Tps(t′) vanishes and nc(t′) approaches the filling associated with the quantum critical point separating the Fermi liquid from the pseudogap phase. We propose that the quantum critical point under the superconducting dome is the zero-temperature limit of the line of second-order critical points.

Effect Of Ground Temperature And Nest Differences On Productivity And Worker Size In Atta Cephalotes (Hymenoptera Formicidae), May 2010, Hannah Fried-Petersen

Tropical Ecology and Conservation [Monteverde Institute]

Atta cephalotes is one of the few species that does better in grassy pastures and secondary growth and their abundance, persistent foraging, and that they collect from a lot of different tree species has earned them the reputation of huge agricultural pests. A. cephalotes are poikilotherms meaning their internal body temperature fluctuates greatly with temperature. For this reason, it has been purported that these leaf-cutter ants will only collect leaf fragments at certain temperatures and that different sized workers have different temperature tolerances. The objective of this study was to look for relationships between temperature, productivity, and worker size in …

Mathematical Modeling Of Light Utilization And The Effects Of Temperature Cycles On Productivity In A Steady-State Algal Photobioreactor, Peter Edwin Zemke

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The work presented here investigated two methods of improving productivity in microalgal photobioreactors: applying temperature cycles intended to maximize photosynthesis and minimize respiration, and development of a mathematical model that predicts improvements in photon utilization using temporal light dilution (flashing).

The experiments conducted on diurnal temperature cycles with Dunaliella tertiolecta in 30-L outdoor photobioreactors showed that a properly chosen temperature cycle can improve mass and energy productivity by 18% over an identical photobioreactor with a constant temperature. However, excessively large temperature cycle amplitudes reduced productivity. A 4-7% increase in energy content was observed in microalgae exposed to temperature cycles. The …