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Search Results: 1 - 10 of 3793 matches for " Storage "
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Climate Change Impact on Sub-Surface Hydrology of Kaduna River Catchment  [PDF]
Haruna Garba, Abubakar Ismail, Rabia Lawal Batagarawa, Saminu Ahmed, Abdullahi Ibrahim, Faustinus Bayang
Open Journal of Modern Hydrology (OJMH) , 2013, DOI: 10.4236/ojmh.2013.33015
Abstract: This paper applied the use of a stochastic weather generator at the site of a hydrological model to simulate the impact of climate change on the sub-surface hydrological response of Kaduna River as a basis for a sustainable ground water development plan. Average time series of rainfall, temperature and gauge height observed readings were downscaled to the watershed flow volume and applied as forcing to simulate the ground water response as spatially lumped, ignoring the heterogeneous nature of the ground water aquifer. Future simulations indicate increase in base flow, ground storage and decrease soil storage throughout the summer and autumn months for the catchment.

The Effect of Storage Solutions on Mineral Content of Enamel  [PDF]
Asli Secilmis, Erhan Dilber, Nilgun Ozturk, Fatma Gokmen Yilmaz
Materials Sciences and Applications (MSA) , 2013, DOI: 10.4236/msa.2013.47053

Purpose: This study evaluated the influence of different storage times and storage solutions on the mineral content of enamel. Methods: Ninety enamel slabs were randomly divided into 2 groups of 45: a 45-day group and a 90-day group. Each of these main groups was further subdivided into 9 experimental groups of 5 slabs, and each subgroup was stored in a different storage solution. The mean percentage weights of 5 elements (calcium, potassium, sodium, phosphorus, and magnesium) presented in each enamel slab was measured after storage using inductively coupled plasmaatomic emission spectrometry. Two-way analysis of variance (ANOVA) and Turkey’s honestly significant difference tests were used to analyze differences between the

Predictive Prefetching for Parallel Hybrid Storage Systems  [PDF]
Maen M. Al Assaf
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2015, DOI: 10.4236/ijcns.2015.85018
Abstract: In this paper, we present a predictive prefetching mechanism that is based on probability graph approach to perform prefetching between different levels in a parallel hybrid storage system. The fundamental concept of our approach is to invoke parallel hybrid storage system’s parallelism and prefetch data among multiple storage levels (e.g. solid state disks, and hard disk drives) in parallel with the application’s on-demand I/O reading requests. In this study, we show that a predictive prefetching across multiple storage levels is an efficient technique for placing near future needed data blocks in the uppermost levels near the application. Our PPHSS approach extends previous ideas of predictive prefetching in two ways: (1) our approach reduces applications’ execution elapsed time by keeping data blocks that are predicted to be accessed in the near future cached in the uppermost level; (2) we propose a parallel data fetching scheme in which multiple fetching mechanisms (i.e. predictive prefetching and application’s on-demand data requests) can work in parallel; where the first one fetches data blocks among the different levels of the hybrid storage systems (i.e. low-level (slow) to high-level (fast) storage devices) and the other one fetches the data from the storage system to the application. Our PPHSS strategy integrated with the predictive prefetching mechanism significantly reduces overall I/O access time in a hybrid storage system. Finally, we developed a simulator to evaluate the performance of the proposed predictive prefetching scheme in the context of hybrid storage systems. Our results show that our PPHSS can improve system performance by 4% across real-world I/O traces without the need of using large size caches.
Stochastic Reservoir Systems with Different Assumptions for Storage Losses  [PDF]
Carter Browning, Hillel Kumin
American Journal of Operations Research (AJOR) , 2016, DOI: 10.4236/ajor.2016.65038
Abstract: Moran considered a dam whose inflow in a given interval of time is a continuous random variable. He then developed integral equations for the probabilities of emptiness and overflow. These equations are difficult to solve numerically; thus, approximations have been proposed that discretize the input. In this paper, extensions are considered for storage systems with different assumptions for storage losses. We also develop discrete approximations for the probabilities of emptiness and overflow.
Effects of Aggregate Extraction on Water Storage in the Pepin Creek Watershed, British Columbia, Canada  [PDF]
Yining Wang, Julie E. Wilson, Drew Brayshaw, Les M. Lavkulich
Natural Resources (NR) , 2017, DOI: 10.4236/nr.2017.87030
Abstract: Aggregate extraction in the Lower Fraser Valley of British Columbia, Canada, has affected the soil water storage of the Pepin Creek watershed. Although local government has set regulations for aggregate extraction projects to avoid negative environmental impacts, the gradual loss of soil materials and associated changes in vegetative cover has led to an alteration of the water balance within the watershed, which may affect surface or groundwater levels, and aquatic habitats. The study assessed the effects of aggregate extraction on the water storage of the Pepin Creek watershed and estimated that 25% of the surface area of the Canadian portion of the watershed has been affected by aggregate mining with an estimated loss of water storage of 10%. Evapotranspiration has decreased as a result of the removal of the vegetative cover. Precipitation has remained relatively constant over the study period but the annual discharge measured at Pepin Creek has decreased. Recommendations for enhancing environmental monitoring to better measure and understand ecological functions of the watershed during aggregate extraction are provided.
Retention of β-Carotene in Cream-Fleshed Sweetpotato-Based Complementary Food Stored in Different Containers under Simulated Tropical Temperature and Humidity  [PDF]
Francis Kweku Amagloh, Louise Brough, Janet L. Weber, Anthony N. Mutukumira, Allan Hardacre, Jane Coad
Food and Nutrition Sciences (FNS) , 2013, DOI: 10.4236/fns.2013.49A2004

The stability of β-carotene in cream-fleshed sweetpotato-based complementary food stored in three different containers under simulated tropical temperature of 32°C and 85% relative humidity in an environmental chamber for 24 weeks was investigated. The formulation stored in a metallised polyester film in a refrigerator (approximately 3.0°C and 95% relative humidity) retained about 81% of β-carotene at 24 weeks, with no significant change in the moisture content. The formulation stored in either a metallised polyester film or a translucent polypropylene container placed in the environmental chamber retained approximately half of the β-carotene at 24 weeks, with a slight increase in moisture content. However, the formulation held in a transparent low-density polyethylene bag had the lowest β-carotene retention (37%) and the highest moisture content at week 24. Within the limits of this study, it has been demonstrated that β-carotene in cream-fleshed sweetpotato-based complementary food was well retained when moisture uptake was minimised.

Room Temperature Storage of Hydrogen by Carbons  [PDF]
Mitsunori Furuya, Ayaka Yanagitsuru, Yuuya Matsuo, Kenji Ichimura
Advances in Chemical Engineering and Science (ACES) , 2013, DOI: 10.4236/aces.2013.33A3001

The adsorption states of hydrogen at around 300 K are found on carbons by means of thermal desorption measurements. This sorption ability has utility for energy technologies such as fuel cells.

The Conditions of Ovary Storage Affect the Quality of Porcine Oocytes  [PDF]
Matías Nicolás Tellado, Gabriel Martín Alvarez, Gabriel Carlos Dalvit, Pablo Daniel Cetica
Advances in Reproductive Sciences (ARSci) , 2014, DOI: 10.4236/arsci.2014.23007
Abstract: We studied the effect of different storage conditions of porcine ovaries (time, temperature) on the characteristics of the follicular fluid, immature oocyte quality, meiotic competence and in vitro fertilization of oocytes. Ovaries were stored for 2, 4 or 6 h at 3 different temperatures (15°C, 25°C or 35°C). As the storage time increased, pH and glucose concentration of the follicular fluid, percentage of live immature oocytes at germinal vesicle stage, oxidative activity and maturation rate decreased. At higher temperatures, pH and glucose concentration decreased, but oxidative activity and oocyte maturation rate increased. Lactate concentration and immature oocyte ROS production increased as storage time and temperature increased. The ovary storage for longer than 2 h at 25°C and 35°C resulted in low pH of the follicular fluid and high ROS level in immature oocytes. Such conditions seem to damage oocytes and impair their meiotic competence. A decrease in the oxidative activity caused by long time and/or low storage temperature may imply a decrease in oocyte vitality. In conclusion, in the porcine species, the transport of ovaries at 25°C and 35°C for 2 h are the best conditions to maintain adequate oocyte quality, meiotic competence and in vitro fertilization rates.
Security and Audit Trail Capabilities of a Facilitated Interface Used to Populate a Database System with Text and Graphical Data Using Widely Available Software  [PDF]
Kevin Beland, Kirk Larson, Thaine Rowley, Matt Mueller, Christopher Smith, Al Rizzo, Daniel Valandra, Marc Rendell
Journal of Software Engineering and Applications (JSEA) , 2014, DOI: 10.4236/jsea.2014.78066

In prior work we described techniques used to capture, store, and retrieve narrative data forms from a database using widely available off the shelf software. This concept makes use of the security and versioning features of database architecture together with those of image-supported electronic document information capture. We present herein the security and audit trail features of our construct. Unique usernames and passwords are used at the operating system level to enforce client validation and control access to the database system via an electronic signature using a Boolean logic algorithm. We used the database domain to capture original data and any changes to the data, developing an audit trail displaying identification information. Version controlled and change tracked electronic documents can be retrieved through the client side web interface to enable direct search operations, thus uncoupling the client from database query languages.

The Cooperative Game Research of Emergency Material Reserve in Beijing City  [PDF]
Xiangguo Ma, Huihui Su, Liming Sui
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.47006

The combination of government reserve and enterprise reserve is one of the main models of emergency material storage in Beijing City. In recent years, China was advocating the government and enterprises to establish multi level and multi mode of the storage mode to save cost and improve efficiency. This paper uses mathematical model to establish a cooperative game premise condition, then analyses the emergency material storage cooperative game between the government and the enterprise and establishes binding cost apportionment and punishment measures to get a stable cooperation, so that both sides obtain the biggest benefit. Finally, based on the game of government and enterprise cooperation establish cost lowest Beijing emergency materials storage and transportation mode.

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