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Articles 31 - 60 of 20017
Full-Text Articles in Entire DC Network
Potential Use Of Waterguard As A Disinfectant For Domestic Water Use, Yohana L
Potential Use Of Waterguard As A Disinfectant For Domestic Water Use, Yohana L
Tanzania Journal of Engineering and Technology (TJET)
been identified as an alternative method for treatment of domestic drinking water. The aim of this study was to investigate the effectiveness of Water Guard in disinfecting drinking water from different sources drawn from Kinondoni district, Dar es Salaam as well as to establish appropriate dosage that can be used during the treatment. Results showed that, a dose of 4.0mL per 20 litrer of water guard is sufficient for disinfection of urban water sources. The above prescribed doses provide 100% disinfection efficiency with residue chlorine of less than 0.3mg/l. Water with turbidity values of 30-35 NTU, chlorine dosage of 8mL/20 …
Investigation Of The Effect Of Particle Size On Groundnut-Oil Solvent Extraction, S Manyele
Investigation Of The Effect Of Particle Size On Groundnut-Oil Solvent Extraction, S Manyele
Tanzania Journal of Engineering and Technology (TJET)
An investigation of the effect of particle size on the performance of vegetable oil recovery by solvent extraction is reported. Experiments were conducted using soxhlet extractor, groundnuts and n-hexane. Samples were grouped into mean particle sizes of 0.25, 0.75, 1.3, 3.3, and 7.5 mm using standard sieves. The effect of particle size was studied for extraction time intervals of 1, 2, 3, 4, 5 and 8 hours. The oil yield, oil recovered per kg solvent used, kg solvent lost per unit time, and the rate of extraction (kg oil recovered per hour) decreased with increasing particle size. Meanwhile, the percent …
Protecting Marine Biodiversity In The South Eastern Pacific Ocean, Javier P. Gonzalez
Protecting Marine Biodiversity In The South Eastern Pacific Ocean, Javier P. Gonzalez
World Maritime University Dissertations
No abstract provided.
A Selective Study On Effectiveness Of The International Legislation On Maritime Secury : Gulf Of Guinea A Case Study, Stanley Chuka Igwe
A Selective Study On Effectiveness Of The International Legislation On Maritime Secury : Gulf Of Guinea A Case Study, Stanley Chuka Igwe
World Maritime University Dissertations
No abstract provided.
A Comparative Study Of Implementation Of Existing Measures For Oil Spill Response In Northern Indian Ocean And Investigate Improvment Mechanisms, Deepak R. Sharma
A Comparative Study Of Implementation Of Existing Measures For Oil Spill Response In Northern Indian Ocean And Investigate Improvment Mechanisms, Deepak R. Sharma
World Maritime University Dissertations
No abstract provided.
Transarctic Routes : Impact And Opportunities For Ports, Adil Rashid
Transarctic Routes : Impact And Opportunities For Ports, Adil Rashid
World Maritime University Dissertations
No abstract provided.
Effective Implementation Of Emission Control Area Towards Cleaner Shipping Operations : Focusing On Sulphur Oxides (Sox) Emission Reducation, Fajar Nugraha
World Maritime University Dissertations
No abstract provided.
Proactive Maritime Safety : Concepts And Applications, Ali Soltani
Proactive Maritime Safety : Concepts And Applications, Ali Soltani
World Maritime University Dissertations
No abstract provided.
Assessment Of Alternative Maritime Power (Cold Ironing) And Its Impact On Port Management And Operations., Richard Fiadomor
Assessment Of Alternative Maritime Power (Cold Ironing) And Its Impact On Port Management And Operations., Richard Fiadomor
World Maritime University Dissertations
No abstract provided.
Improving Maritime Community Communication Through Information Communication Technology : A Feasibility Case Study At The Myanmar Maritime University, May Soe Aung
World Maritime University Dissertations
No abstract provided.
Application Of Hfacs Tool For Analysis Of Investigation Reports Of Accidents Involving Containerized Dangerous Goods, Di Ren
World Maritime University Dissertations
No abstract provided.
A Selective Appraisal Of The P&I Insurance System With Special Reference To Claims For Personal Injury, Illness And Loss Of Life, Mya Thida Lin
A Selective Appraisal Of The P&I Insurance System With Special Reference To Claims For Personal Injury, Illness And Loss Of Life, Mya Thida Lin
World Maritime University Dissertations
No abstract provided.
Identification Of Unbalanced Forces And Foundation Parameters Of Rotating Machines From Vibration Measurements, Nalitolela G
Identification Of Unbalanced Forces And Foundation Parameters Of Rotating Machines From Vibration Measurements, Nalitolela G
Tanzania Journal of Engineering and Technology (TJET)
A technique is described to use measured vibration data of a rotating machine and its foundation to identify unbalanced forces, stiffness and damping parameters of the mountings, and the parameters of the foundation. It is based on an idealisation treating the rotor, the machine structure and the foundation as rigid masses supported by springs and dampers. Operational vibration data of the machine and its foundation before and after the rotating unbalanced forces are perturbed by adding unbalanced mass to the rotor are used in the identification procedure. Once the parameters are identified, dynamic forces transmitted to the foundation can be …
The Multivariate Statistical Analysis Of Abiotic Parameters Of The Lake Tanganyika Sub Catchment, Hudson Nkotagu
The Multivariate Statistical Analysis Of Abiotic Parameters Of The Lake Tanganyika Sub Catchment, Hudson Nkotagu
Tanzania Journal of Engineering and Technology (TJET)
Results from multivariate statistical analysis of abiotic parameters conducted during the dry season at 20 accessible sites on 8 rivers, 2 lakes and a dam covering the Lake Tanganyika sub catchment are discussed. Standard methods were used to determine the levels of abiotic parameters from water samples. Physical parameters including DO, EC, Eh, turbidity, temperature, pH and secchi transparency were measured in situ while chlorophyll a was determined in the laboratory. Nutrients such as NO3-, SiO2, PO4 3- and Fe2+ were determined along with HCO3-. Factor analysis resulted in four factors including increased primary productivity, redox conditions, dissolution, and reduction …
An Equation For Estimating The (R) Usle Slope Steepness Factors, Mathew Mulemgera
An Equation For Estimating The (R) Usle Slope Steepness Factors, Mathew Mulemgera
Tanzania Journal of Engineering and Technology (TJET)
Abstract Currently three equations are used for calculating slope steepness factor for the Revised Universal Soil Loss Equation (RUSLE); one for slopes less than nine percent, the second for slopes equal or greater than nine percent, and the third equation that has been proposed for use in China for slopes equal or greater than 17 %. The three equations have linear relationships between slope steepness factor, S and the sine of the slope angle, θ. The three equations under predict the factor, S when used on slope steepness beyond the data sets used to develop them. In addressing this problem …
Special Section Of Early And Unpublished Work: Haunted Coast, Dirk Aardsma
Special Section Of Early And Unpublished Work: Haunted Coast, Dirk Aardsma
Jeffers Studies
No abstract provided.
Optimal Temperatures For Growth And Upper Thermal Tolerance Of Juvenile Northern Leatherside Chub, Eric J. Billman, Eric J. Wagner, Ronney E. Arndt, Erin Vandyke
Optimal Temperatures For Growth And Upper Thermal Tolerance Of Juvenile Northern Leatherside Chub, Eric J. Billman, Eric J. Wagner, Ronney E. Arndt, Erin Vandyke
Western North American Naturalist
We examined optimal temperatures for growth and the upper thermal tolerance of juvenile northern leatherside chub (Lepidomeda copei). We conducted 2 experiments using the acclimated chronic-exposure method to estimate optimal temperature for growth of age-0 northern leatherside chub (range 12.8–28.3 °C). Upper thermal tolerance was estimated using the critical thermal maximum (CTM) and upper incipient lethal temperature (UILT) methods for fish acclimated at 15, 18, 23, and 28 °C. We also measured stream temperatures in Yellow Creek, Summit County, Utah, during July–August 2006 to compare our results to actual summer stream temperatures. Survival in growth tests was not …
Volume 46, Number 19: December 31, 2008, University Of North Dakota
Volume 46, Number 19: December 31, 2008, University Of North Dakota
University Letter Archive
No abstract provided.
Thermal Modeling Of On-Chip Interconnects And 3d Packaging Using Em Tools, Lijun Jiang, Seshadri Kolluri, Barry J. Rubin, Howard Smith, Evan G. Colgan, Michael R. Scheuermann, Jamil A. Wakit, Alina Deutsch, Jason Gill
Thermal Modeling Of On-Chip Interconnects And 3d Packaging Using Em Tools, Lijun Jiang, Seshadri Kolluri, Barry J. Rubin, Howard Smith, Evan G. Colgan, Michael R. Scheuermann, Jamil A. Wakit, Alina Deutsch, Jason Gill
Electrical and Computer Engineering Faculty Research & Creative Works
The green (low power) chip design demands dramatic thermal and electrical simulation capabilities. In this paper, a novel thermal simulation approach for automatic thermal modeling of very large problems is introduced. This methodology can be fully integrated with existing solvers for electrical simulations, and make it possible to analyze practical on-chip and packaging thermal problems using the existing electromagnetic tools and geometry definitions, with very small additional effort. Its various applications to BEOL (on-chip wiring), thermal guideline design, and 3D integration (for multiple chip stacks) thermal modeling are investigated in this paper. We will demonstrate this capability with an automatic …
Methods And Apparatus For Preventing A Third Party From Overhearing A Telephone Conversation, Thaddeus Gabara, Vladimir I. Prodanov
Methods And Apparatus For Preventing A Third Party From Overhearing A Telephone Conversation, Thaddeus Gabara, Vladimir I. Prodanov
Electrical Engineering
Methods and apparatus are provided for preventing a third party from listening to a conversation between at least two participants on a telephone. The telephone generates an audio stimulus signal that is presented through a secondary speaker. The audio stimulus signal may be, for example, pseudorandom noise or a cancellation signal. According to one aspect of the invention, the telephone ensures that the audio stimulus signal does not significantly impair the conversation for the at least two participants. To prevent the third party from listening to the local portion of the conversation, the audio stimulus signal is subtracted from the …
Frequency Tunable Resonant Apparatus, Aristide Dogariu, Pieter Kik
Frequency Tunable Resonant Apparatus, Aristide Dogariu, Pieter Kik
UCF Patents
Tuning of the resonant state of a structure that scatters optical fields is achieved by varying the effective optical properties of the environment of a small conductive structure. The frequency tunable resonant scatterer includes a medium, a conductive structure within that medium and a second structure in the vicinity of said conductive structure, wherein the plasmon resonance of said conductive structure is tuned by way of the proximity of said second structure to said conductive structure. The second structure is gradually moved away from and closer to the nanoparticle to change the effective dielectric constant for tuning a resonance frequency …
Isolated Dc-Dc Converters With High Current Capability, Issa Batarseh, Liangbin Yao
Isolated Dc-Dc Converters With High Current Capability, Issa Batarseh, Liangbin Yao
UCF Patents
A DC-to-DC converter having a transformer with a primary and a tapped secondary, two serial output filter inductors connected parallel with the secondary, a center output filter inductor connected between the secondary tap and serial output inductors, two serially connected switches connected in parallel with the two output inductors for receiving a signal to control operation of the switches during steady state and an output load connected between the serial connection of the serial output inductors and serial switching devices. The transformer primary side connected with double-ended primary-side topologies. The transformer secondary and output filers configured to form a current …
Topological Structures In The Equities Market Network, Gregory Leibon, Scott Pauls, Daniel Rockmore, Robert Savell
Topological Structures In The Equities Market Network, Gregory Leibon, Scott Pauls, Daniel Rockmore, Robert Savell
Dartmouth Scholarship
We present a new method for articulating scale-dependent topological descriptions of the network structure inherent in many complex systems. The technique is based on “partition decoupled null models,” a new class of null models that incorporate the interaction of clustered partitions into a random model and generalize the Gaussian ensemble. As an application, we analyze a correlation matrix derived from 4 years of close prices of equities in the New York Stock Exchange (NYSE) and National Association of Securities Dealers Automated Quotation (NASDAQ). In this example, we expose (i) a natural structure composed of 2 interacting partitions of …
Grey Measurement Based On Rough Set Granule Calculations, Jian Liu, Zhili Huang, Shunxiang Wu, Ruiyi Chen
Grey Measurement Based On Rough Set Granule Calculations, Jian Liu, Zhili Huang, Shunxiang Wu, Ruiyi Chen
Electrical and Computer Engineering Faculty Research & Creative Works
This paper put the Rough set methodology based on the information table disposal to expand the dual (binary) relations described by the neighborhood system. To make full use of logic operations including AND operation by-bit, XOR operation by-bit and NOR operation by-bit, gains the certain and uncertain information among the various decision-making factors. The use of knowledge related with Grey system theory, establishes their mathematical model for decision making and data mining, according to the principle of the priority of certain information in decision-making and the ambiguity degree from small to big. At last, a new method for data mining …
Secondary Electron Imaging Of Embedded Defects In Carbon Nanofiber Via Interconnects, Makoto Suzuki, Yusuke Ominami, Takashi Sekiguchi, Cary Y. Yang
Secondary Electron Imaging Of Embedded Defects In Carbon Nanofiber Via Interconnects, Makoto Suzuki, Yusuke Ominami, Takashi Sekiguchi, Cary Y. Yang
Electrical and Computer Engineering
Carbon nanofiber (CNF) via interconnect test structures are fabricated with the bottom-up process proposed by Li et al. [Appl. Phys. Lett. 82, 2491 (2003)] for next-generation integrated circuit technology. Critical defects in the interconnect structure are examined using scanning electron microscopy. It is shown that secondary electron signal with optimized incident beam energy is useful for detecting embedded defects, including unexposed CNF plugs and voids in the dielectric layer. The defect imaging mechanisms are elucidated based on beam-induced charging of the specimen surface.
Energy Conservation In The Trinidad Tourist Industry Training Program, Florida Solar Energy Center, William Young
Energy Conservation In The Trinidad Tourist Industry Training Program, Florida Solar Energy Center, William Young
FSEC Energy Research Center®
This Final Report summarizes the work performed by the Florida Solar Energy Center/University of Central Florida on the contract entitled "Energy Conservation in the Trinidad Tourist Industry Training Program". This program was performed for the Ministry of Tourism, Trinidad and Tobago, WI. (MoTTT) for the period September 1 to November 1, 2008. The MoTTT established a program for the tourist industry to facilitate learning about energy conservation and renewable energy technologies appropriate for resort applications on the Island of Trinidad. The Florida Solar Energy Center provided assistance through consulting, in education about energy technologies. FSEC modified existing energy training courses …
Graph Distances In The Data-Stream Model, Joan Feigenbaum, Sampath Kannan, Andrew Mcgregor, Siddharth Suri, Jian Zhang
Graph Distances In The Data-Stream Model, Joan Feigenbaum, Sampath Kannan, Andrew Mcgregor, Siddharth Suri, Jian Zhang
Faculty Publications
We explore problems related to computing graph distances in the data-stream model. The goal is to design algorithms that can process the edges of a graph in an arbitrary order given only a limited amount of working memory. We are motivated by both the practical challenge of processing massive graphs such as the web graph and the desire for a better theoretical understanding of the data-stream model. In particular, we are interested in the trade-offs between model parameters such as per-data-item processing time, total space, and the number of passes that may be taken over the stream. These trade-offs are …
Expressiveness And Effectiveness Of Program Comprehension: Thoughts On Future Research Directions, Jonathan I. Maletic, Huzefa Kagdi
Expressiveness And Effectiveness Of Program Comprehension: Thoughts On Future Research Directions, Jonathan I. Maletic, Huzefa Kagdi
Computer Science Faculty Research & Creative Works
A number of research challenges in the area of program comprehension are presented. the expressiveness and effectiveness of program comprehension are discussed, and research directions are organized along these two axes. Both fundament research issues are raised along with new applications for program comprehension methods. the work advocates the investigation of better measures, further empirical studies, and controlled experiments to assess the effectiveness of program comprehension techniques © 2008 IEEE.