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Institution

Applied Science Private University

EducationAmman, Jordan
About: Applied Science Private University is a education organization based out in Amman, Jordan. It is known for research contribution in the topics: Population & Catalysis. The organization has 4124 authors who have published 5299 publications receiving 116167 citations.


Papers
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Journal ArticleDOI
TL;DR: Tooth preparation with an adequate water flow does not cause harmful temperature changes in the pulp chamber, regardless of rotary cutting instrument type.
Abstract: Statement of problem Standards to test the cutting efficiency of dental rotary cutting instruments are either nonexistent or inappropriate, and knowledge of the factors that affect their cutting performance is limited. Therefore, rotary cutting instruments for crown preparation are generally marketed with weak or unsupported claims of superior performance. Purpose The purpose of this study was to examine the cutting behavior of a wide selection of rotary cutting instruments under carefully controlled and reproducible conditions with an air-turbine handpiece. Material and methods Ten groups of rotary cutting instruments (n=30) designed for tooth preparation were selected: 9 diamond rotary cutting instruments (7 multi-use, 2 disposable) and 1 carbide bur. One bur per group was imaged with a scanning electron microscope (SEM) at different magnifications. Macor blocks (n=75) were used as a substrate, and 4 cuts were made on each specimen, using a new rotary cutting instrument each time, for a total of 300 cuts. The cuts were performed with an air-turbine handpiece (Midwest Quiet Air). A computer-controlled, custom-made testing apparatus was used to monitor all sensors and control the cutting action. The data were analyzed to compare the correlation of rotary cutting instrument type, grit, amount of pressure, cutting rate, revolutions per minute (rpm), temperature, and type of handpiece, using 1-way ANOVA and Tukey's Studentized Range test (α=.05). Results Compared to the baseline temperature, all rotary cutting instruments showed a reduction of temperature in the simulated pulp chamber. The Great White Ultra (carbide bur) showed a significantly higher rate of advancement (0.15 mm/s) and lower applied load (106.46 g) and rpm (304,375.97). Conclusions Tooth preparation with an adequate water flow does not cause harmful temperature changes in the pulp chamber, regardless of rotary cutting instrument type. The tested carbide bur showed greater cutting efficiency than all diamond rotary cutting instruments. (J Prosthet Dent 2009;101:248-261)

52 citations

Journal ArticleDOI
TL;DR: A methodology that incorporates optimization techniques and statistical experimental designs within a general framework to address the issues of uncertainty and risk as well as their correlations in a systematic manner is proposed.
Abstract: In recent years, the issue of water allocation among competing users has been of great concern for many countries due to increasing water demand from population growth and economic development In water management systems, the inherent uncertainties and their potential interactions pose a significant challenge for water managers to identify optimal water-allocation schemes in a complex and uncertain environment This paper thus proposes a methodology that incorporates optimization techniques and statistical experimental designs within a general framework to address the issues of uncertainty and risk as well as their correlations in a systematic manner A water resources management problem is used to demonstrate the applicability of the proposed methodology The results indicate that interval solutions can be generated for the objective function and decision variables, and a number of decision alternatives can be obtained under different policy scenarios The solutions with different risk levels of constraint violation can help quantify the relationship between the economic objective and the system risk, which is meaningful for supporting risk management The experimental data obtained from the Taguchi's orthogonal array design are useful for identifying the significant factors affecting the means of total net benefits Then the findings from the mixed-level factorial experiment can help reveal the latent interactions between those significant factors at different levels and their effects on the modeling response

52 citations

Journal ArticleDOI
TL;DR: In this paper, an analytic interatomic bond-order potential BOP that depends explicitly on the group number of the sp-valent element is derived by extrapolating from half-full occupancy using a simple envelope function for the upper bound of the bond order.
Abstract: An analytic interatomic bond-order potential BOP is derived that depends explicitly on the group number of the sp-valent element. This is achieved by generalizing the previously published BOP for group-IV elements by extrapolating from half-full occupancy using a simple envelope function for the upper bound of the bond order. This interatomic potential predicts the structural trends across the sp-valent elements that are found by our tight-binding reference calculations and observed by experiment. Unlike empirical interatomic potentials this theoretically derived BOP includes the valence-dependent character of the bonding naturally within its remit.

52 citations

Journal ArticleDOI
TL;DR: In this paper, a two-axis sun tracking system was used to achieve a temperature of 93°C in a day where the maximum ambient temperature was 32°C. This temperature is suitable for cooking purposes and this was achieved by using the two-axes tracking system.

52 citations

Journal ArticleDOI
TL;DR: In this article, the phase behavior of CO 2 -brine and CO 2-oil systems under various operating conditions was investigated and a series of oil swelling/extraction tests were conducted at aforementioned experimental conditions using a see-through high-pressure cell to determine the oil swelling factor at various equilibrium conditions.

52 citations


Authors

Showing all 4150 results

NameH-indexPapersCitations
Hua Zhang1631503116769
Menachem Elimelech15754795285
Yu Huang136149289209
Dmitri Golberg129102461788
Andrea Carlo Marini123123672959
Dionysios D. Dionysiou11667548449
Liyuan Han11476665277
Shunichi Fukuzumi111125652764
John A. Stankovic10955951329
Judea Pearl10751283978
Feng Wang107113664644
O. C. Zienkiewicz10745571204
Jeffrey I. Zink9950942667
Kazuhiro Hono9887833534
Robert W. Boyd98116137321
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20239
202255
2021599
2020473
2019404
2018355