Finite Element Analysis and Test of an Ultrasonic Compound Horn

Authors: Hongbing Wang, Chunhua Sun

ABSTRACT
An ultrasonic compound horn is designed and manufactured, and the horn is analyzed by wave equation, finite element method and test. The modal frequencies and frequencies of the first and second longitudinal vibration of the horn are obtained by the finite element analysis. The horn is made and modal testing is carried out. The modal frequencies of the first and second longitudinal vibration are obtained respectively. The test results are in good agreement with the theoretical calculation. Experimental results show the maximum amplitude of the horn can reach 9 nm with applied excitation voltage of amplitude 7 V and frequency 21,450 Hz, when the amplitude of voltage increases to 80 V, the horn of maximum amplitude reaches 23 μm. The maximum amplitude of the horn is approximately proportional to the amplitude of excitation voltage. The horn has the characteristics of high sensitivity and large amplitude, and can be used in ultrasonic machining and other fields.

Source:

Journal: World Journal of Engineering and Technology
DOI: 10.4236/wjet.2017.53029 (PDF)
Paper Id: 77558 (metadata)

See also: Comments to Paper

Posted in WJET | Leave a comment

Study and Analysis of Meteorological Effect on Shanghai Sheshan National Tourist Resorts in Shanghai

Authors: Yuliang Rong, Xia Zhang, Qianshan He

ABSTRACT
In this paper, the main meteorological disasters in the Sheshan National Tourist and Vacation Areas are analyzed by using the climate data from 1955 to 2014, such as average temperature, relative humidity, wind speed, insolation duration. The influences of meteorological parameters on this area are studied with the climate comfort evaluation and meteorological disaster climate trend. It is found that the major meteorological disasters in this area including fog, typhoon, storm, wind, thunderstorms and high temperature, were occurred in different periods with higher frequency from May to October. Nineteen comfortable ten-day periods in a year are suitable for tourist activities, during March and May, late September and the end of December. And seventeen ten-day periods in a year are not suitable for tourist activities, from January to February and from June to the middle of September. Some suggestions for tourism weather service on the basis of these results are listed in the conclusion.

Source:

Journal: Journal of Geoscience and Environment Protection
DOI: 10.4236/gep.2017.57002 (PDF)
Paper Id: 77531 (metadata)

See also: Comments to Paper

Posted in GEP | Leave a comment

Erectile Dysfunction in Male with Glans Penis Apocrine Hydrocystoma: Organic or Psychogenic?

Authors: Ion Dumbravean, Iurie Arian, Andrei Munteanu, Daniela Catereniuc,
Adrian Tanase

ABSTRACT
The location of the apocrine hydrocystoma in the penis region is rare. We present a case where we evaluated the erectile function of a patient presenting such an asymptomatic formation. We assessed the psychogenic component of the erectile dysfunction based on the association of the somatic component of the cyst with the patient’s inability to focus on sexual intercourse. The fear of traumatization of the cyst during sexual intercourse was considered as a triggering factor of the chain of insufficient or unsuccessful erections, and the sexual performance anxiety as a factor in maintaining this erectile dysfunction. Apparently, an organic cause induced an erectile dysfunction, through non-organic (predisposition, triggering and maintenance) mechanisms.

Source:

Journal: Advances in Sexual Medicine
DOI: 10.4236/asm.2017.73010 (PDF)
Paper Id: 77493 (metadata)

See also: Comments to Paper

Posted in ASM | Leave a comment

Health as Balance: A Conceptual Study

Author: Abraham Rudnick

ABSTRACT
The notion of health as balance has influenced health care for long. It is not known in what ways, if any, this notion has influenced health research, and whether such influence is helpful. I conduct here a conceptual (rather than an empirical) study to address the unsolved problem whether the notion of health as balance (rather than balance restoring health), specified in various established ways, such as balance between internal and external forces, may be helpful when used in health research. I find that the notion of health as balance has challenges, such as when it focuses on homeostasis, as norms of health are not specified by such a notion. Yet the notion of self-organization has promise as a helpful specification of the notion of health as balance. Health research may benefit from the innovation of use of the notion of health as self-organization, such as by prioritizing host and person (rather than agent) in physical and mental health research and using complexity theory and related methods in relation to self-organization.

Source:

Journal: Health
DOI: 10.4236/health.2017.97072 (PDF)
Paper Id: 77471 (metadata)

See also: Comments to Paper

Posted in Health | Leave a comment

Using the Analytical Hierarchy Process Model in the Prioritization of Information Assurance Defense In-Depth Measures?—A Quantitative Study

Author: Rodney Alexander

ABSTRACT
Organizational computing devices are increasingly becoming targets of cyber-attacks, and organizations have become dependent on the safety and security of their computer networks and their organizational computing devices. Business and government often use defense in-depth information assurance measures such as firewalls, intrusion detection systems, and password procedures across their enterprises to plan strategically and manage IT security risks. This quantitative study explores whether the analytical hierarchy process (AHP) model can be effectively applied to the prioritization of information assurance defense in-depth measures. In response to these threats, the President, legislators, experts, and others have characterized cyber security as a pressing national security issue. The methods used in this study consisted of emailing study participants a survey requesting that they prioritize five defense in-depth information assurance measures, anti-virus, intrusion detection, password, smart-cards, and encryption, with a range of responses from 1 – 5 using a Likert scale to consider standard cost, effectiveness, and perceived ease of use in terms of protection of organizational computing devices. The measures were then weighted, based on ranking. A pair-wise comparison of each of the five measures is then made using AHP to determine whether the Likert scale and the AHP model could be effectively applied to the prioritization of information assurance measures to protect organizational computing devices. The findings of the research reject the H0 null hypothesis that AHP does not affect the relationship between the information technology analysts’ prioritization of five defense in-depth dependent variables and the independent variables of cost, ease of use, and effectiveness in protecting organizational devices against cyber-attacks.

Source:

Journal: Journal of Information Security
DOI: 10.4236/jis.2017.83011 (PDF)
Paper Id: 77446 (metadata)

See also: Comments to Paper

Posted in JIS | Leave a comment

From Malaise to Welfare in Teaching: Elements for Teachers Education

Authors: Aline Rocha Mendes, Karina Pacheco Dohms, Saul Neves de Jesus,
Bettina Steren dos Santos, Claus Dieter Stobäus, Juan José Mouriño Mosquera

ABSTRACT
The article gives elements and also goes forward on understanding the presence of teachers’ malaise and/or welfare in the education field, influencing teachers as professional and as person, and apporting research results and reflections based on literature. It also pointed some directions to relations with Psychology, Special/Inclusive Education, and use of the Information and Communication Technologies, linked to Positive Psychology and Health Psychology.

Source:

Journal: Creative Education
DOI: 10.4236/ce.2017.88085 (PDF)
Paper Id: 77411 (metadata)

See also: Comments to Paper

Posted in CE | 1 Comment

Integrity or Compliance Based Ethics: Which Is Better for Today’s Business?

Author: Bruce H. Geddes

ABSTRACT
A firm and a rigorous ethics program are essential in business today. Consumers demand that the companies that they do business with be ethical. Compliance and integrity based ethics programs are the leading pragmatic approaches to ethics used in today’s business environment. Reviewing each of these programs individually and then comparing and contrasting them and finally evaluating them as a synthesized program is a useful form of analysis. By separating, then comparing and subsequently integrating the best of both methods leads to the determination that firms must be able to synthesize the two theories and apply them to their business.

Source:

Journal: Open Journal of Business and Management
DOI: 10.4236/ojbm.2017.53036 (PDF)
Paper Id: 77411 (metadata)

See also: Comments to Paper

Posted in OJBM | 1 Comment

DC Electrical Conductivity Studies of GeO2 Doped Lead Vanadate Glass System

Authors: P. Tejeswararao, D. L. Sastry

ABSTRACT
Temperature dependent DC electrical conductivity studies of GeO2 substituted lead vanadate glass systems xGeO2(50-x)PbO:50V2O5 (x = 5, 10, 15 mole%) were carried out and the results are reported. X-ray diffraction results reveal that all samples are perfect amorphous in nature. DSC results indicate that the substituent GeO2 is replacing PbO in the glass network in such a way that the eutectic composition is maintained. DC electrical conductivity studies of the glass samples indicate that the systems are characterized by different activation energies in different temperature ranges which in turn depend on the annealing temperature. These results are interpreted in terms of temperature dependent microstructural changes in these glass systems.

Source:

Journal: New Journal of Glass and Ceramics
DOI: 10.4236/njgc.2017.73005 (PDF)
Paper Id: 77368 (metadata)

See also: Comments to Paper

Posted in NJGC | Leave a comment

Biological Concept of Bacterial Pathogenicity (Theoretical Review)

Author: Yurii V. Ezepchuk

ABSTRACT
Biological nature of the bacterial pathogenicity phenomenon is based on the interaction of prokaryotic and eukaryotic organisms. The phenomenon is the poly-functional biological potency of germs that are realized by factors (determinants) of pathogenicity. Some fundamental biological functions are responsible for bacterial pathogenicity in a multi-cellular host organism: the adhesive function, the function of invasion and penetration into the cell, the function of evasion of host defense, and the damage function. The action of adhesion, invasion and evasionis directed to towards establishing an ecological niche in multi-cellular host while the aim of the damaging function is destruction of the environment.

Source:

Journal: Advances in Microbiology
DOI: 10.4236/aim.2017.77042 (PDF)
Paper Id: 77338 (metadata)

See also: Comments to Paper

Posted in AiM | Leave a comment

Study of Microbiological Quality along the Water Chain in Belbedji in the Republic of Niger

Authors: Salifou Issa, Daouda Mama, Adamou Zanguina, Ibrahim Natatou,
Mousa Boukari, Dominique Sohounhloué

ABSTRACT
This work deals with the microbiological study along the water chain in Belbedji, a local government in the northwest of the Zinder region in the Republic of Niger. For this study, two (2) standpipes, thirty (30) families and ninety (90) samples were selected in order to follow the variation of water microbiological quality. For that the parameters studied are the total coliforms, the fecal coliforms and the E. coli. From these parameters we calculated the indication or the index of the microbiological quality (MQI) by the method of Bovesse and Depelchin, 1980. The variations of the fecal contamination at the level of the families in the different phases are represented on maps. At the water marker, 100% of families have good microbiological quality. After the transport of water, on 3.33% of the families the quality of the water deteriorated. After water storage, 16.66% of families had deteriorated water quality, with the passage of fecal contamination from zero to low on 13.33% of families, and fecal contamination from zero to moderate 3.33% of families.

Source:

Journal: Journal of Environmental Protection
DOI: 10.4236/jep.2017.87049 (PDF)
Paper Id: 77289 (metadata)

See also: Comments to Paper

Posted in JEP | Leave a comment