Safety Danger Research Articles

Application Research on Energy Saving Technology of Waste Heat Recovery and Defrosting for Low Temperature Cold Storage

In this paper, a glycol defrosting system using waste heat exhaust from refrigeration compressor is designed. The defrosting numerical model, heat transfer model and frost growth model were established. The frost thickness, defrosting heat consumption and ethylene glycol flow rate were calculated, and the ethylene glycol pipeline was designed. The project solves the problems of traditional defrosting of cold storage, such as high power consumption, fluctuation of storage temperature, hidden danger of safety, high condensation temperature and low efficiency of refrigeration system.

Bridge Safety Dangers - Fatigue Cracks, Brittle Failures and Grit Blasting

Fatigue failures in bridges have been extensively studied for decades, and experimental data was applied to create fatigue curves to be used for bridge designs, however, new research questions the validity of these curves with respect to safe bridge design. Specifically, grit blasting for coating adherence creates surface damage in the form of sharp indentations and peaks over entire steel surfaces. These imperfections act as stress raisers that accelerate bridge failures by reducing the number of cycles to failure and the stresses required to cause failure. Strong differences of opinion exist with respect to this complex issue. This author believes that there is a significant threat to bridge safety, while other authors believe that there is no safety threat at all. The goal of this article is to effectively refute opinions which claim that bridge safety is adequate. To do so, a thorough review of earlier publications is combined with new developments on grit blasting fatigue. Bridge safety is questionable since bridge design requirements in the form of fatigue curves are questionable. There is limited information, one way or the other, to prove the full extent of grit blasting effects on steel bridge fatigue failures, and this paper fosters an understanding of this dangerous threat. Available results clearly prove that bridge fatigue properties are reduced by grit blasting, which in turn reduces the safety of design practices for bridges. An open and unknown question exists, what is the complete extent of grit blasting effects on large structures? That is, bridge failure mechanisms are not fully understood, there are uncertain risks with respect to bridge fatigue damages, and a paramount risk concerns grit blasting. Grit blasting safety effects cannot be dismissed. Moreover, evolving facts prove that the inherent dangers in bridge design practices must be addressed and resolved. Specifically, bridge design curves account for repeated loads on bridges caused by traffic, and further research is mandatory to determine the safety errors inherent in these curves, which are shown to be inadequate by this innovative research. A resistance to new ideas serves as an unacceptable reason to curtail technology that will improve bridge safety.

Earthquake response of the train–slab ballastless track–subgrade system: A shaking table test study

Earthquake is one of the major factors that provoke train derailment. To investigate dynamic responses of the train–slab ballastless track–subgrade system and derailment features of the train subjected to earthquake, a first large-scale shaking table test on this system was carried out in China. The loaded seismic wave is an earthquake wave of Zhengzhou Yellow River Bridge Site provided by the China Earthquake Administration. It was observed that the elevation of subgrade and embankment could magnify acceleration responses, and the transverse amplification effect of the elevation in soil was more pronounced than the vertical amplification effect. The acceleration response of a track slab was weaker than that of the top subgrade because of integrality and rigidity of the track slab. The bogie shows a shock-absorbing effect in the transverse direction. When the input amplitude was not larger than 0.14 g, the transverse and the vertical acceleration of the rail increased with rising earthquake amplitudes and fluctuated later. Meanwhile, the current stopping threshold for trains is conservative because the derailment factor was less than 0.8 and the peak lateral displacement of wheels was much smaller than the cross-sectional size of the rail model under a 0.12 g earthquake excitation. The current stopping threshold in codes could be reasonable in view of limited quantity and limited types of loaded earthquake in the test. The critical derailment condition of trains was 0.23 g when the Zhengzhou Yellow River Bridge Site earthquake was loaded, and the displacement analysis showed that it would be a great danger for train safety.

Social Networking Security

Information protection is very essential these days to anyone using a pc or to any company that employs computers and networking in their day to day operations. That is almost everyone. Information protection need to be at the forefront of everyone’s thinking in view that so a lot of our personal information is out there on the Internet. On this paper, the thinking of protection and privateness in social media, or social networking can be mentioned. First, a short history and the notion of social networking will be introduced. Many of the safety dangers related with the use of social media are presented. Also, the trouble of privateness and how it relates to security are described.

Optimization of decay time in radioactivity detection of building ceramics and analysis of radioactivity level of ceramics in Nan’ an city

The basic principle of radioactivity and the technical method for measuring the radioactivity of ceramic tiles with low background multi-channel high-purity germanium gamma spectrometer are introduced. The reasonable optimization of the balance time of tile radioactivity detection has certain reference value for improving the level of radioactivity detection technology. Combined with the data analysis of the special quality supervision and random inspection of ceramic tiles in the past five years, the radioactivity indicators of ceramic tile products in the jurisdiction are all at a qualified level, effectively eliminating the hidden dangers of radioactive safety of ceramic tile products and ensuring the health and safety of the citizens.

FUNCTIONAL BASIS OF ACTIVITIES OF SUBJECTS SOCIAL SECURITY

The purpose of the article is to determine the system of functioning of social security entities on the basis of doctrinal approaches. The article analyzes the theoretical approaches to understanding the functions of subjects in the field of public safety. Generalizations are made, the corresponding classification of key functions is carried out. It is established that the functions of subjects in the field of social security should be divided into: 1) main or basic functions - ie material, which determine the object of public safety, ie social relations in a particular area of human activity and determine ways to influence them; 2) secondary or derivatives, which include those that are determined by the very legal status of a subject in the field of public safety. It is concluded that the law-making function means the issuance of regulations of various legal nature to establish formal rules and procedures for ensuring public safety in a particular sector of the economy. These acts are binding acts, the content of which is to comply with safety rules in these areas and differs on the basis of the peculiarities of application and the actual signs of influence on the state of public relations. The law-making function is expressed in ensuring public safety, through the issuance of acts, based on monitoring and coordination in this area. The operational and executive function is to ensure public safety by means of exercising powers in the field of sectoral public security. This function is formed due to two activities to ensure public safety. The operational component is defined as responding to various types of threats and dangers of public safety. Executive, in turn, means strict compliance with the law on public safety, which is the responsibility of the relevant public safety entity.

Research on the Technology of Conductor Corrosion Detection based on Eddy Current Testing

The detection of conductor corrosion state provides technical guarantee for mastering the corrosion type, corrosion degree and service life of power transmission lines, realizing the timeliness and accuracy of power line replacement, and reducing the hidden danger of line safety. In this paper, a method based on eddy current testing for corrosion detection of power wire is proposed. High and low frequency eddy current testing is used to measure the residual cross-sectional area of wire, and the output database of flaw detection is established to deduce the residual tensile force of wire. Finally, by introducing the artificial single line sample and the actual running conductor for dynamic comparison, the residual tension data of the conductor can be corrected. The results show that the method adopted in this paper is feasible and accurate, which further guarantees the safe and reliable operation of overhead transmission lines.

Measurement and Analysis of abnormal noise of 10kV switch Cabinet

When the load current flows through the main row of the switch cabinet, the induction current is generated on both sides of the cabinet, and the electric power of the interaction between the bus and the panel appears. Because of the thin switch cabinet panel and double-layer plate structure, when the load current is large, the double-layer panel vibrates violently and collides with each other under the action of electric power, and then resulting in abnormal noise. It may lead to hidden danger of equipment safety for long time. In this paper, acoustic imaging technology is used to accurately locate the sound source, and then the vibration acceleration amplitude is measured by the vibration sensors. Based on its spectrum characteristics analyse result, the causes of abnormal noise are discussed and solutions are put forward.

PERCEPTION OF THE ENTITY'S SECURITY

The article analyzes the definition of security as the state of affairs in which the subject is located. Attention was focused on objective and subjective perception of security. On the basis of the quoted views, an attempt was made to create a conceptual apparatus enabling the assessment of safety states and danger in correlation with the right and wrong perception of the subject of perceiving opportunities and threats to its environment

Hemşirelikte bakım kalitesi ve hasta güvenliği için bir tehlike: İşte var olamama

Hemşirelikte bakım kalitesi ve hasta güvenliği için bir tehlike: İşte var olamama

Rapid strand replacement primer thermostat visual sensor based on Bst DNA polymerase and pyrophosphatase for detecting Vibrio parahaemolyticus

Vibrio parahaemolyticus is a major hidden danger of food safety. To develop a rapid, sensitive and on-site detecting method of Vibrio parahaemolyticus (V. parahaemolyticus), a strand replacement primer thermostat phosphate (SRPP) visual sensor was proposed, based on Bst DNA polymerase and pyrophosphatase. The novel strand replacement primer (SRP) facilitates chain substitution and to open a self-folding hairpin by adding region at its 3′ end. Under the action of the SRP, a pair of external primers and two inner primers, target DNA is specifically amplified at 63 °C relies mainly on the hairpin. Many pyrophosphates (PPi) are simultaneously generated as by-products, which can be converted into phosphates (Pi) by pyrophosphatase for phosphomolybdate blue visual detection within 5 min. The proposed biosensor can detect 1.29 × 103 copies of V. parahaemolyticus within 35 min.

Effect of Workplace Safety and Health Practices on Employee Commitment and Performance in Steel Manufacturing Companies in Rwanda


 
 
 The purpose of this study was to establish the effects of workplace safety and health practices on the employees’ commitment and performance in Steel manufacturing companies in Rwanda. The target population of this study was 533 people, which comprised of Managers, Supervisors and employees. A simple random sampling technique was used to select a sample size of 229 respondents from the target population. The data was collected using questionnaires, interview guide and personal observation. The Statistical Package for Social Science (SPSS) software, version 21.0, was used to process data while descriptive statistics such as the means, modes, standard deviation, variances and inferential statistics were used to analyze the data. The findings of the study indicate that most workers are aware of the dangers of occupational health and safety in the workplace. Also the study found that although employees are aware of the occupational health and safety concerns they neglect to put on the Personal Protective Equipments saying that it is too hot. The study concludes that occupational health and safety significantly affects employee commitment and performance. This study recommends that management should insure the workers and provide them with personal protective equipments to minimize workplace injuries and accident. The study also recommends that management provide regular education and training on occupational health and safety concerns to prevent workplace injuries, hence, promote productivity.
 
 

Network Intrusion Detection Techniques and Network Attack Types

With the huge improvement in innovation and with the big utilization of internet, massive increment in internet dangers has been seeing which activates contriving of latest strategies in device protection. those types of gadget attacks as some distance as unapproved get to, unordinary assaults can be remedy making use of network Intrusion Detection device(NIDS). machine Anomaly Detection(NAD) framework is a particular assortment of IDS. it's miles a corresponding innovation to frameworks that distinguish safety dangers depending on parcel marks. In NAD, the device is unendingly decided for event of anomalous activities or unexpected assaults. by way of utilising this NAD techniques, it is plausible to select out in the occasion that all and sundry tries to attack property or particular has with the aid of using and contrasting and the records accrued from past regarded assaults. This paper gives diagram on severa classifications NID techniques and moreover numerous styles of structures assaults. We bear in mind that this audit will provide a advanced keen of the special commands of attack sorts records, which gives degree to analyze to retain similarly.

Assessment of a concrete cable-stayed bridge after replacement of the closure segment

The concept of replacement of the closure segment (RCS) emerged originally in a strengthening project for a concrete cable-stayed bridge and was intended to deal with a failure in the closure segment of the main girder. The construction procedure of RCS includes removing the failed closure segment, reconstructing the closure segment and finally improving the connection between the new closure segment and the original residual part of the main girder. Thus, a relatively complex conversion in structural state is involved. To assess the completed bridge after RCS, a finite-element model of a typical bridge is developed by using the software Dr. Bridge, and then a construction stage analysis is performed in the present study. Numerical results show that RCS eradicated the hidden structural safety danger while the structural integrity was improved to a certain extent. However, RCS had no significant influence on the geometric profile of the bridge deck, on the horizontal displacement at the top of each pylon and on tensions in the cable stays. As the stress condition in the new closure segment and associated joints between segments could not be improved by mere RCS, other strengthening measures should be taken to achieve a further structural state adjustment for the completed bridge. As a novel strengthening idea, RCS has a comparable advantage and remarkable economic benefit in dealing with local failure in the structure. Inevitably, it has some limitations in practical use.

Prevention of Data Theft Attacks in Infrastructure as a service Cloud through Trusted Computing

Dispensed computing is a developmental model that permits cloud consumer to name for assets with on-request management and use the assets utilizing pay in step with use version. Due to this pliability, the dispensed computing implementing colossal safety dangers. Consistent with the pc security Alliance, an insider chance is a noteworthy chance in distributed computing situation. This threat quite influences the data trustworthiness and classification of cloud client applications, administrations, or statistics. In this paper, we generally have a tendency to specializing in corporation reliable attacks on consumer virtual machines and anticipated a structure that upholds facts respectability and privateness, littlest TPM activities, and decreased and irrefutable reliable figuring base. Our exploratory consequences show the us of the united states that custom remember-visor hyper-visor playacting brilliant and it will prevent and word the business enterprise legitimate assaults in cloud surroundings

Study on the Assessment Method of the Impact on Hydrological Safety of Riverside Pit-Ponds along a Dike

Riverside pit-ponds are one of the hidden dangers of flood control project safety. At present, the safety evaluation of riverside pit-ponds is limited to the seepage and stable safety review of the dam, and the impact of the pit on the river flow is not considered. In this paper, a two-dimensional mathematical model of flow is established. Pressure correction method is used to solve the pressure-velocity coupling. Topographic cutting method is used to deal with the dynamic boundary problem. The model grid of the pit-ponds area is encrypted. The accuracy of the model in the analysis of river hydrodynamics is verified by an example. The model is applied to the evaluation of the impact of the pit-ponds on river flooding. Taking some riverside pit-ponds of the Yellow River as an example, the river water level, velocity, and flow in the present condition and the backfill condition are simulated by the model. The results show that the existence of these riverside pit-ponds only affects the hydrological features of regions around the pit-ponds, and the impact is too insignificant to threaten the hydrological safety. Through the hydrological safety assessment of the project, it is shown that the combination of the two-dimensional flow mathematical model with seepage, anti-sliding, and seismic safety review can comprehensively assess the hydrological safety of dike engineering.

The Dangers of Health and Safety: Marijuana Legalization as Frontier Capitalism

In this article I explore how the legalization of marijuana in North America involves the racialized class appropriation of diverse material, social and cultural capitals borne of black-market marijuana production and distribution. This process is facilitated by a conceptual dichotomy that grants the public either a U.S.-driven “war on drugs” or a state-organized corporate marijuana sector that favors highly capitalized interests, omitting the option of simple decriminalization. I study how this false dichotomy is normalized by politicians, entrepreneurs, and lay consumers by way of two interrelated strategies: The traditional vendor is constructed as “violent” whereas the legal one is “safe,” and the legalized marijuana product of “safe” corporate oligarchs is also made “safe” by its discursive and institutional association with medicine, purity, and “healing,” whereas the product of traditional suppliers remains “polluted” and “dangerous.” In the final analysis, we remember that health itself is a political, class-making device, brought to inaugurate class rights, responsibilities, and the respectability of some at the expense of others. Synthesizing ethnographic analysis, historical inquiry, political economic theories of capitalist appropriation, social science literatures on public health, and medical anthropology, this article suggests that persons enthusiastic for legalization confuse consumer desire with a commitment to social justice when they suggest that state-controlled legalized marijuana, in the context of neoliberal capitalism, represents an anti-imperialist social good. Social scientists are invited to remain vigilant about their potential complicity in the racialized class-making politics of public health in its intersection with shifting marijuana laws.

Mothers\u2019 and father\u2019s perceptions of the risks and benefits of screen time and physical activity during early childhood: a qualitative study

BackgroundThis study sought to explore mothers’ and fathers’ perceptions of the risks and benefits of screen time and active play during early childhood.MethodsIn-depth semi structured telephone interviews were conducted with mothers and fathers (n = 28) of children aged 3–5 years who had earlier taken part in a larger quantitative study in Australia and identified willingness to be re-contacted were recruited. Interviews were audio recorded, transcribed verbatim, and analysed using NviVo. Coding was performed to produce themes. Quotes were extracted from the transcripts to illustrate common responses. COREQ guidelines for qualitative papers were followed.ResultsParents reported active play was beneficial for many health and developmental outcomes such as imagination, enjoyment and socialisation, while reporting risks such as safety and stranger danger. There were mixed perceptions of screen time, with benefits such as learning, education and relaxation, and risks including habit formation, inappropriate content, negative cognitive and social outcome, and detriments to health being reported. A few differences between mothers’ and fathers’ perceptions were evident.ConclusionThis study identified that some parental perceptions of benefits and risks of screen time and active play were consistent with published evidence, while others were contradicted by current evidence. Future studies should consider evidence-based education to ensure parents are aware of evidence-based outcomes of children’s behaviours. Interventions may wish to capitalise on parents perceived benefits to enhance engagement.

Mobile User Perception Factors for Express Bus Safety Journey Management System: A Survey Analysis

Public transportation represents a higher danger of safety and security as there happen to be more travellers in a single vehicle. In Malaysia, bus accident is the highest that occurred to death. Internet of Things (IoT) has expanded the utilization of 4IR for investigation and research. A 4IR mobile technology app for express bus safety and security system in Malaysia for bus user is suggested and required. It is important to identify the main factors that can be collected via the mobile app before the app is developed. Passenger perception on the used and relevancy of using information technology (IT) tools to increase their safety perception is also required. This information will give the developer an insight on the app usability. In this paper, observation from passengers regarded safety and security factors are gathered and investigated by utilizing the IT and non-IT related issue. From the survey, majority respondent agree with all seven IT related issues (at least 70%) and all eight non-IT related issues (at least 80%). This is important to understand the mobile user perceptions and provides safety to the passengers. From these factors, we proposed a conceptual framework for express bus safety journey management system to be developed in the future. Future speculation by enhancing existing express transport arrangement with varies variable information, for example, waiting time, unwavering quality and travel time. This information can positively affect the nature of express transport administrations. Gathered information is stored in the cloud. The express bus management can collect the information from the cloud to enhance safety and security of bus express.

Research on Safety Risk Pre-control Management System and Its Application in Coal Mines

In order to minimize safety accidents in coal mines, this paper starts from the basic theory on risk management, summarizing the status quo of work safety and existing problems in China’s coal mines. Based on the present safety risk pre-control management system of coal mines, a new safety risk pre-control management system satisfying hazard identification, assessment and management standard formulation process is designed. Through the implementation of the system, a systematic prevention management mechanism and effective preventive and control measures ensure that all kinds of safety dangers fall within the tolerable scope of coal mines.