Effect of safety valve types on the gas venting behavior and thermal runaway hazard severity of large-format prismatic lithium iron phosphate batteries

The safety valve is an important component to ensure the safe operation of lithium-ion batteries(LIBs).However,the effect of safety valve type on the thermal runaway(TR)and gas venting behavior of LIBs,as well as the TR hazard severity of LIBs,are not known.In this paper,the TR and gas venting behavior of three 100 A h lithium iron phosphate(LFP)batteries with different safety valves are investigated under overheating.Compared to previous studies,the main contribution of this work is in studying and evaluating the effect of gas venting behavior and TR hazard severity of LFP batteries with three safety valve types.Two significant results are obtained:(Ⅰ)the safety valve type dominates over gas venting pressure of battery during safety venting,the maximum gas venting pressure of LFP batteries with a round safety valve is 3320 Pa,which is one order of magnitude higher than other batteries with oval or cavity safety valve;(Ⅱ)the LFP battery with oval safety valve has the lowest TR hazard as shown by the TR hazard assessment model based on gray-fuzzy analytic hierarchy process.This study reveals the effect of safety valve type on TR and gas venting,providing a clear direction for the safety valve design.

Assessment of knowledge,cultural beliefs,and behavior regarding medication safety among residents in Harbin,China

BACKGROUND Medication misuse or overuse is significantly associated with poor health outcomes.Information regarding the knowledge,cultural beliefs,and behavior about medication safety in the general population is important.AIM To conduct a survey on medication habits and explored the potential factors impacting medication safety.METHODS The current survey included adults from 18 districts and counties in Harbin,China.A questionnaire on medication safety was designed based on knowledge,cultural beliefs,and behavior.Both univariate and multivariate analyses were used to explore the factors that impacted medication safety.RESULTS A total of 394 respondents completed the questionnaires on medication safety.The mean scores for knowledge,cultural beliefs,and behavior about medication safety were 59.41±19.33,40.66±9.24,and 60.97±13.69,respectively.The medication knowledge score was affected by age(P=0.044),education(P<0.001),and working status(P=0.015).Moreover,the cultural beliefs score was significantly affected by education(P<0.001).Finally,education(P=0.003)and working status(P=0.011)significantly affected the behavior score.CONCLUSION The knowledge,cultural beliefs,and behavior about medication safety among the general population was moderate.Health education should be provisioned for the elderly,individuals with a low education level,and the unemployed to improve medication safety in Harbin,China.

Influences of Mixed Traffic Flow and Time Pressure on Mistake-Prone Driving Behaviors among Bus Drivers

Bus safety is a matter of great importance in many developing countries, with driving behaviors among bus drivers identified as a primary factor contributing to accidents. This concern is particularly amplified in mixed traffic flow (MTF) environments with time pressure (TP). However, there is a lack of sufficient research exploring the relationships among these factors. This study consists of two papers that aim to investigate the impact of MTF environments with TP on the driving behaviors of bus drivers. While the first paper focuses on violated driving behaviors, this particular paper delves into mistake-prone driving behaviors (MDB). To collect data on MDB, as well as perceptions of MTF and TP, a questionnaire survey was implemented among bus drivers. Factor analyses were employed to create new measurements for validating MDB in MTF environments. The study utilized partial correlation and linear regression analyses with the Bayesian Model Averaging (BMA) method to explore the relationships between MDB and MTF/TP. The results revealed a modified scale for MDB. Two MTF factors and two TP factors were found to be significantly associated with MDB. A high presence of motorcycles and dangerous interactions among vehicles were not found to be associated with MDB among bus drivers. However, bus drivers who perceived motorcyclists as aggressive, considered road users’ traffic habits as unsafe, and perceived bus routes’ punctuality and organization as very strict were more likely to exhibit MDB. Moreover, the results from the three MDB predictive models demonstrated a positive impact of bus route organization on MDB among bus drivers. The study also examined various relationships between the socio-demographic characteristics of bus drivers and MDB. These findings are of practical significance in developing interventions aimed at reducing MDB among bus drivers operating in MTF environments with TP.

Evaluation of the Impact of Driver Behavior on Back of Queues Events in Work Zones Using the SHRP2 Naturalistic Driving Study Data

The SHRP2 Naturalistic Driving Study was used to evaluate the impact of various work zone and driver characteristics on back of queue safety critical events (crash, near-crash, or conflicts) The model included 43 SCE and 209 “normal” events which were used as controls. The traces included representing 209 unique drivers. A Mixed-Effects Logistic Regression model was developed with probability of a SCE as the response variable and driver and work zone characteristics as predictor variables. The final model indicated glances over 1 second away from the driving task and following closely increased risk of an SCE by 3.8 times and 2.9 times, respectively. Average speed was negatively correlated to crash risk. This is counterintuitive since in most cases, it is expected that higher speeds are related to back of queue crashes. However, most queues form under congested conditions. As a result, vehicles encountering a back of queue would be more likely to be traveling at lower speeds.

Development of a Sports Safety Promotion Framework Based on KABP Theory and 4M Management

This study explores the significance,current research landscape,and conceptualization of sports safety promotion.Safety in sports is fundamental to youth physical activities,and an excessive focus on or neglect of safety is unwarranted.Globally,numerous countries have extensively researched sports safety promotion and implemented diverse strategies.Drawing from KABP(Knowledge,Attitude,Behavior,Practice)theory and 4M(Man,Machine,Medium,Management)management,this paper presents a conceptual framework for sports safety promotion.It integrates these theories to devise a comprehensive accident prevention model within a sports safety promotion system.The framework prioritizes enhancing students’safety literacy and underscores the practical application of safety knowledge and skills in simulated sports settings following structured safety education.It aims to enhance students’competency and proficiency in averting sports-related injuries.

Impacts of the COVID-19 pandemic on consumers’ food safety knowledge and behavior in China

This study assesses the impacts of the COVID-19 pandemic on Chinese residents’food safety knowledge and behavior,and explores the possible influence mechanism,namely,focus on media information.The study is based on internet survey data of 1373 residents in China.A series of econometric models are developed to estimate food safety knowledge and behavior of residents.Both the descriptive and econometric results indicate that the existence of COVID-19 cases in a community has a significantly positive effect on residents’food safety knowledge and behavior.Residents focusing on food safety-related information tend to have higher food safety knowledge and practice food safety behavior.When controlling the variable focused on food safety-related information,the marginal effects of the existence of COVID-19 cases in a community on residents’food safety knowledge and behavior significantly decrease.However,the decrease in consumers’food safety knowledge is quite minor.Hence,the COVID-19 pandemic indeed improves Chinese residents’food safety knowledge and behavior,while focus on food safety-related information is an important mechanism for improving food safety behavior.Moreover,the estimation results of the simultaneous equations model reveal that consumers’food safety knowledge has a significant and positive effect on their food safety behavior.Heterogeneous impacts of the COVID-19 pandemic on residents’food safety knowledge and behavior among different regions and income groups are observed.The findings of this study provide evidence that public health events could enhance residents’safety awareness and behavior,while residents’focus on relevant information plays an important role in improving knowledge and impacting behavior.

Explosion behavior investigation and safety assessment of large-format lithium-ion pouch cells

Large-format lithium-ion(Li-ion) batteries with high energy density for electric vehicles are prone to thermal runaway(or even explosion) under abusive conditions. In this study, overcharge induced explosion behaviors of large-format Li-ion pouch cells with Li[NiCoMn]Ocathode at different current rates(C-rates)(0.5C, 1C, 2C) were investigated. The explosion characteristics of the cells were elucidated by discussing the evolution of the cell voltage, the surface temperature and the shock wave pressure.Generally, the whole overcharge process could be divided into four stages according to the evolution of several key parameters and the overcharge behaviors;the overcharge C-rate has a great influence on cells’ thermal behaviors. The experimental results showed that the thermal runaway process of Liion cells caused by overcharging consisted of two kinds of explosions, physical explosion and chemical explosion. The existence of observable negative pressure zone in the pressure curves indicated that the Li-ion cells are not a self-supplying oxygen system during the explosion. Further, the explosion dynamics parameters were matched. An explosion TNT-equivalent conversion strategy that depended on the pressure of the shock wave was utilized to evaluate the released energy and its hazards. In addition, with respect to the overcharge of Li-ion pouch cells, a safety assessment method and a safety management method were proposed based on the explosion behaviors. From the perspective of battery safety, this study is of great significance for the safety design of Li-ion cells and can provide guidance for engineers to optimize the safety function of battery packs.

Practice, Behavior, Knowledge and Awareness of Food Safety among Secondary &Tertiary Level Students in Trinidad, West Indies

The aim of this study was to assess the level of food safety practice, knowledge, behavior and awareness among n = 205 Trinidadian students (mean age 18±) enrolled within the education system in the Republic of Trinidad and Tobago, West Indies and to explore the association between these variables and the demographic and educational characteristics. To address these concerns, participants enrolled within the secondary (high school) and tertiary (university) institutions in Trinidad were questioned (16 questions) on food buying habits, preparation, attitudes, behaviors, knowledge and awareness. The data were analyzed using SPSS for descriptive, frequency distribution and percentages. Pearson chi square tested the association between food safety behaviors and awareness in relation to gender, age and educational level. Findings indicated that 76%of the students “always” washed their hands after touching raw chicken/meats and fish, while 50% utilized separate cutting boards/knives for raw chicken/meat and fish. Many students (68%) believed that it was “very safe” to only rinse cutting boards used for raw chicken/meat and fish. Others (10%) believed it was “very safe” to defrost foods outside the refrigerator, and 25% reported that it was “safe” to leave hot foods at room temperature for more than four hours. The level of food safety practice and behavior was higher (p < 0.05) among the female students at the secondary school level than those at the tertiary level. There was no difference in the median (20/45) and mode (25/45) scores for food safety behavior between the two educational groups but the difference (p < 0.01) was significant for awareness. Food safety practice, behavior and awareness skills of males at the secondary level were significantly lower (p < 0.01) than the females. These results strengthen the need for continuous educational programs to improve food safety awareness skills of Trinidadian students.

A Cognitive Perspective on the Safety Communication Factors That Affect Worker Behavior

Communication is vital for construction safety, but how it influences unsafe behavior in the work-place remains unclear. This study aims to explore the relationships between communication, cognitive failure, and unsafe behaviors in order to clarify those mechanics. We defined communication as management input, worker cognitive failure as process, and actual behaviors as management output. We collected data from three Chinese steel construction crews and utilized experience/behavior sampling and questionnaire surveys to collect project information. Bivariate statistical analyses were conducted to explain how communication affected unsafe behavior. The results showed that, rather than communication frequency, management communication style was significantly related to worker cognitive failure;specifically, communication style was related to perception of convenience and self-capacity, which could be upstream factors explaining unsafe behavior at the construction jobsite. This research provided statistical evidence supporting the hypothesized association among safety communication, cognitive failure, and behavior, bridging the missing gaps of previous research. Nonetheless, readers should interpret the results cautiously because of the limitations listed as follows. First, sample size is relatively small. In addition, crew turnover may mediate the relationship between communication and safe behaviors therefore, the impact of communication on cognitive failure can be blurred and a longitudinal study on specific crews working on the same job site could be used to evaluate it. Third, future research should focus on communication style, as it directly relates to the human cognitions that affect unsafe behavior at construction sites.

Vehicles, Advanced Features, Driver Behavior, and Safety: A Systematic Review of the Literature

Driver errors contribute to more than 94% of traffic crashes. Automotive companies are striving to enhance their vehicles to eliminate driver errors and reduce the number of crashes. Various advanced features like lane departure warning (LDW), blind spot warning (BSW), over speed warning (OSW), forward collision warning (FCW), lane keep assist (LKA), adaptive cruise control (ACC), cooperative ACC (CACC), and automated emergency braking (AEB) are designed to assist with, or in some cases take over, certain driving maneuvers. They can be broadly categorized into advanced driver assistance system (ADAS) and automated features. Each of these advanced features focuses on addressing a particular task of driving, thereby, aiding the driver, influencing their behavior, and enhancing safety. Many vehicles with these advanced features are penetrating into the market, yet the total reported number of crashes has increased in recent years. This paper presents a systematic review of these advanced features on driver behavior and safety. The review is categorized into 1) survey and mathematical methods to assess driver behavior, 2) field test methods to assess driver behavior, 3) microsimulation methods to assess driver behavior, 4) driving simulator methods to assess driver behavior, and 5) driver understanding and the effectiveness of advanced features. It is followed by conclusions, knowledge gaps, and need for further research.

Impact of related subjects' behavior on agricultural products' quality safety

With the frequent occurrence of agricultural product safety incidents in recent years, the agricultural products' quality safety has become more and more concerned by the people. The relevant subjects are the direct relationship with the quality safety of agricultural products, and play a key role in ensuring the quality safety of agricultural products. This paper analyzes the behavior performance of production subject, circulation subject, consumption subject, supervision subject on agricultural products' quality safety, and puts forward the following countermeasures to improve the quality safety of agricultural products according to their behavior performance: to regulate the production of agricultural products, to strengthen the management and control agricultural inputs, to improve the safety supervision system of agricultural products, to accelerate the development of new circulation subject, to actively cultivate and develop new types agricultural business, to accelerate the process of agricultural scale management, to establish the multiple supervision subject, and to make up the regulatory loopholes.

Physician disruptive behaviors: Five year progress report

Disruptive behaviors in health care can have a significant adverse effect on staff interactions that can negatively impact staff satisfaction, staff performance, and patient outcomes of care. As referenced in a previously published article, the Obstetrics and Gynecology specialty is one of the service areas where these behaviors occur more frequently. Despite growing evidence of the ill effects of these types ofbehaviors many organizations are still having a difficult time in addressing these issues in an effective manner. Gaining a better understanding of the nature, causes, and impact of these behaviors is crucial to finding the right remedies for solution. Nobody intentionally starts the day planning to be disruptive, it's just that things get in the way. A combination of deep seated factors related to age and gender preferences, culture and ethnicity, life experiences, and other events that help shape values, attitudes and personalities, and more external factors related to training, environmental pressures, stress and burnout, and other personal issues all contribute to the mix. Given the complexities of today's health care environment, each person needs to recognize the importance of being held accountable for appropriate actions and behaviors that affect work relationships and care coordination that impact patient care. Early recognition, early intervention, and taking a pro-active supportive approach to improve individual behaviors will result in better relationships, less disruption, more satisfaction, and better outcomes of care.

Leadership Behaviors, Organizational Culture, and Incidents Reporting Practices as Perceived by Jordanian Nurses, Literature Review

Background: Safety of patients and their families is recognized as a priority for all healthcare organizations all over the world;therefore, exploring the variables that influence patient safety issues is paramount. Objective: This literature review is to detect the gab in the body of knowledge regarding issues of incidents reporting practices, leadership behaviors, and organizational culture especially in Jordanian context, as well as, to give reflection about the searched studies and to address the strength and weakness points of each study as well. The design of the current article was literature review of twenty five studies. Results: The current review revealed that most of the research studies were conducted in order to explore the perceptions of healthcare providers about patient safety issues, and clinical incidents reporting practices as well, however, there are few studies that were conducted in order to investigate the influence of leadership behaviors and organizational culture on incidents reporting practices as perceived by Jordanian hospitals’ registered nurses. Moreover, it seems that in Jordanian context, it is not fully understood the influence of leadership behaviors and organizational culture on incidents reporting practices as perceived by Jordanian hospitals’ registered nurses. Conclusion: It is imperative for researchers to fill the gap that existed in the body of knowledge regarding the variables of leadership behaviors, hospitals’ organizational culture and incidents reporting practices in order to enhance patient safety and safety practices in health care organizations. Relevance to clinical practice: Exploring the influence of leadership behaviors and organizational culture on incidents reporting practices among registered nurses in Jordan is highly recommended. Finally, the current review identifies the gap in the body of knowledge regarding the mentioned above variables.

Insensitivity to Unethical Behavior in Dictator Game When Indirectly Intermediated-Implications of Indirect Blindness for Safety Management

The aim of this study was to demonstrate that indirect mediation in behaviors leads to insensitivity to unethical behavior through a dictator game and to give some implications for safety management. The indirect involvement in the unethical behavior such as the violation of regulation is believed to lessen the responsibility and the criticism from others for the unethical behavior as compared to the direct involvement in it. The instruction condition for the evaluator of behavior in a dictator game was taken up as an experimental variable. Instruction condition 1 was to pay attention to the behavior of only a dictator. In instruction condition 2, the participant (evaluator) was required to review all players’ behavior and evaluate a dictator. It has been investigated whether allowing indirect actions (mediations) leads to reduced punishment as a function of the instruction condition. While the punishment to the indirectness did not get smaller for instruction condition 2, the punishment to the indirectness tended to get smaller only for instruction condition 1.

Nurses’ clinical alarm-related behaviors and influencing factors in China

Objective:To explore the nurses’behaviors regarding clinical alarms,analyze the related influencing factors,and provide rationales for alarm management.Methods:A cross-sectional survey was conducted in China.The self-made questionnaire of nurses’clinical alarm-related knowledge,attitude,and behavior(NCAKAB)was used.Results:The valid response rate was 98.66%(n=2368).The average nurses’clinical alarm-related behaviors(NCAB)score was 65.14±7.95(out of 85).The dimension scores of NCAB from high to low were alarm learning(4.02±0.85,out of 5),alarm response(27.99±3.64,out of 35),alarm setting(19.24±3.88,out of 25),alarm recognition(7.63±1.68,out of 10)and alarm notification(6.25±1.84,out of 10).There were significant differences in alarm behavior scores between nurses of different ages(F=4.619,P=0.000),nursing stints(F=9.564,P=0.000),professional titles(F=4.425,P=0.004),departments(F=9.166,P=0.000),and hospital levels(t=2.705,P=0.007).The study showed that nurses’total alarm behavior scores were positively correlated with the total alarm knowledge score(r=0.267;P<0.001)and the total alarm attitude score(r=438;P<0.001).Conclusions:Nurses scored highest in alarm learning,followed by alarm response,alarm setting,alarm recognition,and alarm notification behavior.The factors that influenced alarm behavior included age,title,department,nursing stint,hospital level,professional title,alarm-related training,willingness to participate in alarm-related training,whether or not departments have improved alarm management over the last 3 years,and whether or not departments have formulated norms for alarm management.Nurses with higher scores for clinical alarm knowledge had higher correlating scores for alarm behavior;similarly,nurses with higher scores for clinical alarm attitude had higher scores for alarm-related behavior.

Development and Impact Behaviors of FRP Guarder Belt for Side Collision of Automobiles

In automobiles, the CFRP （carbon fiber reinforced plastics） has a possibility of weight reduction in automotive structures which can contribute to improve mileage and then reduce carbon dioxide. On the other hand, the safety of collision should be also made clear in the case of employing the CFRP to automotive structures. In this paper, the CFRP guarder belt equipped in the automotive door is developed and examined by an experiment and a numerical analysis for replacing the conventional steel door guarder beam. As the experimental relation of impact load to displacement for CFRP guarder belt agreed well with that of numerical result, the numerical method developed here is quite useful for estimating impact behaviors of CFRP guarder belt.

BARN:Behavior-Aware Relation Network for multi-label behavior detection in socially housed macaques

Quantification of behaviors in macaques provides crucial support for various scientific disciplines,including pharmacology,neuroscience,and ethology.Despite recent advancements in the analysis of macaque behavior,research on multi-label behavior detection in socially housed macaques,including consideration of interactions among them,remains scarce.Given the lack of relevant approaches and datasets,we developed the Behavior-Aware Relation Network(BARN)for multi-label behavior detection of socially housed macaques.Our approach models the relationship of behavioral similarity between macaques,guided by a behavior-aware module and novel behavior classifier,which is suitable for multi-label classification.We also constructed a behavior dataset of rhesus macaques using ordinary RGB cameras mounted outside their cages.The dataset included 65?913 labels for19 behaviors and 60?367 proposals,including identities and locations of the macaques.Experimental results showed that BARN significantly improved the baseline SlowFast network and outperformed existing relation networks.In conclusion,we successfully achieved multilabel behavior detection of socially housed macaques with both economic efficiency and high accuracy.

Analysis of Stopping Behavior at Rural T-Intersections Using Naturalistic Driving Study Data

Rural intersections account for around 30% of crashes in rural areas and 6% of all fatal crashes, representing a significant but poorly understood safety problem. Crashes at rural intersections are also problematic since high speeds on intersection approaches are present which can exacerbate the impact of a crash. Additionally, rural areas are often underserved with EMS services which can further contribute to negative crash outcomes. This paper describes an analysis of driver stopping behavior at rural T-intersections using the SHRP 2 Naturalistic Driving Study data. Type of stop was used as a safety surrogate measure using full/rolling stops compared to non-stops. Time series traces were obtained for 157 drivers at 87 unique intersections resulting in 1277 samples at the stop controlled approach for T-intersections. Roadway (i.e. number of lanes, presence of skew, speed limit, presence of stop bar or other traffic control devices), driver (age, gender, speeding), and environmental characteristics (time of day, presence of rain) were reduced and included as independent variables. Results of a logistic regression model indicated drivers were less likely to stop during the nighttime. However presence of intersection lighting increased the likelihood of full/rolling stops. Presence of intersection skew was shown to negatively impact stopping behavior. Additionally drivers who were traveling over the posted speed limit upstream of the intersection approach were less likely to stop at the approach stop sign.

交通安全意识对非机动车骑行者危险骑行行为的影响研究

安全意识在促进安全行为方面发挥着重要作用,但由于安全意识具有多维性和复杂性,难以直接测量。为探究交通安全意识对危险骑行行为的影响,通过云模型选取安全态度、危险认知、安全素质和外界环境这4个潜变量,作为影响交通安全意识的结构要素,并基于调查问卷数据开展实证研究。运用Mplus 8.0软件构建“交通安全意识-危险骑行行为”结构方程模型,量化交通安全意识各要素作用于危险骑行行为的因果链路。采用Bootstrap法检验安全素质、危险认知和安全态度的中介作用,梳理外界环境对危险骑行行为的直接和间接关系;再利用分层回归模型,验证交通安全知识在交通安全意识与危险骑行行为间的调节效应。研究结果表明:①结构方程模型拟合良好,交通安全意识的4个要素分别与危险骑行行为呈显著的负相关,其中,危险认知对无意行为的影响最大(-0.331),安全态度对有意行为的影响最大(-0.332);②中介效应显示外界环境作为外生变量可直接作用于行为,也可通过安全素质、危险认知和安全态度对骑行者的行为产生影响;③交通安全知识的调节作用显著(ΔR^(2)=0.017,P<0.05),该变量强化了交通安全意识与危险骑行行为的负向影响关系,其简单斜率关系表明,当骑行者交通安全知识水平较高时,交通安全意识对危险骑行行为的作用效果更强。

Impact of countdown signals on traffic safety and efficiency:a review and proposal

Countdown signals for motorized vehicles,which are intended to ensure safety on the road and regulate motor vehicle speed limits at road intersections,are still considered a relatively novel concept.These signals have been adopted by only a few countries,and the number of cities that use them is limited.This review aims to summarize the effects of countdown signals on traffic safety and efficiency and to determine the consistency and differences of existing research propositions on the matter.Based on the review,considerable research presents evidently different conclusions in the areas of driver red-light running and traffic safety.Particularly,some studies propose that countdown signals reinforce traffic safety,whereas others consider that such signals adversely affect traffic safety.Meanwhile,related literature provides varying conclusions on the aspect of traffic efficiency for vehicle headway.At present,the number of studies conducted regarding the driving behaviors of motorists toward countdown-signalized intersections is insufficient.Accordingly,such inadequate diversity in research causes difficulty in completely assessing the benefits and disadvantages of countdown signals.In this paper,an important future research direction on microcosmic driving psychological and physiological data combined with macro-driving behavior is proposed.