scispace - formally typeset
Search or ask a question

How often do you need to replace Kidde smoke detectors? 

Answers from top 7 papers

More filters
Papers (7)Insight
The sensors are best for combination with other techniques, such as smoke detectors.
This is critical in scenarios where traditional smoke detectors cannot be installed.
The results of these experiments show that the smoke detectors, especially the ionization detector, are sensitive to cooking fumes and nuisance alarms are easy to happen.
However, the learning of smoke representation in the detectors will be restricted by the appearance gap between real and synthetic smoke samples, which will cause a significant performance drop.
Whereas the self-reported prevalence of home smoke detectors is high in our study population, other fire safety practices are suboptimal.
Alarm algorithms utilizing ionization detector smoke measurements proved to be more effective than measurements from photoelectric detectors.
The current alarm algorithm resulted in better overall performance than the commercial smoke detectors, by providing both improved nuisance source immunity with generally equivalent or faster response times.

See what other people are reading

Is cursing a bullying in a school environment?
5 answers
Cursing can indeed be considered a form of bullying in a school environment. Research from various studies highlights that bullying encompasses various behaviors, including cursing, which can lead to psychological and emotional harm among students. Studies from different regions like Russia, Italy, Romania, and Australia emphasize the significance of addressing bullying in schools to ensure a safe and conducive learning environment. Teachers' perceptions and experiences in dealing with bullying incidents further underscore the detrimental effects of such behaviors on students' well-being. The presence of pejorative nicknames, cursing, and other forms of verbal abuse in schools is indicative of the prevalence of bullying, necessitating effective preventive measures and interventions to combat this negative phenomenon and promote a positive school climate.
How can changes in pH measurement identify H2S formation in seawater?
5 answers
Changes in pH measurement techniques can help identify H2S formation in seawater. Traditional potentiometric pH probes lack the sensitivity required for precise detection of ocean acidification. Spectrophotometric pH measurements directly in sampling bottles minimize errors due to sample handling, achieving consistent results that meet stringent standards. The formation of H2S in natural waters is influenced by redox conditions, solubility changes, and bacterial activity at interfaces between anoxic and oxic waters. A novel colorimetric method utilizing a buried double p-n junction (BDJ) detector offers a cost-effective and reliable solution for seawater pH determination without the need for spectrophotometers. The dissociation of H2S in seawater has been studied as a function of salinity and temperature, providing valuable insights into pH variations related to H2S formation.
What is the strength in climbers?
10 answers
Strength in climbers is a multifaceted attribute that encompasses various physical and motor skills, crucial for performance in sport climbing. Research indicates that handgrip strength (HGS) is significantly higher in boulder climbers compared to lead and speed climbers, highlighting the importance of grip strength in climbing performance. Factors such as experience, body mass index (BMI), finger strength, and body fat percentage also play critical roles in determining a climber's handgrip strength. The structure of strength in sport climbers can be categorized into three significant factors: general and specific static strength, repetitive strength, and explosive strength, collectively explaining a substantial portion of the variance in climbers' strength profiles. Climbers, by nature, exhibit an exceptional economy of movement and resource utilization, which, while not directly related to human sport climbers, metaphorically underscores the efficiency and adaptability required in climbing. Implementing sport climbing in training has been shown to positively influence strength parameters, suggesting that climbing itself can be an effective means of developing strength, especially after puberty. Elite climbers demonstrate greater finger strength and arm endurance compared to advanced climbers, with specific physical characteristics such as lower calf circumference also being associated with higher climbing performance. The evaluation of strength and endurance in climbers through specific tests indicates that finger and forearm muscle strength, along with resistance to fatigue, are paramount for achieving elite levels in climbing. Forearm muscle strength and endurance, particularly the ability to maintain high forces during sustained muscle contractions, are critical for high-level rock climbing performance. Laboratory tests have shown that climbers possess significantly better pinch and whole hand grip strength and endurance than non-climbers, although hand strength alone does not guarantee climbing success. Finally, physical fitness assessments of rock climbers reveal that cardio-respiratory fitness and dynamic strength of upper extremities are key factors in sport climbing, with male climbers generally exhibiting stronger performance than female climbers.
What turns peoples into criminals?
5 answers
People can turn to a life of crime due to various factors highlighted in the provided contexts. Economic downturns, as discussed in, can lead individuals, especially young people leaving school during recessions, to have a higher likelihood of engaging in criminal activities. Additionally, dysfunctional family environments, as mentioned in, can contribute to criminal behavior, especially within low socioeconomic strata where aggression, impulsivity, and dyscontrol are prevalent. Furthermore, societal and personal frustrations, as discussed in, can also play a role in driving individuals towards criminal acts. Moreover, conformity, the allure of power, and the influence of situational factors, as highlighted in, can lead ordinary individuals to commit cruel acts. These combined factors shed light on the complex interplay of economic, familial, societal, and psychological influences that can turn people towards criminal behavior.
How effective is laser speckle imaging in detecting Peripheral Arterial Disease (PAD) compared to other diagnostic methods?
5 answers
Laser speckle imaging has shown promising effectiveness in detecting Peripheral Arterial Disease (PAD) compared to other diagnostic methods. The optical sensor based on laser speckle techniques provides contactless measurement of anatomical sites, distinguishing between low perfused and healthy feet with high accuracy. Additionally, laser speckle contrast imaging (LSCI) has been studied for detecting stenosis in arteries non-invasively, showing potential for early detection of atherosclerosis. These findings suggest that laser speckle imaging, with its ability to analyze time-changing speckle patterns, offers a simple, inexpensive, and effective method for monitoring PAD, potentially suitable for home use or in community clinics.
What are the imapcts of peer pressure on high school students?
4 answers
Peer pressure among high school students has various impacts on their behavior and well-being. Research indicates that peer victimization affects around 7.2% of students, leading to negative outcomes like depression. Additionally, the relationship between peer pressure and self-efficacy expectations shows that higher levels of peer pressure are associated with lower general and academic self-efficacy expectations. Attachment to friends plays a role in adolescents' susceptibility to peer pressure, with different predictors for boys and girls. Aggression among adolescents is significantly related to peer pressure, highlighting the influence of peers on aggressive behavior. However, a study on adolescent social behavior found no significant impact of peer pressure on variables like social behavior, self-concept, gender, and parental rearing patterns.
What is Confusion matrix?
5 answers
A confusion matrix is a fundamental tool in evaluating machine learning models by comparing predicted class labels with actual class labels across all data instances. It is commonly used in various classification problems. The concept has been extended to hierarchical classification problems, directed acyclic graphs, multi-path labeling, and non-mandatory leaf-node prediction, enhancing its applicability and relevance in modern applications. Researchers have explored using confusion matrices to assess the performance of corner detection algorithms, such as Global and Local Curvature Scale space (GLCSS), Affine Resilient Curvature Scale Space (ARCSS), and Harris, demonstrating its versatility beyond traditional classification tasks. Additionally, efforts have been made to develop visual analytics systems like Neo to handle complex data structures, enabling practitioners to interact with hierarchical and multi-output confusion matrices effectively.
How do cultural differences and socioeconomic factors influence public response to flood warnings?
4 answers
Cultural differences and socioeconomic factors play crucial roles in shaping public responses to flood warnings. Studies on urban communities in Nigeria highlighted how cultural and social attributes inspire adaptive capacity against floods. Research in Zhengzhou, China, and Leeds, United Kingdom, emphasized that education levels and disposable income influence households' flood preparedness, showcasing the impact of socioeconomic factors. Additionally, the efficiency of flood early warning systems is intricately linked to social collective trust in authorities and experts, with trust being more critical in societies with infrequent flood events, emphasizing the influence of cultural aspects on public response to warnings. Overall, these findings underscore the significance of considering cultural and socioeconomic factors in enhancing public preparedness and response to flood warnings.
How to decrease the smoky/ashy/undesirable aroma during curing and especially quick drying in vanilla beans?
5 answers
To decrease the smoky/ashy/undesirable aroma during curing and quick drying in vanilla beans, a method involving mild hot water blanching, sweating at 35–45 °C, and rapid drying is recommended. This process helps retain high concentrations of vanillin and other flavor compounds while maintaining high sensory quality ratings. Additionally, the metabolite analysis of cured vanilla beans shows that the total peak intensity increases during curing stages, with specific compounds like vanillin increasing while glucovanillin decreases. Radiation processing of cured vanilla beans has been studied to enhance aroma quality by breaking down glycosidic precursors, potentially increasing vanillin content. By following these methods, it is possible to reduce the undesirable smoky/ashy aroma during curing and quick drying of vanilla beans while preserving their flavor profile and quality.
Does a school girl have legal obligation to pay money to another school girl in South Africa?
5 answers
In South Africa, a school girl may have legal obligations regarding money owed to another school girl, especially in cases of bullying or unjust enrichment. Legal responses to issues like bullying, including cyberbullying, are available under South African law, although the effectiveness of legal action in such cases is debatable. When it comes to financial obligations, distinctions are made between contractual and non-contractual obligations, with the place of payment and currency considerations typically governed by the lex causae or lex fori, depending on the situation. The evolving landscape of unjust enrichment law in South Africa suggests a shift towards a more independent approach, potentially impacting obligations related to financial matters between individuals, including school girls.
What is the relationship between body fat percentage and sprint speed in female athletes?
5 answers
Body fat percentage in female athletes has a significant impact on sprint speed. Research shows that lower body fat percentages are associated with better sprint performances in female athletes. Studies have found that there is a negative correlation between body fat percentage and sprint times, indicating that lower body fat is linked to faster sprint speeds. Additionally, the percentage of body fat has been shown to have a detrimental effect on sprint performances, with excess body fat leading to decreased speed and endurance in female athletes. Therefore, maintaining lower body fat percentages is crucial for enhancing sprint speed and overall performance in female athletes.