scholarly journals An analysis of the impact of agricultural tractor seat cushion materials to the level of exposure to vibration

2017 ◽  
Vol 36 (2) ◽  
pp. 116-123 ◽  
Author(s):  
Boban Cvetanovic ◽  
Dragan Cvetković ◽  
Momir Praščević ◽  
Miljan Cvetković ◽  
Milan Pavlović
Keyword(s):  
Harmful Effect ◽  
Health Problems ◽  
The Body ◽  
Long Period ◽  
Seat Cushion ◽  
High Level ◽  
The Impact ◽  
Harmful Effects ◽  
Agricultural Tractor ◽  
Tractor Engine

During everyday operations with tractors, drivers are exposed to harmful effects of various factors. In addition to unfavourable temperature and humidity, dust and noise, one of the factors harmful to driver’s health is vibrations. They come from the tractor engine and from the roughness of the ground and are transferred to the cab and through the seat to the body of the driver. In case of high level magnitude vibrations and a long period of exposure to them, many health problems occur. The harmful effect of the vibrations is especially obvious in older models of tractors. High intensities of vibrations (above permitted limits) were found during the measurements of vibrations at the driver seat in such tractors. This study is an attempt to reduce the vibration levels using various vibration-absorbing components, such as cushions, at driver’s seat. The results of the measurements showed that the vibration levels were significantly lower in comparison to original seats.

Making Up 3D Bodies

2021 ◽  
Vol 4 (2) ◽  
pp. 1-9
Author(s):  
Kiona Hagen Niehaus ◽  
Rebecca Fiebrink
Keyword(s):  
Software Tool ◽  
The Body ◽  
Design Parameters ◽  
Artistic Practice ◽  
Human Form ◽  
Modeling Systems ◽  
Exploratory Approach ◽  
Disability Status ◽  
High Level ◽  
The Impact

This paper describes the process of developing a software tool for digital artistic exploration of 3D human figures. Previously available software for modeling mesh-based 3D human figures restricts user output based on normative assumptions about the form that a body might take, particularly in terms of gender, race, and disability status, which are reinforced by ubiquitous use of range-limited sliders mapped to singular high-level design parameters. CreatorCustom, the software prototype created during this research, is designed to foreground an exploratory approach to modeling 3D human bodies, treating the digital body as a sculptural landscape rather than a presupposed form for rote technical representation. Building on prior research into serendipity in Human-Computer Interaction and 3D modeling systems for users at various levels of proficiency, among other areas, this research comprises two qualitative studies and investigation of the impact on the first author's artistic practice. Study 1 uses interviews and practice sessions to explore the practices of six queer artists working with the body and the language, materials, and actions they use in their practice; these then informed the design of the software tool. Study 2 investigates the usability, creativity support, and bodily implications of the software when used by thirteen artists in a workshop. These studies reveal the importance of exploration and unexpectedness in artistic practice, and a desire for experimental digital approaches to the human form.

EFFECT OF CARBON MONOXIDE ON THE RATE OF EXCRETION OF ETHANOL BY KIDNEYS

2021 ◽  
pp. 15-21
Author(s):  
Beschasnyi S.P. ◽  
Lysenko E.M. ◽  
Hasiuk O.M. ◽  
Erlish О.О.
Keyword(s):  
Carbon Monoxide ◽  
The Body ◽  
Gas Liquid Chromatography ◽  
Older Individuals ◽  
Chromatography Method ◽  
Co Intoxication ◽  
Blood And Urine Samples ◽  
Liquid Chromatography Method ◽  
High Level ◽  
The Impact

Carbon monoxide is a toxic gas that is colourless, odourless, and has the potential to cause momentaryhypoxia by bonding with heme-inspired proteins. Because of these properties, it causes the highest number of toxications. Due to its properties, this gas causes damage to the nervous and cardiovascular system. The development of anoxia is associated with the impact on the system of oxidative phosphorylation in mitochondria and the development of oxidative stress in the body. The body produces a small amount of carbon monoxide as a result of erythrocyte breakdown. Picomolar concentrations of carbon monoxide even have anti-inflammatory, antiapoptotic,cytoprotective and antiproliferative properties. Kidney is one of the first organs,that responds to the occurrence of hypoxia, are responsible for the removal of products of metabolism and toxicants, including ethanol. For the study, the blood and urine samples were taken from patients with acute intoxication. The amount of methemoglobin in the blood was determined by spectrophotometric method. The concentration of ethanol in blood and urine was measured by gas-liquid chromatography method. The correlation analysis showed that carbon monoxide affects the rate of excretion of ethanol from the body. Among individuals under 40 years of age, there was a correlation between the level of carbon monoxide and the amount of ethanol in the blood. Among older adults this correlation was not established. A direct correlation with the level of this gas in the blood and the level of ethanol in the urine among people under 40 years of age was found. Among older individuals, the opposite was observed –a high level of methemoglobin was responsible for the decreased level of ethanol. There were no correlations between methemoglobin level and age. Comparison of the studied indices did not show any sexual differences in ethanol excretion, but there were age specific features: ethanol excretion under the influence of carbon monoxide among people under 40 years old was more accelerated.Key words:hypoxia, CO intoxication, blood, methemoglobin, kidneys. Монооксид карбону являє собою токсичний газ, який не має кольору,без запаху та здатен спричиняти миттєву гіпоксію шляхом зв’язування з гем-вмісними білками. Через такі властивості він спричиняє найбільшу кількість отруєнь. Цей газ,завдяки своїм властивостям,спричиняє ураження нервової та серцево-судинної системи. Розвиток аноксії пов’язаний із впливом на систему окисного фосфорилювання у мітохондріях та розвиткомоксидативного стресу. В організмі продукується невелика кількість ендогенного монооксиду карбону внаслідок розпаду еритроцитів. Пікомолярні концентрації монооксиду карбону навіть володіють протизапальними, антиапоптичними, цитопротекторними та антипроліферативними властивостями. Нирки є одним із перших органів, який реагує на розвитокгіпоксії, вони відповідають за видалення продуктів метаболізму й токсикантів, зокрема етанолу.Зміни у функціонуванні нирок відображаються на загальному стані організму.Для дослідження отримували зразки крові та сечі від осіб із гострою інтоксикацією. У крові спектрофотометричним методом визначали вміст метгемоглобіну, який утворювався внаслідок вдихання монооксиду карбону та відповідного потрапляння до кровоносної системи. Методом газово-рідинної хроматографії вимірювали концентрацію етанолу у крові та сечі. Розрахунок кореляційних зв’язків показав, що монооксид карбону впливає на швидкість екскреції етанолу. У осіб до 40 років спостерігалася кореляція між показником рівня метгемоглобінута вмістом етанолу у крові. У осіб старшого віку цього зв’язку не встановлено. Виявлено прямий зв’язок із рівнем цього газу у крові та рівнем етанолу в сечі у осіб до 40 років. У осіб старшого віку спостерігалася зворотня реакція–високий рівень метгемоглобінуобумовлював зниження рівня етанолу. Кореляційні зв’язки між вмістом метгемоглобіну та віком не було виявлено. Порівняння досліджуваних показників не виявило статевих відмінностей у екскреції етанолу, проте виявлено вікові особливості: екскреція етанолу в умовах впливу монооксиду карбону в осіб до 40 років була більш пришвидшена.Таким чином, можна стверджувати, що монооксид карбону обумовлює зміни у функціональній активності нирок.Ключові слова:гіпоксія, інтоксикація СО, кров, метгемоглобін, нирки.

scholarly journals Monitoring the effects of exposure to lead and cadmium in working and living environment through standard biochemical blood parameters and liver endonucleases activity

2011 ◽  
Vol 65 (4) ◽  
pp. 403-409 ◽  
Author(s):  
Ruzica Nikolic ◽  
Jasmina Jovanovic ◽  
Gordana Kocic ◽  
Tatjana Cvetkovic ◽  
Svetlana Stojanovic ◽  
...  
Keyword(s):  
Liver Enzymes ◽  
Harmful Effect ◽  
Toxic Metal ◽  
Combustion Products ◽  
Blood Parameters ◽  
Living Environment ◽  
The Body ◽  
Lead Contamination ◽  
Lead And Cadmium ◽  
High Level

Heavy metals as pollutants in the working and living environment are a serious health and environmental problem because they are toxic, non-biodegradable, accumulate in living systems and have a long half-life in soil. Sources of lead contamination are combustion products in the chemical industry and metallurgy, industrial waste water, landfills, traffic etc. Lead enters into the body via the food chain and drinking water. In the body lead is deposited in the liver, kidneys, brain and mineral tissues. Excretion of lead causes damage to the epithelial cells of certain organs. High level exposure to cadmium is usually the result of environmental pollution by human activities. Exposure to cadmium can lead to acute and chronic tissue damage of various organs, including liver and kidneys in humans and in animals. In this paper we analyzed the effects of lead and cadmium exposure, in working and living environment, on the model system of experimental animals, particularly the activity of certain liver enzymes, acid and alkaline DNase, and standard biochemical blood parameters. The study showed that lead and cadmium significantly affect the protein content, red blood cells, hemoglobin and hematocrit, and the activity of liver enzymes. This harmful effect of this toxic metal can be reduced by the supplements.

scholarly journals Effects of Data-Loggers Implanted for a Full Year in Female Common Eiders

The Condor ◽  
2002 ◽  
Vol 104 (2) ◽  
pp. 448-452 ◽  
Author(s):  
Magella Guillemette ◽  
Anthony J. Woakes ◽  
Annette Flagstad ◽  
Patrick J. Butler
Keyword(s):  
Harmful Effect ◽  
Body Cavity ◽  
The Body ◽  
Control Group ◽  
Somateria Mollissima ◽  
Aerodynamic Properties ◽  
Data Loggers ◽  
Common Eiders ◽  
The Baltic ◽  
The Impact

Abstract Data-loggers can be implanted into the body cavities of birds to monitor their physiology and behavior. This technology opens the potential for year-round monitoring, as long as data-loggers can be retrieved one year later and the implantation does not alter the bird's health or behavior. We tested the impact of carrying data-loggers on reproductive parameters of nine female Common Eiders breeding in the Baltic Sea. We minimized disturbance and maximized return rates of experimental females by implanting data-loggers during the second half of the incubation period and by choosing early breeders, which were presumably high quality individuals. All experimental females came back to the study plot the year following implantation. Using a before-after approach applied to an experimental and a control group, we found no evidence that carrying data-loggers had any harmful effect on laying dates, clutch sizes, or hatching success of experimental females. It appears that data-loggers implanted in the body cavities of female Common Eiders do not interfere with their reproductive activities. Explanations for this result are that data-loggers are small compared to body mass (<1%), and their implantation into the body cavity does not alter the hydrodynamic or aerodynamic properties of these diving birds. Efectos de Medidores Implantados por un Año Completo en Hembras de Somateria mollissima Resumen. Pequeños medidores (i.e., “data-loggers”) pueden ser implantados en las cavidades corporales de las aves para monitorear su fisiología y comportamiento. Esta tecnología abre el potencial para realizar monitoreos a lo largo del año, siempre y cuando los medidores puedan ser recuperados un año más tarde y éstos no afecten la salud o el comportamiento de las aves. Evaluamos el impacto de llevar medidores sobre parámetros reproductivos de nueve hembras de la especie Somateria mollissima que se estaban reproduciendo en el Mar Báltico. Minimizamos el disturbio y maximizamos las tasas de retorno de las hembras experimentales implantando los medidores durante la segunda mitad del período de incubación y escogiendo aquellas que se reprodujeron al comienzo de la estación, que presumiblemente eran individuos de alta calidad. Todas las hembras experimentales regresaron al sitio de estudio al año siguiente de la implantación. Utilizando un método de antes y después aplicado a un grupo experimental y a uno de control, no encontramos evidencia de que llevar medidores tenga algún efecto negativo sobre la fecha de postura, el tamaño de la nidada o el éxito de eclosión de las hembras experimentales. Al parecer, los medidores implantados en las cavidades corporales de las hembras de S. mollissima no interfieren con sus actividades reproductivas. Las explicaciones para este resultado son que los medidores son pequeños en comparación con la masa corporal (<1%), y que su implantación en la cavidad corporal no altera las propiedades hidrodinámicas ni aerodinámicas de estas aves buceadoras.

scholarly journals Opinions on the Contribution of the Bio-Psycho-Physical Component in Military Confrontations Carried Out in Extreme Conditions

2021 ◽  
Vol 27 (2) ◽  
pp. 213-218
Author(s):  
Robert Stănciulescu ◽  
Lucian Tarnu
Keyword(s):  
Training System ◽  
The Body ◽  
Mental Training ◽  
Continuous Training ◽  
Military Organization ◽  
Complex Training ◽  
High Level ◽  
Physical Features ◽  
The Military ◽  
The Impact

Abstract The adaptation of the fighter to the combat situations within the different missions, as well as the need to face any request coming up during the confrontations, imposes an extremely complex training system. Having an essential role in combat, the fighter must acquire qualities both in terms of mental, biological and physical features. Due to the threats that hang over the fighters at any time in this type of conflicts, the emphasis in their training is aimed at training in conditions as close to the existing reality as possible, with a focus on the impact that the battlefield has on his psyche and physique, so that at the same time he can adapt his systems of action of the body to the requirements of any nature imposed by each mission. The paper highlights that the process of training this type of fighters includes, among the training pillars, physical and mental training as a support for exceptional training and effective exercise of roles and missions entrusted to the military organization in peacetime, in situations of crisis and especially at war. In the economics of the formative process, physical and mental training represents the essence of a high level of acquiring the qualities specific to the successful conduct of combat, a fact for which their development has been and will always remain a priority objective throughout the continuous training of fighters.

scholarly journals THE PECULIARITIES OF THE BODY’S EXTERNAL STRUCTURE AND INDICATORS OF CENTRAL HEMODYNAMICS OF VOLLEYBALL PLAYERS OF DIFFERENT POSITIONS

2020 ◽  
Vol 73 (5) ◽  
pp. 920-924
Author(s):  
Larisa A. Sarafinjuk ◽  
Olga P. Khapitska ◽  
Larysa Ya. Fedoniuk ◽  
Lyudmila V. Fomina ◽  
Daria A. Merkulova ◽  
...  
Keyword(s):  
Peripheral Resistance ◽  
The Body ◽  
Control Group ◽  
Central Hemodynamics ◽  
Anthropometric Parameters ◽  
External Structure ◽  
Impact Index ◽  
Volleyball Players ◽  
High Level ◽  
The Impact

The aim was to determine the main differences in the external structure of the body and the of central hemodynamics parameters in of high-level sports skills volleyball players of the juvenile age with the role of libero, hitters and setters. Materials and methods: 116 volleyball players of high level athletic skill of the youth age from 16 to 20 years old. The control group included 140 practically healthy girls who were not engaged in sports of the corresponding age. Anthropometric investigation was performed according to Bunak’s V.V. and Martirosov’s E.G. method, rheographic – according to the method of Ronkin M.A. and Ivanov L.B. The reliability of the difference between independent quantitative values was determined using Mann–Whitney U-test. Results: It was established that volleyball players have significantly higher total, longitudinal, circumferential dimensions of the body, width of distal epiphyses, transverse diameters of the chest and pelvis in comparison with girls, who are not involved in sport. According to the most parameters of the body external structure the hitters are predominate than setters and libero. In hitters and setters, most anthropo-somatotypological parameters are larger than in nonathletes. The stroke and minute volumes, the impact index, the volume velocity of the blood and the capacity of the left ventricle in volleyball players are significantly higher. Specific peripheral resistance is significantly lower than that of girls who are not involved in sports. Between the volleyball players of different positions in the value of the central hemodynamics parameters, there were no significant differences, except for the impact index, which is significantly higher in libero than in the hitters. Conclusions: The external structure of the body, anthropometric parameters and indicators of central hemodynamics depend of volleyball player’s position and have some peculiarities.

scholarly journals Impact of alcohol consumption on the health of pregnant women and their children – a review of studies

2021 ◽  
Vol 17 (3) ◽  
pp. 203-210
Author(s):  
Marta Dulęba ◽  
◽  
Małgorzata Chądzyńska ◽  
Barbara Kozakiewicz ◽  
◽  
...  
Keyword(s):  
Alcohol Consumption ◽  
Pregnant Women ◽  
Harmful Effect ◽  
The Body ◽  
Review Of Literature ◽  
Drinking Alcohol ◽  
Alcohol Content ◽  
Information Campaigns ◽  
The 1960S ◽  
Harmful Effects

Introduction: Alcohol is one of the strongest teratogens. Since the 1960s, information campaigns have been conducted to address its harmful effect and promote quitting drinking, especially by pregnant women. The aim of this paper includes a review of literature concerning research on alcohol use by pregnant women and learning about their knowledge of the detrimental effects of ethanol on the health of themselves and their unborn children. This paper shall also assess social campaigns devoted to informing this group of women about the harmful effects of alcohol consumption. Description of state of knowledge: The review explicitly confirmed data on the harmful effect of alcohol on the formation of morphological and behavioural changes stigmatising children, which are not always visible from birth, and often take the form characteristic of foetal alcohol syndrome only in schoolchildren. The results of molecular and psychological tests have raised the question as to whether the acceptable limits for blood alcohol content in pregnant women should be established. The toxic effects of alcohol and its metabolites depend not only on the amount consumed, but also on the body condition, style of drinking, and age. Summary: Studies covering 11 European countries have shown that drinking alcohol during pregnancy is more and more common, especially in better-educated women with higher earnings and from larger cities. Therefore, information campaigns that stress the harmfulness of the so-called risky drinking by pregnant women should be targeted primarily at this group.

scholarly journals ANIMASI PANDUAN PEMBUATAN SERTA PENGGUNAAN HAND SANITIZER DAN DISINFEKTAN YANG AMAN DAN EFEKTIF DI MASA PANDEMI COVID-19

Sarwahita ◽  
2021 ◽  
Vol 18 (01) ◽  
pp. 36-49
Author(s):  
Annisa Auliya ◽  
Aulia Siti Pathoni ◽  
Devi Aliefiyardi ◽  
Aulia Widowati ◽  
Nita Aresanti ◽  
...  
Keyword(s):  
Chemical Substance ◽  
The Body ◽  
Questionnaire Data ◽  
Active Ingredients ◽  
Hand Sanitizer ◽  
The World ◽  
The Media ◽  
The Impact ◽  
Harmful Effects ◽  
At Home

Abstract The COVID-19 pandemic occurred in many parts of the world has disrupted many aspects of life. One precaution to protect ourselves from this virus is cleaning our hands by using hand sanitizers and cleaning surfaces that are frequntly touched by using disinfectants. Therefore, there is tremendous need of this chemical substance in this pandemic era. This fact enforces people to make this chemical at home.. This homemade manufacture and use of sanitizers and disinfectants must be in accordance with the regulations, so that they don't cause any harmful effects for the body. This program is carried out with the aim of providing education to the community, especially residents of Duren Sawit Village. The media used in this program are Instagram and YouTube, and the materials were delivered in form of videos. Videos were uploaded to Instagram and YouTube on 2 – 23 June 2020. After that, a questionnaire was filled on 23 June – 1 July 2020. From the questionnaire data, it can be shown that the respondents have benefited from the video generally. The benefits obtained by the community were dealing with the functions and active ingredients contained in hand sanitizers and disinfectants; method of producing hand sanitizers and disinfectants; the importance of providing hand sanitizers and disinfectants at home; caution in using hand sanitizers and disinfectants; as well as the impact if there is a misuse of hand sanitizer or disinfectant. Through this program, it is expected that the community will be able to make and use sanitizers and disinfectants safely and effectively to achieve a healthier Indonesia. Abstrak Pandemi COVID-19 yang terjadi di berbagai belahan dunia mengakibatkan banyak aspek kehidupan terganggu. Salah satu tindakan pencegahan untuk melindungi diri kita dari virus ini adalah dengan membersihkan tangan menggunakan hand sanitizer dan membersihkan benda-benda yang sering tersentuh dengan disinfektan. Oleh karena itu, di masa pandemi kebutuhan bahan kimia tersebut meningkat tajam dan mendorong masyarakat untuk membuatnya sendiri di rumah. Pembuatan mandiri serta penggunaan hand sanitizer dan disinfektan ini harus sesuai aturan sehingga tidak menimbulkan efek yang tidak baik bagi tubuh. Program ini dilakukan dengan tujuan memberi edukasi kepada masyarakat, khususnya warga Kelurahan Duren Sawit, Kota Jakarta Timur. Materi disampaikan dengan video animasi melalui media Instagram dan YouTube. Video diunggah ke Instagram dan YouTube pada 2 – 23 Juni 2020. Setelah itu, dilakukan pengisian angket pada 23 Juni – 1 Juli 2020. Dari hasil angket, secara umum responden menyatakan sudah mendapatkan manfaat dari video yang dibagikan. Manfaat yang diperoleh masyarakat berupa fungsi, dan bahan aktif yang terkandung dalam hand sanitizer dan disinfektan; cara membuat hand sanitizer dan disinfektan; pentingnya penyediaan hand sanitizer dan disinfektan di rumah; beberapa peringatan dalam menggunakan hand sanitizer dan disinfektan; serta dampak yang ditimbulkan jika ada kesalahan dalam menggunakan hand sanitizer atau disinfektan. Melalui program ini diharapkan masyarakat mampu membuat serta menggunakan sanitizer dan disinfektan dengan aman dan efektif untuk mencapai Indonesia yang lebih sehat.

HALLOYSITE NANOTUBES ARE A NEW EFFECTIVE TOOL TO COMBAT MYCOTOXICOSIS

2020 ◽  
Vol 15 (4) ◽  
pp. 561-571
Author(s):  
E.Y. Tarasova ◽  
◽  
E.Y. Semenov ◽  
L.E. Matrosova ◽  
◽  
...  
Keyword(s):  
Harmful Effect ◽  
Halloysite Nanotubes ◽  
The Body ◽  
Farm Animals ◽  
Economic Losses ◽  
International Agency ◽  
Binding Agents ◽  
Harmful Effects ◽  
Toxic Load

Mycotoxins are secondary metabolites produced by molds, mainly from the genera Fusarium, Aspergillus, Penicillium. They can contaminate food and have a harmful effect on human health. Most mycotoxins are thermostable, that is, they can persist during processing and cooking. The presence of mycotoxins in food can cause harmful effects, ranging from acute intoxication and ending with pathologies of chronic exposure (such as carcinogenic, mutagenic, teratogenic) in humans and animals. T-2 toxin is the strongest immunosuppressant, which in turn predisposes to the development of infectious diseases and leads to a decrease in productivity, which entails significant economic losses. The International Agency for Research on Cancer classifies zearalenone as a class 2A carcinogen. Therefore, the inclusion of binding agents, or enterosorbents, in the diet is given considerable attention as a strategy to reduce the bioavailability of mycotoxins and the effects of contaminated feed and food. A study of the adsorption capacity of bentonites of the Biklyansk and Tarn-Var deposits, the zeolite of the Main deposit, and in vitro halloysite nanotubes with respect to T-2 toxin and zearalenone showed that it is halloysite that has the best sorption rates (85.8 and 86.0%) and, in the future, may be used to combat mycotoxicosis of animals, birds, and, in the food chain, humans. With an increase in the pH of the medium from 2 to 8, the desorption of mycotoxins with the lowest rates for halloysite at 0.7 ± 0.04% for zearalenone and 3.5 ± 0.1% for T-2 toxin was observed in all studied adsorbents. The data obtained make halloysite nanotubes very interesting for further studies of other mycotoxins and their combinations, as well as its comprehensive study as a means of reducing the toxic load on the body of farm animals and birds.

scholarly journals Sleep Deficiency and Sleep Health Problems in Chinese Adolescents

2012 ◽  
Vol 6 ◽  
pp. CMPed.S8407 ◽  
Author(s):  
Victor Kang ◽  
Jesus Shao ◽  
Kai Zhang ◽  
Martha Mulvey ◽  
Xue Ming ◽  
...  
Keyword(s):  
School Performance ◽  
Health Problems ◽  
Chinese Adolescents ◽  
Poor Sleep ◽  
Sleep Health ◽  
Sleep Deficiency ◽  
Sleep Length ◽  
High Level ◽  
The Impact ◽  
Inadequate Sleep

A survey of sleep schedules, sleep health, and the impact on school performance was conducted in 585 adolescents in a high school in China. A high level of early and circadian-disadvantaged sleep/wake schedules during weekdays was observed. Significantly shorter sleep duration on weekdays was reported ( P < 0.0001). Older teenagers slept significantly less than the younger teenagers ( P < 0.0001). Complaints of inadequate sleep and sleepiness during weekdays were prevalent. Night awakenings were reported in 32.2% of students. Students with a sleep length of less than 7 hours, complaint of inadequate sleep, or excessive daytime sleepiness during weekdays were more likely to report an adverse effect of poor sleep on performance. The present observations are qualitatively similar to those reported in our study in American adolescents, particularly with respect to Chinese adolescents exhibiting a similar sleep deficiency on weekdays. We concluded that sleep deficiency and sleep health problems were prevalent in the participating adolescents in China, and were perceived to adversely affect school performance.

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