Reference curves for a fitness battery developed for children ages 5-12 years in England

Purpose: Reference curves have already been created for a variety of different physical testing batteries across a number of countries. Due to results differing between countries for the same sex and age, it is important that reference curves are created specific for each country. Therefore, the aim of this study was to provide reference curves for five different fitness tests that assess the core components of health related fitness within children in England. Method: Following institutional ethics approval, parental informed consent and child assent was obtained for a total of 39,199 children aged between 5 and 12 years completed tests for explosive power, agility, hand eye coordination, lower body strength and upper body strength. To calculate reference values Generalised Additive Models for Location, Scale and Shape (GAMLSS) were used. Results: Reference curves and centiles show differences in performance levels of the fitness tests between sex and age groups. These reference curves and centiles provide age and sex comparisons to enable progress monitoring of children's physical fitness competence within England and comparisons to other countries. Conclusion: Girls are outperformed from a young age group and both upper and lower body strength decreases are seen at ages nine and ten. In physical activity and health related fitness interventions, both girls and boys in Key stage two should be targeted to maintain progression and lessen the gender divide

Historical perspective of iron in ancient India

Iron is an important metal which has influenced the march of civilization over atleast 5000 years and it has been in the service of man from the dawn of time. The ancient scriptures and legends have extensive references about the use of iron. The archaeological evidences show that iron was being made all over India and there was no written records of the process of manufacturing iron. The technology has been handed over from one person to another within a limited group. Unfortunately this art phased out with the development of new technology during 19-20 century. The paper discusses the various sources of existence of iron, its utilization and importance right from pre-Rig Vedic period upto the first half of 20 century

A Comprehensive pollution control system for the mitigation of fine particulates of lead and Sox gases from secondary lead smelters

A large number of small scale units making use of scrap, dross and junk automobile storage batteries do not adopt appropriate pollution control measures mostly due to their financial constraints. They emit fine par¬ticulates of lead and SO, gases to the surrounding atmosphere which are injurious to the health of people residing in the neighbouring localities. In view of this, National Metallurgical Laboratory, Jamshedpur has de¬veloped a comprehensive pollution control system for control of fine par¬ticulates of lead and SOX gases from secondary lead smelters

Utilisation of waste battery scrap

The waste battery scrap can be metallurgically treated to separate lead from various impurities such as sulphates, oxides and other metals in scrap. An attempt has been made to smelt the treated battery scrap for recovery of lead as well as for SO= pollution abatement

Magnetite ore of nagaland—its mineralogy and reduction kinetics

The magnetite body near Pokphur in the Kiphere district of Nagaland is geologically quite different and a rare type of occurrence associated with ophiolite. Mineralogical studies reveal the presence of magnetite, chromite and hematite followed by goethite, ilmentite, trevorite, pentlandite and millerrite. Magnetite grains are weathered to various degrees and sometimes fractured. Reduction studies indicate that in gas-solid system considerable reduction of magnetite ore takes place in initial 60 minutes, further the rate of reduction becomes slow. In gas-solid system the percentage reduction of magnetite ore is considerably more compared to solid-solid systems

Iron making in ancient India - a critical assessment

It is a well known fact, that Indian craftsman produced quality iron products much earlier than the developed countries, making use of local reserves of iron ore. Iron produced in ancient India was mostly wrought iron. The metal was obtained in the form of a pasty mass and then shaped under hammer. Today, when India is producing several million tons of iron, primitive iron making is still exists in some parts of India. The primitive iron making furnaces declined in numbers gradually from about 500 in the beginning of 20'h century to about 150 by the middle of the century. Their present number is not known. Such furnaces are in operation deep into the forests and the tribal areas of India. The paper discusses briefly the history of iron making along with the critical assessment of the ancient processes. Some of the important measures absolutely. essential to upgrade the processes have also been discussed. Several pertinent modifications have been proposed in the design of these furnaces to make them more energy efficient and economically viable 'for tribal and rural populace

Parenting and toddler self‐regulation in low‐income families: What does sleep have to do with it?

Toddlerhood is a sensitive period in the development of self‐regulation, a set of adaptive skills that are fundamental to mental health and partly shaped by parenting. Healthy sleep is known to be critical for self‐regulation; yet, the degree to which child sleep alters interactive child–parent processes remains understudied. This study examines associations between observed parenting and toddler self‐regulation, with toddler sleep as a moderator of this association. Toddlers in low‐income families (N = 171) and their mothers were videotaped during free play and a self‐regulation challenge task; videos were coded for mothers’ behavior and affect (free play) and toddlers’ self‐regulation (challenge task). Mothers reported their child’s nighttime sleep duration via questionnaire. Results revealed significant Sleep × Maternal Negative Affect and Sleep × Maternal Negative Control interactions. Children who did not experience negative parenting had good self‐regulation regardless of their nighttime sleep duration. For children who did experience negative parenting, self‐regulation was intact among those who obtained more nighttime sleep, but significantly poorer among children who were getting less nighttime sleep. Thus, among children who were reported to obtain less nighttime sleep, there were more robust associations between negative parenting and poorer self‐regulation than among toddlers who were reported to obtain more sleep.RESUMENLos primeros años de la niñez son un período sensible en el desarrollo de la auto‐regulación, un grupo de habilidades adaptables que son fundamentales para la salud mental y a las que en parte les da forma la crianza. Es sabido que el dormir bien es esencial para la auto‐regulación y, aun así, el nivel al que el sueño del niño altera los procesos interactivos entre progenitor y niño permanece poco estudiado. Este estudio examina las asociaciones entre la crianza observada y la auto‐regulación del niño pequeño, tomando como moderador de tal asociación el proceso de dormir del niño pequeño. Se grabó en video a niños pequeños de familias de bajos ingresos (N=171) y sus madres durante una sesión de juego libre y una tarea de auto‐regulación que suponía un reto; los videos fueron codificados en cuanto al comportamiento y afecto de las madres (juego libre) y la auto‐regulación de los niños pequeños (tarea que suponía reto). Las madres reportaron acerca del sueño nocturno de sus niños por medio de un cuestionario. Los resultados revelaron interacciones significativas en cuanto al dormir y el negativo afecto materno, así como el dormir y el negativo control materno. Los niños que no experimentaron una crianza negativa tenían una buena auto‐regulación independientemente de la duración de su sueño nocturno. En el caso de los niños que experimentaron una crianza negativa, la auto‐regulación quedó intacta en aquellos que lograban más tiempo nocturno de dormir, pero fue significativamente más pobre en los niños que tenían menos tiempo de sueño nocturno. Por tanto, en el caso de los niños indicados en el reporte con menos tiempo de dormir nocturno, se dieron asociaciones más robustas entre la crianza negativa y una más pobre auto‐regulación que entre los niños pequeños indicados en el reporte con más tiempo de dormir.RÉSUMÉLa petite enfance est une période sensible dans le développement de l’auto‐régulation, un ensemble de compétences qui sont fondamentales pour la santé mentale et en partie formées par le parentage. L’on sait qu’un sommeil sain est critique pour l’auto‐régulation et pourtant la mesure dans laquelle le sommeil de l’enfant altère les processus interactifs enfant‐parent demeure peu étudiée. Cette étude examine les liens entre le parentage observé et l’auto‐régulation du petit enfant, le sommeil de l’enfant ayant un effet modérateur dans ce lien. Des jeunes enfants de familles issues de milieux défavorisés (N=171) et leurs mères ont été filmés durant un jeu libre et un exercice de défi d’auto‐régulation. Les vidéos ont été codées pour le comportement des mères et l’affect (jeu libre) et l’auto‐régulation des jeunes enfants (exercice de défi). Les mères ont fait état de la durée de sommeil nocturne de leur enfant au moyen d’un questionnaire. Les résultats ont révélé que : sommeil significatif x l’affect négatif maternel et le sommeil x négatif maternel contrôle les interactions. Les enfants qui n’avaient pas fait l’expérience d’un parentage négatif avaient une bonne auto‐régulation quelle qu’ait été la durée du sommeil nocturne. Pour les enfants ayant fait l’expérience d’une parentage négatif, l’auto‐régulation était intacte chez ceux ayant plus dormi, mais bien moindre chez les enfants qui avaient moins dormi. Donc, chez les enfants ayant moins de sommeil nocturne les liens bien plus robustes ont été découverts entre le parentage négatif et une moindre auto‐régulation que chez les petits enfants dormant plus durant la nuit.ZUSAMMENFASSUNGDas Kleinkindalter ist ein sensibler Zeitraum für die Entwicklung der Selbstregulation – einer Reihe von Anpassungsfähigkeiten, die für die psychische Gesundheit grundlegend sind und teilweise durch Erziehung geprägt werden. Gesunder Schlaf ist bekanntlich entscheidend für die Selbstregulation, aber das Ausmaß, in dem der Kinderschlaf interaktive Prozesse zwischen Kind und Eltern verändert, ist bisher nur unzureichend erforscht wurden. Diese Studie untersucht Zusammenhänge zwischen beobachtetem Erziehungsverhalten und der Selbstregulation von Kleinkindern, wobei der Schlaf der Kleinkinder als Moderator dieser Assoziation fungiert. Kleinkinder aus einkommensschwachen Familien (N=171) und ihre Mütter wurden während des freien Spiels und einer herausfordernden Aufgabe zur Selbstregulation gefilmt; die Videos wurden für das Verhalten und die Affekte der Mütter (freies Spiel) und die Selbstregulation der Kleinkinder (herausfordernde Aufgabe) kodiert. Die Mütter berichteten per Fragebogen über die nächtliche Schlafdauer ihres Kindes. Die Ergebnisse zeigten signifikante Interaktionen für Schlaf und mütterlichen negativen Affekt sowie für Schlaf und mütterliche negative Kontrollinteraktionen. Kinder, die keine negative Erziehung erlebten, hatten eine gute Selbstregulation, unabhängig von ihrer nächtlichen Schlafdauer. Bei Kindern, die eine negative Erziehung erfuhren, war die Selbstregulation bei denen, die mehr Nachtschlaf erhielten, intakt und bei Kindern, die weniger Nachtschlaf erhielten, jedoch deutlich schlechter. So gab es bei Kindern, von denen berichtet wurde, dass sie weniger Nachtschlaf erhielten, robustere Assoziationen zwischen negativer Erziehung und schlechterer Selbstregulation als bei Kleinkindern, von denen berichtet wurde, dass sie mehr Schlaf erhielten.抄録低収入家庭における子育てと幼児の自己調整力:睡眠が関与するものとは何か？幼児期は、自己調整力、つまりメンタルヘルスの基礎であり、ある程度までは子育てによって形成される、一連の適応スキルの発達が影響を受けやすい時期である。健康的な睡眠は自己調整力には不可欠のものとして知られているが、子どもの睡眠が子どもと親の相互作用の過程をどの程度まで改めるかについては、いまもなお研究課題のままである。本研究は、観察によって得られた子育てと幼児の自己調整力の関連性について幼児の睡眠を仲介として検討することである。低所得家庭 (N=171) で生活している幼児と母親が自由遊びと自己調整のチャレンジタスクに取り組む間中ビデオ録画した。ビデオデータは母親の行動と感情(自由遊び)と幼児の自己調整力(チャレンジタスク)としてコード化された。子どもの夜間の睡眠時間は母親からの質問紙を通して報告された。その結果、睡眠と母親の否定的感情の間、そして睡眠と母親の否定的コントロールの間には著しい相互関連性が認められた。否定的育児を経験していない子どもは、夜間の睡眠時間に関わらず、よい自己調整力を持っていた。否定的育児を経験した子どもでは、自己調整力はより長い夜間睡眠をとっている子どもにおいては保たれていたが、より短い睡眠時間しかとっていない子どもにおいては著しく低かった。このようにより短い睡眠時間しかとっていないと報告された子どもにおいては、より長い睡眠をとっている幼児より、否定的育児とより低い自己調整力の間により確かな関連性が示された。摘要低收入家庭的育兒和幼兒自我調節:與睡眠有什麼關係？幼兒期是自我調節發展的一個敏感時期， 這是一套適應性技能， 是心理健康的基礎， 部分由養育方式塑造。眾所周知， 健康睡眠對於自我調節至關重要， 然而， 兒童睡眠如何改變兒童 ‐ 父母互動仍未得到充分研究。本研究探討觀察到的養育方式與幼兒自我調節的關聯， 及幼兒睡眠作為這種關聯的調節變數。低收入家庭的幼兒 （N = 171） 和母親在自由遊戲和自我調節挑戰任務中被錄像; 視頻被編碼為母親的行為和情感 （自由遊戲） 和幼兒的自我調節 （挑戰任務）。母親通過問卷報告孩子的夜間睡眠時間。結果顯示顯著的睡眠x母體負面情感和睡眠 x 母體負面控制相互作用。沒有經歷負面養育的孩子， 無論夜間睡眠時間長短， 都有良好的自我調節能力。對於那些經歷過負面養育的孩子， 在夜間睡眠較多的人中， 自我調節是完整的， 但在夜間睡眠較少的孩子中， 自我調節顯著較差。因此， 在夜間睡眠較少的兒童中， 負面育兒和較差的自我調節的關聯性強於較多睡眠的幼兒。ملخصالرعاية الوالدية والتنظيم الذاتي للطفل في الأسر ذات الدخل المنخفض: ما علاقة النوم بذلك ؟الطفولة هي فتره حساسة في تطوير التنظيم الذاتي ، والذي يمثل مجموعه من المهارات التكيفيه التي هي أساسيه للصحة النفسية وتتشكل جزئيا عن طريق الأبوه والأمومه. ومن المعروف ان النوم الصحي أمر بالغ الاهميه للتنظيم الذاتي ، ومع ذلك ، فان الدرجة التي يغير بها نوم الطفل في العمليات التفاعلية التي يقوم بها الطفل مع الوالدين لا تزال غير خاضعة للدراسة الكافية. تتناول هذه الدراسة العلاقات بين الرعاية الوالدية الملحوظة والتنظيم الذاتي للطفل الصغير ، حيث نوم الطفل يمثل المتغير الوسيط في هذه العلاقة. اشترك في الدراسة مجموعة من الأطفال الصغار في الأسر ذات الدخل المنخفض (العدد = 171) وأمهاتهم وتم تصويرهم بالفيديو اثناء اللعب الحر مع تكليفهم بمهمة تحدي التنظيم الذاتي ؛ تم ترميز تسجيلات الفيديو لسلوك الأمهات وعاطفتهم في (اللعب الحر) والتنظيم الذاتي للأطفال الصغار في (مهمة التحدي). وأبلغت الأمهات عن مده النوم الليلي لأطفالهن عن طريق الاستبيان. أظهرت النتائج تفاعلات ذات دلالة إحصائية بين النوم والعاطفة السلبية عند الأمهات وبين النوم والسيطرة السلبية للأمهات . الأطفال الذين لا يعانون من الابوه والامومه السلبية كان لديهم قدرات جيدة على التنظيم الذاتي بغض النظر عن مده النوم ليلا. بالنسبة للأطفال الذين يعانون من الابوه والامومه السلبية ، كان التنظيم الذاتي سليما بين أولئك الذين حصلوا علي المزيد من النوم ليلا ، ولكن أضعف بكثير بين الأطفال الذين كانوا يحصلون علي اقل النوم ليلا. وبالتالي ، فانه من بين الأطفال الذين ابلغ عن حصولهم علي قسط اقل من النوم الليلي ، كانت هناك رابطات اقوي بين الرعاية الوالدية السلبية والتنظيم الذاتي الأقل منها بين الصغار الذين أفيد بأنهم يحصلون علي المزيد من النوم.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/150525/1/imhj21783.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/150525/2/imhj21783_am.pd

The Daemo crowdsourcing marketplace

The success of crowdsourcing markets is dependent on a strong foundation of trust between workers and requesters. In current marketplaces, workers and requesters are often unable to trust each other’s quality, and their mental models of tasks are misaligned due to ambiguous instructions or confusing edge cases. This breakdown of trust typically arises from (1) flawed reputation systems which do not accurately reflect worker and requester quality, and from (2) poorly designed tasks. In this demo, we present how Boomerang and Prototype Tasks, the fundamental building blocks of the Daemo crowdsourcing marketplace, help restore trust between workers and requesters. Daemo’s Boomerang reputation system incentivizes alignment between opinion and ratings by determining the likelihood that workers and requesters will work together in the future based on how they rate each other. Daemo’s Prototype tasks require that new tasks go through a feedback iteration phase with a small number of workers so that requesters can revise their instructions and task designs before launch

Prototype tasks: Improving crowdsourcing results through rapid, iterative task design

Low-quality results have been a long-standing problem on microtask crowdsourcing platforms, driving away requesters and justifying low wages for workers. To date, workers have been blamed for low-quality results: they are said to make as little effort as possible, do not pay attention to detail, and lack expertise. In this paper, we hypothesize that requesters may also be responsible for low-quality work: they launch unclear task designs that confuse even earnest workers, under-specify edge cases, and neglect to include examples. We introduce prototype tasks, a crowdsourcing strategy requiring all new task designs to launch a small number of sample tasks. Workers attempt these tasks and leave feedback, enabling the requester to iterate on the design before publishing it. We report a field experiment in which tasks that underwent prototype task iteration produced higher-quality work results than the original task designs. With this research, we suggest that a simple and rapid iteration cycle can improve crowd work, and we provide empirical evidence that requester “quality” directly impacts result quality