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ACM ICPC, December in Dhaka

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Shamsuddin:
True,Thank you for uploading this kind of massage !

tamim_saif:
Published: Wednesday, November 28, 2012 - 23:01 in Mathematics & Economics

The latest effort to decipher the unique aroma signature of the durian -- revered as the "king of fruits" in southeast Asia but reviled elsewhere as the world's foulest smelling food -- has uncovered several new substances that contribute to the fragrance. The research appears in ACS' Journal of Agricultural and Food Chemistry. Martin Steinhaus and colleagues explain that durian, available in Asian food shops in the United States and elsewhere, has a creamy yellowish flesh that can be eaten fresh or used in cakes, ice cream and other foods. Some people relish the durian's smell. Others, however, regard it as nauseating, like rotten onions. Past research identified almost 200 volatile substances in durian. Lacking, however, was information on which of those make a contribution to the characteristic durian smell. The authors set out to identify the big chemical players in the durian's odor signature.

In doing so, they pinpointed 41 highly odor-active compounds, 24 of which scientists had not identified in durian before. Among the most prominent were substances associated with fruity, sweet, sulfurous and oniony smells. The oniony smelling odorants belonged to a compound class that had rarely been found in food before. Four of the newly discovered chemical compounds were previously unknown to science.

Source: American Chemical Society

Md. Khairul Bashar:
‘স্কাই স্মার্টপেন’ নামে ক্ষুদ্র কম্পিউটারযুক্ত বিশেষ এক ধরনের কলম তৈরি করেছে যুক্তরাষ্ট্রের ডিজিটাল শিক্ষা উপকরণ নির্মাতা প্রতিষ্ঠান লাইভস্ক্রাইব। এ কলমের সঙ্গে যুক্ত মেমোরি কার্ডে প্রয়োজনীয় নোট সংরক্ষণ করে রাখা সম্ভব।

এক প্রতিবেদনে নিউ ইয়র্ক টাইমস জানিয়েছে, স্কাই স্মার্টপেনের ভেতরে যে ক্ষুদ্র কম্পিউটার যুক্ত রয়েছে তা মাইক্রোডট নামে বিশেষ ধরনের কাগজে লেখার সময় স্বয়ংক্রিয়ভাবে মেমোরি কার্ডে তথ্য সংরক্ষণ করে। স্কাই স্মার্টপেনে নোট লেখার সময় তা ওয়াই-ফাই বা তারবিহীন পদ্ধতিতে ডিজিটাল আর্কাইভ সার্ভিস এভারনোটেও সংরক্ষিত হতে থাকে।
কলমটিতে সর্বোচ্চ ৮ গিগাবাইট পর্যন্ত তথ্য সংরক্ষণ করার সুবিধা রয়েছে। পাশাপাশি এ কলমটি ব্যবহার করে ক্লাউড সেবা এভারনোটে ৫০০ গিগাবাইট তথ্য রাখার সুবিধা পাওয়া যাবে। একবার ক্লাউডে তথ্য সংরক্ষণ করা হলে পরবর্তীতে সেখান থেকে যেকোনো কম্পিউটার, আইওএস নির্ভর পণ্য ও অ্যান্ড্রয়েডনির্ভর স্মার্টফোনে অডিও শোনা বা নোট পড়া যাবে। লেখার পাশাপাশি এ কলমটি ব্যবহার করে অডিও শোনার ব্যবস্থাও রয়েছে। নির্মাতা প্রতিষ্ঠানের দাবি, শ্রেণীকক্ষ বা অনুষ্ঠানে এ কলম কাজে লাগানো যাবে। কলমটির সঙ্গে রয়েছে অতিরিক্ত দুটি কালির কার্টিজ, দুটি ক্যাপ, নোট লেখার জন্য মাইক্রোডট কাগজের নোটবুক ও কলমটি চার্জ দেওয়ার জন্য ইউএসবি কেবল। কলমটি বোতামের পরিবর্তে টাচ প্রযুক্তি নির্ভর।

৪ গিগাবাইট মডেলের স্কাই স্মার্টপেনের দাম ২০০ ডলার। অনলাইনে লাইভস্ক্রাইবের ওয়েবসাইট, আমাজন, বেস্ট বাই থেকে এ কলমটি কেনার সুবিধা রয়েছে।প্রযুক্তি বিশ্লেষকেরা জানিয়েছেন, কলমটির ব্যবহারে ট্যাবলেট ও কাগজের মধ্যকার ব্যবধান দূর হবে। নোটবুকে নোট লিখলে তা সরাসরি ট্যাবলেটে চলে যাবে বলে বাড়তি পরিশ্রম করতে হবে না।


Source: http://www.prothom-alo.com/detail/date/2012-11-21/news/307443

tamim_saif:
This shows the SynergyNet classroom. (Credit: Durham University)
ScienceDaily (Nov. 2012) — Researchers designing and testing the 'classroom of the future' have found that multi-touch, multi-user desks can boost skills in mathematics.

New results from a 3-year project working with over 400 pupils, mostly 8-10 year olds, show that collaborative learning increases both fluency and flexibility in maths. It also shows that using an interactive 'smart' desk can have benefits over doing mathematics on paper.

Using multi-touch desks in the new classroom, the children were able to work together in new ways to solve and answer questions and problems using inventive solutions. Seeing what your friends are doing, and being able to fully participate in group activities, offers new ways of working in class, the researchers say.

The 'Star Trek classroom' could also help learning and teaching in other subjects.

The findings published in the journal Learning and Instruction, show that children who use a collaborative maths activity in the SynergyNet classroom improve in both mathematical flexibility and fluency, while children working on traditional paper-based activities only improve in flexibility.

During the project, the team found that 45% of students who used NumberNet increased in the number of unique mathematical expressions they created after using NumberNet, compared to 16% of students in the traditional paper-based activity.

Lead researcher, Professor Liz Burd, School of Education, said: "Our aim was to encourage far higher levels of active student engagement, where knowledge is obtained by sharing, problem-solving and creating, rather than by passive listening. This classroom enables both active engagement and equal access.

"We found our tables encouraged students to collaborate more effectively. We were delighted to observe groups of students enhancing others' understanding of mathematical concepts. Such collaboration just did not happen when students used paper-based approaches."

The Durham University team designed software and desks that recognize multiple touches on the desktop using vision systems that see infrared light. The project called SynergyNet set out to integrate a fully collaborative system of desks, building it into the fabric and furniture of the classroom. The new desks with a 'multi-touch' surface are the central component, and these are networked and linked to a main smartboard.



In terms of current teaching, the new system means that the 'move-to-use' whiteboard is by-passed and the new desks can be both screen and keyboard. The desks act like multi-touch whiteboards and several students can use any one desk at once.

The technology allows all students to take part as opposed to one individual dominating.

Researcher, Emma Mercier, School of Education, said: "Cooperative learning works very well in the new classroom because the pupils interact and learn in a different way. The children really enjoy doing maths in this way and are always disappointed when you turn the desks off!

"We can achieve fluency in maths through practice, however, boosting a pupil's ability to find a range of solutions to arithmetic questions is harder to teach. This classroom can help teachers to use collaborative learning to improve their pupils' flexibility in maths."

The teacher plays a key role in the classroom and can send tasks to different tables to individuals and groups. The teacher can also send one group's answers on to the next group to work on and add to, or to the board for a class discussion.

A live feed of the desks goes directly to the teacher who can intervene quickly to help an individual while allowing the group work to continue.

Professor Steve Higgins said: "Technology like this has enormous potential for teaching as it can help the teacher to manage and to orchestrate the learning of individuals and groups of learners to ensure they are both challenged and supported so that they can learn effectively."

Such a classroom may be some way off being a regular feature of schools across the world due to the costs in setting it up, and the level of support needed to make it work, however, in just 3 years the project team have noted major improvements in the technology, and a reduction in costs.

The researchers also recognise that task management in the class environment is an issue requiring thought and planning, but the overall potential of the new classroom for improved numeracy, learning, and on-going assessment is very good.

The project has worked with 12 different schools in the North East.

SynergyNet is one of eight technology enhanced learning research projects funded by the Economic and Social Research Council and the Engineering and Physical Sciences Research Council as part of the £12M Teaching and Learning Research Programme into Technology Enhanced Learning.

The project is an inter-disciplinary collaboration at Durham University between the School of Education, the Department of Psychology and the Department of Computer Science.

nmoon:
November through February is the winter season in Bangladesh. We like pitha specially in this season.


To see this yammy yammy pitha, i think all of you agree with me to arrange a pitha utshab to celebrate this winter.

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