قال الله تعالى

 {  إِنَّ اللَّــهَ لا يُغَيِّــرُ مَـا بِقَــوْمٍ حَتَّــى يُـغَيِّـــرُوا مَــا بِــأَنْــفُسِــــهِـمْ  }

سورة  الرعد  .  الآيـة   :   11

ahlaa

" ليست المشكلة أن نعلم المسلم عقيدة هو يملكها، و إنما المهم أن نرد إلي هذه العقيدة فاعليتها و قوتها الإيجابية و تأثيرها الإجتماعي و في كلمة واحدة : إن مشكلتنا ليست في أن نبرهن للمسلم علي وجود الله بقدر ما هي في أن نشعره بوجوده و نملأ به نفسه، بإعتباره مصدرا للطاقة. "
-  المفكر الجزائري المسلم الراحل الأستاذ مالك بن نبي رحمه الله  -

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science

الخميس, 17 أيلول/سبتمبر 2020 17:24

The brain rhythms that detach us from reality

كتبه
The state of dissociation is commonly described as feeling detached from reality or having an ‘out of body’ experience. This altered state of consciousness is often reported by people who have psychiatric disorders arising from devastating trauma or abuse. It is also evoked by a class of anaesthetic drug, and can occur in epilepsy. The neurological basis of dissociation has been a mystery, but writing in Nature, Vesuna et al.1 describe a localized brain rhythm that underlies this state. Their findings will have far-reaching implications for neuroscience. The authors first recorded brain-wide neuronal activity in mice using a technique called widefield calcium imaging. They…
The accusation that the Chinese government delayed in letting the world know about the COVID-19 outbreak has become a political weapon in countries including the US, the UK and Canada. But China’s scientists have won international praise for hitting several key milestones in understanding the novel, fast-moving virus. Chinese leaders were seen as slow to react to the outbreak that began in the city of Wuhan, suppressing information and even punishing those who raised the alarm. “There was an early cover up in Wuhan, perhaps a few days to a week, before the threat was accepted. We will never know…
There was nowhere to land amid all the broken ice. On 6 February, three scientists were in a helicopter flying high above the ocean roughly 250 kilometres from the North Pole, and all they could see was jumbled masses of fractured sea ice. The ice was clearly unfit to land on. Just a week before, it had been smooth, thick and flat. They circled the region a few times and, when they spotted a seemingly solid section nearby, the pilot repeatedly tapped the helicopter against the ice to test whether the surface was stable. Then the scientists jumped out in…
Photos from the areas hardest hit by the novel coronavirus SARS-CoV-2 tell a story of disinfection: Trucks spraying streets and a phalanx of sanitation workers wearing backpack tanks fogging sidewalks, parks, and plazas in China, South Korea, Italy, and elsewhere. Countless recommendations admonish us to wash our hands and disinfect often-touched surfaces in our homes. But what is the most effective way to prevent exposure to the virus? Like other coronaviruses, severe acute respiratory syndrome coronavirus 2, which causes COVID-19, is thought to spread most commonly through invisible respiratory droplets sent into the air when an infected person coughs or…
السبت, 07 آذار/مارس 2020 15:50

COVID-19 and the anti-lessons of history

كتبه
As the outbreak of coronavirus disease 2019 (COVID-19) in China's Hubei province continues and new cases of the disease increase globally, 1  there is pressure on historians to show the value of history for policy. How can the past assist in the real-time management of the crisis? What insights can be gleaned from the ongoing epidemic for future disease preparedness and prevention? Lurking in the background of these interrogatives is a more or less explicit accusation: why haven't past lessons been learned? The gist of some commentaries seems to be: “there is almost nothing surprising about this pandemic”. 2  The…
الخميس, 25 نيسان/أبريل 2019 09:53

8 Health Benefits of Fasting, Backed by Science

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Despite its recent surge in popularity, fasting is a practice that dates back centuries and plays a central role in many cultures and religions. Defined as the abstinence from all or some foods or drinks for a set period of time, there are many different ways of fasting. In general, most types of fasts are performed over 24–72 hours. Intermittent fasting, on the other hand, involves cycling between periods of eating and fasting, ranging from a few hours to a few days at a time. Fasting has been shown to have many health benefits, from increased weight loss to better…
In a letter to the journal Nature, 18 scientists and ethicists from seven countries called for a global moratorium on the type of gene editing that can result in genetically altered babies. The letter was prompted by a 2018 announcement by a Chinese scientist declaring the birth of the world’s first gene-edited twin babies. “The 18 signatories of this call include scientists and ethicists who are citizens of 7 countries. Many of us have been involved in the gene-editing field by developing and applying the technology, organizing and speaking at international summits, serving on national advisory committees and studying the ethical…
الجمعة, 15 آذار/مارس 2019 17:22

Access to medicines—business as usual?

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High medicine prices are never far from the headlines, affecting access for everyone from those living in the world's most advanced economies to those in the least developed. The pharmaceutical industry, projected to be worth almost $1·6 trillion by 2020, is widely vilified for its role in this. Pharmaceutical companies are notoriously opaque in disclosing the exact costs involved in bringing a new medicine to the market. Industry-sponsored research suggests that the overall cost is around $2·6 billion. Pressure is mounting on the industry. In February, seven global pharmaceutical company executives appeared before a Senate Finance Committee to answer questions on the high…
Japanese neurosurgeons have implanted ‘reprogrammed’ stem cells into the brain of a patient with Parkinson’s disease for the first time. The condition is only the second for which a therapy has been trialled using induced pluripotent stem (iPS) cells, which are developed by reprogramming the cells of body tissues such as skin so that they revert to an embryonic-like state, from which they can morph into other cell types. Scientists at Kyoto University use the technique to transform iPS cells into precursors to the neurons that produce the neurotransmitter dopamine. A shortage of neurons producing dopamine in people with Parkinson’s…
The terrestrial land surface has a crucial role in the global carbon cycle, providing feedbacks to changes in atmospheric levels of carbon dioxide and associated climate change1. Increases in atmospheric CO2concentrations and in soil and air temperatures worldwide over the past several decades have been paralleled by an increase in the metabolism of organisms at the land surface — as demonstrated by enhanced rates of CO2 uptake, mainly by plants through photosynthesis, and of CO2 loss from plants and soil microorganisms, mostly owing to respiratory processes2–6. In a paper in Nature, Bond-Lamberty et al.7 report that the rate of increase of CO2 loss is outpacing that of…
السبت, 30 حزيران/يونيو 2018 09:48

Tesla Motors, The Visionary Dream of Elon Musk [Futures & Risks]

كتبه
I have to be honest with you: when I think of a Tesla car my mind expands and my senses get heightened. Actually, it’s enough to read something about the company and I feel my interest growing! If you feel the same and you want to know more about the most interesting company of the hour, stick with us. In the rows below we’ll have a heart-to-heart about Tesla Motors and the cars it produces.   First, I think it’s important to know that Tesla Motors was founded in 2003 by Elon Musk and a few other car enthusiasts who…
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