Le soleil,comme vous ne l’avez jamais vu

avril 24, 2010

Photos/Vidéos liées

La NASA délivre des images du Soleil d’une précision exceptionnelle

Hier, 12h12

Maxisciences News de stars

Etats-Unis – L’observatoire solaire de la NASA, le Solar Dynamics Observatory, mis en orbite le 11 février 2010, vient de livrer ses premières images.

Discussion

La mission du SDO (Solar Dynamics Observatory) est d’approfondir les connaissances scientifiques sur le fonctionnement du Soleil. Il renseigne sur les changements d’activité du soleil et les influences de ces changements sur le climat terrestre. Il pourra ainsi déterminer plus précisément la durée du prochain cycle solaire (11 ans en général, ndlr). La première photo de la série a été capturée en ultraviolets, ce qui permet de percevoir des détails non décelables dans les couleurs classiques du Soleil, les tons oranges et jaunes. Ici, la couleur est fonction de la température. Ainsi les zones rouges correspondent à une température de 60.000°C quand le bleu et le vert représentent des températures extrêmement élevées, au-delà d’un million de degrés.On y voit également des éruptions solaires, signes de la reprise d’activité de l’étoile. Dernièrement, les scientifiques s’étaient inquiétés de sa période de repos, plus longue que d’accoutumée (voir article). Sur les images on peut observer une protubérance de gaz chaud très importante, une des plus impressionnantes de ces deux dernières décennies, les particules libérées sont parvenues jusqu’à la Terre, ce qui a entraîné de magnifiques aurores polaires.La définition du SDO équivaut à dix fois celle d’un écran HD, d’où la précision des clichés. La résolution est nettement supérieure à celle des autres observatoires comme on peut le voir sur la dernière image. Le SDO doit en principe effectuer des missions pendant une durée de cinq ans, cependant, avec sa quantité de carburant, il peut fonctionner cinq années supplémentaires, de quoi nous délivrer bien d’autres superbes photos.Voir les images :

Egypt warns Nile Basin countries,from NT

avril 24, 2010

Environment Minister Stanislas Kamanzi

Following the recent failure to agree on water sharing, Egypt has warn upstream countries against signing the Cooperative Framework Agreement (CFA which excluded his country.

“Nile water is a matter of national security to Egypt. We won’t under any circumstances allow our water rights to be jeopardized,” Mohamed Allam, Minister of Water Resources and Irrigation, told Egyptian Parliament this week.

“If the Nile basin countries unilaterally signed the agreement it would be considered the announcement of the Nile Basin Initiative’s death,” Allam added.

However, Rwandan Minister of Land and Environment Stanislas Kamanzi said that despite the good relations between Rwanda and Egypt, they wanted to see the agreement signed.

“In our recent meeting in Sharm El Sheik, Egypt, we agreed to sign this agreement come May 14 but with the exception of the two downstream countries (Egypt and Sudan) since they lacked consensus with the other countries,” said Kamanzi.

The controversy between the upstream and downstream countries of the Nile lies in the signing of the CFA that establishes a permanent commission of the Nile Basin and a clear formality of water sharing.

The CFA replaces a 1929 colonial-era treaty between Egypt and Britain, which gave Egypt veto power over upstream projects. The country also has access to most of the water from one of the world’s longest rivers.

An agreement between Egypt and Sudan in 1959 allowed Egypt 55.5 billion cubic metres of water each year and Sudan 18.5 billion cubic metres.

Some of the Nile Basin countries say past treaties are unfair and they want an equitable water-sharing agreement that would allow for more irrigation and power projects.

Meanwhile, Ethiopia has said that it would go ahead with a new deal with six other countries on sharing the waters of the Nile and accused Egypt of “dragging its feet” on a more equitable treaty.

Burundi, DR Congo, Ethiopia, Kenya, Rwanda, Tanzania and Uganda agreed to the new deal on April 13, only to be shunned by both Egypt and Sudan — the river’s two largest consumers.

Ends

Worries about food security due to El Niño

avril 4, 2010

Citizens worry about crop harvest reduction of the agricultural season B ending in June, due to an unpredictable heavy rainfall causing floods in different areas in Rwanda .The floods are described by scientists of the National University of Rwanda (NUR) as El Nino effects.

El Nino, as described on Wikipedia.org website is a climatic system which influences the weather worldwide and is characterized by irregular warming and cooling of the tropical Pacific Ocean with consequential shifts in atmospheric pressure called Southern Oscillation ,and changes in wind field. The bind of El Niño-Southern Oscillation, also known as ENSO is always associated with floods, droughts and other weather disturbances in many regions of the world.

In Rwanda where ordinary major seasons are four (two rainy and two sunny), some farmers from Huye and Bugesera districts claim they never noticed ,at right moment, the small sunny season  known as “Urugaryi”, which used to happen between December and February.

“Instead of seeing sunlight to dry our crop harvests of season A, rain erosion and inundation destroyed many new plantations on hills and flooded those cultivated in marshlands. We are now re-planting. This may affect next crop harvests”. Said Mukeshimana Consolate,a resident of Mpare cell of Tumba sector in Huye district.

During January and February somebody could see Mpare hills eroded and rice plantations covered by water in marshlands. This case of flood was the same in Gashora wetland crossed by Akagera River in Bugesera district.

Speaking on Radio Rwanda, on April 3rd 2010, Rwasa Jean Pierre heading the Gashora cultivators cooperative said two thirds of plantations in that wetland were transported by floods due to Akagera over bordering.

According to Prof. Jean Nduwamungu, the Director of NUR Center for Geographic Information System and Remote Sensing (CGIS), this kind of irregular rain fall which also does not respect rainy seasons, is the result of El Niño-Southern Oscillation.

“During this year, it will rain so much because our technology has detected El Nino effects. So giving advice to farmers can be difficult to me, but I can urge to avoid cultivating on slopping lands or low lying ones like in marshlands or wetlands.” said Prof. Nduwamungu. He also reminds to plant trees especially agro forestry and to make terraces as ways of avoiding soil erosion.

Apart from causing long rains in East Africa, El Nino is predicted to last from March to May wetter than normal conditions , and drier than normal conditions from December to February in south-central Africa .The  effects are also more  dangerous in continental parts of the globe that dwell in Oceans especially Pacific, Indian and Antarctica.

In this year of 2010, instances have started to occur in some countries like Guyana and PHILIPPINES where El Nino affecting crop production. In Guyana the Government announces sugar reduction because of water shortage ,while in Philippines the United Nations Office for the Coordination of Humanitarian Affairs warns over food security; also because crops die for the drying irrigation.

From NT

avril 3, 2010

Rains claimed 13 lives in Kigali City – Mayor

By Bosco R. Asiimwe

imageCity Mayor Aisa Kirabo Kacyira (File Photo)

The heavy downpour that hit several parts of Kigali City last month left at least 13 people dead, according to the city security report.

The report, unveiled last Wednesday during the city monthly security meeting held at Rwanda Village in Remera, showed that 12 of the victims were washed away by River Nyabarongo that flows through Gasabo District.

Another person was killed by a falling wall in Gahanga, Kicukiro district when the house they were in was destroyed by the rains.

City Mayor, Aisa Kirabo Kacyira, who presided over the meeting, told the Mayors of Gasabo, Kicukiro and Nyarugenge to identify bridges whose conditions are a threat to users.

“That report should be availed within a week so that the city can help where the district and its residents cannot,” Kirabo said.

This follows a report from the national police which revealed that there are some bridges in several parts of the city on the verge of collapsing.

Ends

Inzara ya dinausore

mars 10, 2010

La faim des dinosaures

du 10 décembre 2009 au 2 mai 2010

Affiche  de l'exposition « La faim des dinosaures » du 10 décembre 2009 au 2 mai  2010Une exposition à faire frissonner de plaisir les petits et les grands. Une mise en scène à couper le souffle, un décor spectaculaire peuplé de dinosaures animés à taille réelle !

Les dinosaures font leur grand retour au Palais de la découverte. Il s’agit cette fois-ci d’endosser le rôle du paléontologue et de comprendre les habitudes alimentaires de ces animaux étranges. Les dinosaures « végétariens » mangeaient des plantes, mais en l’absence d’herbe à cette époque, de quels végétaux se nourissaient-ils ? L’observation de modèles animés très réalistes, des reconstitutions grandeur nature de squelettes, la reproduction d’un chantier de fouilles et le travail de dégagement d’ossements de dinosaures en direct viennent compléter l’enquête à mener.

De nombreuses espèces sont présentées et étudiées, du brachiosaure à l’edmontausaure sans oublier le tyrannosaure, le vélociraptor… Le comportement alimentaire de l’Oviraptor est notamment mis en avant. Il est le seul dinosaure dont on ne connait pas les préférences. Tout au long de l’exposition, les indices successifs et parfois contradictoires permettent à chacun d’élaborer sa propre opinion.

Ils fascinent petits et grands, plus vrais que nature, rugissants, animés, les dinosaures font leur grand retour au Palais de la découverte avec l’exposition « La faim des dinosaures » qui propose, sur un parcours de 800m2 une recherche active d’indices pour découvrir comment ces géants se nourrissaient.
Dans un décor d’environnements contemporains de ces dinosaures, le visiteur endosse la panoplie du paléontologue, analyse, teste, fouille, manipule fossiles, mâchoires, dents mais aussi crottes de dinosaures reconstituées et autres indices pour comprendre comment les chercheurs découvrent, petit à petit, ce que mangeaient réellement ces carnivores et végétariens d’un autre âge.
La scénographie de l’exposition est orchestrée autour de différents paysages reconstitués où évoluaient les dinosaures il y a plus de 200 millions d’années mais aussi autour de différents types de dinosaures animés dont les "gueules" et les corps permettent aux visiteurs de participer aux recherches des paléontologues.
Aux détours d’un véritable labyrinthe, le visiteur est confronté dans un premier temps à des têtes animées de brachiosaure, d’edmontosaure et de tyrannosaure : 3 espèces de dinosaures, des végétariens et une carnivore pour comprendre comment analyser les vestiges et informations laissés par leur fabuleuse histoire.

Dans cet espace, un premier atelier virtuel de fouilles permet, à l’aide d’écrans tactiles, de choisir les outils adaptés à cette recherche, de sélectionner les indices utiles…
Un atelier mené par un médiateur scientifique du Palais de la découverte permet également de comprendre le travail mené par le paléontologue, de voir comment s’opère les fouilles, comment l’on dégage un fossile que rien souvent ne laissait soupçonner au départ.

Viennent ensuite 5 scènes où l’on découvre d’autres espèces de dinosaures évoluant dans leur environnement naturel reconstitué :
– le petit Iguanodon,
– l’Euoplocéphalus dont le public pourra analyser… les crottes afin de découvrir comment se nourrissait cet énorme dinosaure !
– Le Coelophysys qui dévoile le contenu de son estomac pour nous faire part de ses préférences alimentaires !
– le gigantesque baryonyx qui attrape et mange des poissons,
– Le Vélociraptor dévorant des carcasses et l’Oviraptor pour lequel subsistent encore de nombreuses questions sur son alimentation.

Dans des paysages surprenants où l’herbe n’existait pas encore, avec des manipulations pour tester la force des mâchoires de dinosaures, des loupes pour analyser le contenu de l’estomac, des crânes reconstitués, des ateliers de fouille, l’exposition la Faim des dinosaures regorge de découvertes, à vivre et à expérimenter en famille !

En parallèle de cette exposition, des exposés spécifiques, consacrés aux dinosaures et menés par des médiateurs scientifiques du Palais de la decouverte, permettront, à ceux qui le souhaitent, d’approfondir leur connaissance sur ce sujet passionnant.

En alliant mise en scène spectaculaire et présentation didactique sur la recherche paléontologique actuelle, le Palais de la découverte réussit, une nouvelle fois, son pari d’ouverture à la démarche scientifique par la curiosité et le ludique.

Inyangabujiji

mars 6, 2010
TECH CENTRAL

5 ways to make your keyboard    easier to use

Take a moment to get to know your keyboard

For most people, the keyboard is the main way to enter information into and control their computer. But are you controlling your keyboard, or is your keyboard controlling you?

If you make typing mistakes or find your keyboard a bit uncomfortable, it’s not hard to correct those problems. Here’s how to quickly and easily change your keyboard settings and comfort options.

1.     Get to know your keyboard

Even if you’ve been using a PC for a long time, there may be features on your keyboard you don’t know about. Take a moment to get to know your keyboard so you can be more efficient when you’re working.

2.  Change keyboard settings

Once you’ve gotten more familiar with your keyboard, there are a few settings you can change to help you work more smoothly.

You can alter:

How long you need to press a key before the keyboard character starts repeating; the speed at which keyboard characters repeat, which helps you to avoid typing errors; and the rate at which the mouse pointer blinks, which can help its visibility.

3.      Take shortcuts

Even if you’re a whiz with the mouse for Windows 7, Windows Vista or Windows XP, keyboard shortcuts are typically a more efficient way to work. They’re called shortcuts because they reduce multiple clicks into one quick press of keys, like hitting a chord on a piano. Getting to know a few keyboard shortcuts for the things you do all the time, like saving or closing files, can make using your PC much easier and faster.

Here are just a few popular keyboard shortcuts that work for both versions of Windows:

Press this To do this
Windows logo key Open the Start menu
ALT+TAB Switch between open programs or windows
CTRL+S Save the current file or document (works in most programs)
CTRL+C Copy the selected item
CTRL+Z Undo an action
Windows logo key +F1 Display Windows Help and Support
ESC Cancel the current task
Application key Open a menu of commands related to a selection in a program. Equivalent to right-clicking the selection.

4.      Make it easier to press multiple keys

Do you find it difficult to press multiple keys at once? For example, if pressing CTRL+ALT+DEL is an acrobatic feat, you can set up Sticky Keys. With Sticky Keys you can hit one key at a time in a keyboard shortcut. You can even set it to make a noise so you know it’s working.

You can set up Sticky Keys in Windows 7, Windows Vista and Windows XP. (Hint: Press your “SHIFT” key 5 times in a row, then click on the link, to get going with Sticky Keys in Windows 7 or Windows Vista.)

5.      Find a comfortable keyboard

It might also be time for you to evaluate the ergonomics of your desktop. Having the right keyboard can really make a difference!

Tips for using your keyboard properly

If a new keyboard isn’t in your future, be sure to use your current keyboard properly to avoid soreness or injury to your wrists, hands, and arms. This is particularly important if you use your computer for long periods of time.

Curious about how to create a more ergonomic work space for yourself? Check out these tips to help you work more comfortably and reduce your risk of painful injuries or disorders.

Here are some general tips to help you avoid problems:

o   Place your keyboard at elbow level, with your upper arms relaxed at your sides.

o   Center your keyboard in front of you. If your keyboard has a numeric keypad, you can use the spacebar as the centering point.

o   While typing, use a light touch and keep your wrists straight.

o   When you’re not typing, relax your arms and hands.

o   Take short breaks every 15 to 20 minutes.

o   Type with your hands and wrists floating above the keyboard, so that you can use your whole arm to reach for distant keys instead of stretching your fingers.

o   Avoid resting your palms or wrists on any type of surface while typing. If your keyboard has a palm rest, use it only during breaks from typing.

Iterabwoba

mars 6, 2010
Saturday, 6th March 2010
Email Article E-mail article Print Article Print article
Mushayidi arrested for terrorism, extradited

L-R: Deo Mushayidi, Martin Ngoga talks to the media after Mushayidi’s arrest ( Photo by F. Goodman)
By Gashegu Muramira
KIGALi – The former president of the Rwanda Journalists Association, Deo Mushayidi has been arrested on charges of terrorism and causing state insecurity.

The Prosecutor General, Martin Ngoga, said last evening that Mushayidi is part of a wider terror network that includes renegade military officers, Lt Gen Kayumba Nyamwasa and Patrick Karegyeya.

“He has been shuttling between various countries in the region and our security forces have been monitoring his movements.

He was arrested following cooperation by law enforcement organs of our neighboring country, Burundi,” Ngoga said.

Mushayidi has since been extradited to Rwanda to face courts of law.

“He is now in the hands of our national police, we have a lot of evidence about his involvement and about the whole network,” Ngoga said.

“The rest are detail that we will keep for investigative purposes.”

The Prosecutor General revealed that at the time of his arrest, Mushayidi was not staying in Belgium as it had been claimed.

“In recent months he had been living in the region”.

Ngoga promised to keep updating Rwandans on the progress of the operation to track down members of the network.

Mushayidi’s arrest comes barely days after prosecution linked the grenade attacks that took place last month on the defected senior RDF officers, who are now reported to be in South Africa.

Ends

How to practice journalism

mars 5, 2010

Journalism requires to be sharp.It is a proffession by which the practitioner proceeds by collecting information,process the information and disseminate the information.For more details i shall provide skills later due to the shortage of time I have now

Hello world!

mars 5, 2010

Welcome to WordPress.com. This is your first post. Edit or delete it and start blogging!


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