NewsAnd Technology

You can see that there's practical value in learning more about Global warming in a snowstorm. Can you think of ways to apply what's been covered so far? The dead of winter – especially this winter with its massive snow storms in the eastern United States – is not the easiest time to make the case for global warming. Short-term weather events and long-range climate change are not the same thing, of course, but it’s hard to separate them in the public’s mind. But it’s even harder these days to convincingly argue that climate change is a reality. “Gloomy unemployment numbers, public frustration with Washington, attacks on climate science, and mobilized opposition to national climate legislation represent a ‘perfect storm’ of events that have lowered public concerns about global warming even among the alarmed,” says Anthony Leiserowitz, director of the Yale Project on Climate Change. Yale and George Mason University recently polled on the question. Since 2008, the number of peop...

BAB I PENDAHULUAN Dalam sejarah manusia, minim sekali pengajar yang sekaligus menerangi jalan kemanusiaan, mengantar mereka pada kebaikan dan menunjukkan jalan yang benar. Dalam hal ini al-Ghazali adalah pribadi yang berjiwa sensitif, berwawasan luas, banyak berkarya dalam aspek pengetahuan. Berawal dari teladan yang telah diberikan oleh al-Ghozali, maka setiap siswa yang cinta ilmu akan senang sekali belajar, menggunakan seluruh waktunya melakukan penelitian, dan studi, yang akan berdaya upaya memecahkan problematik ilmiah, mencernakan ilmu pengetahuan yang didapatinya. Siswa seperti ini akan merasakan lezatnya menggali ilmu pengetahuan dan masalah-masalah ilmiah tanpa segan-segan bertekun siang malam mempersiapkan pelajaran dibuat keesokan harinya. Dapat dikatakan, bahwa aspek kecerdasan, keilmuan dan cinta kebenaran yang dikemukakan Al-Ghazali hampir seribu tahun yang lalu masih mempunyai relevansi dengan dunia pendidikan modern, karena sama-sama menganjurkan untuk menggalakan penel...

                INGAT DAN LUPA DALAM TRANSFER ILMU 1. Pengertian Ingatan Pribadi manusia beserta aktivitas-aktivitasnya tidak semata-mata ditentukan oleh pengaruh dan proses-proses yang berlangsung waktu kini, tetapi juga oleh pengaruh-pengaruh dan proses-proses di masa lampau yang ikut menentukan. Pribadi berkembang di dalam suatu sejarah di mana hal yang lampau dalam cara tertentu selalu ada dan dapat diaktifkan kembali. Secara teori dapat kita bedakan adanya tiga aspek dalam berfungsinya ingatan itu , yaitu: a. Mencamkan, yaitu menerima kesan-kesan. b. Menyimpan kesan-kesan. c. Mereproduksi kesan-kesan. Atas dasar inilah, maka biasanya ingatan didefinisikan sebagai kecakapan untuk menerima, menyimpan, dan mereproduksi kesan-kesan. Pensifatan yang diberikan kepada ingatan juga lalu diberikan kepada masing-masing aspek itu. Ingatan yang baik mempunyai sifat-sifat: cepat atau mudah mencamkan, setia, teguh, luas d...

By Jonathan Leake, Science and Environment Editor THE United Nations climate science panel faces new controversy for wrongly linking global warming to an increase in the number and severity of natural disasters such as hurricanes and floods. It based the claims on an unpublished report that had not been subjected to routine scientific scrutiny — and ignored warnings from scientific advisers that the evidence supporting the link too weak. The report's own authors later withdrew the claim because they felt the evidence was not strong enough. The claim by the Intergovernmental Panel on Climate Change (IPCC), that global warming is already affecting the severity and frequency of global disasters, has since become embedded in political and public debate. It was central to discussions at last month's Copenhagen climate summit, including a demand by developing countries for compensation of $100 billion (£62 billion) from the rich nations blamed for creating the most emissions. Ed Mili...

by Chris Good -- staff editor at TheAtlantic.com Irked by the suggestion of climate change doubters that the East Coast snowstorm is proof that global warming doesn't exist, the liberal Center for American Progress pulled together a conference call today to tell reporters not only that that's not the case, but, basically, to stop being a mouthpiece for people who doubt the science. Jeff Masters, director of meteorology at Weather Underground, got on the call to remind everyone that snowfall does not equal a drop in temperature--that as long as it's cold enough for snow, precipitation means a snowstorm. More precipitation--including heavy snowstorms--is a sign of global warming, he said, as atmospheric moisture levels have increased with warmer temperatures, meaning more storms with heavy snow or rain. "We still will have snowstorms, and the signs of record snowstorms being evidence against global warming is just not true," Masters said. "In the future we shou...

Cyclonic spray scrubbers are an air pollution control technology. They use the features of both the dry cyclone and the spray chamber to remove pollutants from gas streams. Generally, the inlet gas enters the chamber tangentially, swirls through the chamber in a corkscrew motion, and exits. At the same time, liquid is sprayed inside the chamber. As the gas swirls around the chamber, pollutants are removed when they impact on liquid droplets, are thrown to the walls, and washed back down and out. Cyclonic scrubbers are generally low- to medium-energy devices, with pressure drops of 4 to 25 cm (1.5 to 10 in) of water. Commercially available designs include the irrigated cyclone scrubber and the cyclonic spray scrubber. In the irrigated cyclone (Figure 1), the inlet gas enters near the top of the scrubber into the water sprays. The gas is forced to swirl downward, then change directions, and return upward in a tighter spiral. The liquid droplets produced capture the pollutants, are eventu...

Cyclonic separation is a method of removing particulates from an air, gas or water stream, without the use of filters, through vortex separation. Rotational effects and gravity are used to separate mixtures of solids and fluids. A high speed rotating (air)flow is established within a cylindrical or conical container called a cyclone. Air flows in a spiral pattern, beginning at the top (wide end) of the cyclone and ending at the bottom (narrow) end before exiting the cyclone in a straight stream through the center of the cyclone and out the top. Larger (denser) particles in the rotating stream have too much inertia to follow the tight curve of the stream and strike the outside wall, falling then to the bottom of the cyclone where they can be removed. In a conical system, as the rotating flow moves towards the narrow end of the cyclone the rotational radius of the stream is reduced, separating smaller and smaller particles. The cyclone geometry, together with flow rate, defines the cut ...