brennung, Universität Stuttgart, 70550 Stuttgart, Federal Republic of Germany
In connection with recombination coefficients derived from experimental data described in the literature, a reaction scheme including detailed rate expressions for O and N atom recombination on the surface of re-entry vehicles is established, consisting of elementary reaction steps. To validate the reaction mechanism derived, surface chemistry and fluid mechanical processes are coupled assuming a one-dimensional stagnation flow field. A quantitative agreement is achieved between recombination coefficients resulting from the numerical computations and those calculated from experiments. The temperature dependence of the recombination coefficient is explained by elementary reaction steps. Furthermore, the reaction scheme established is implemented in a two-dimensional Navier–Stokes code computing the re-entry flow around a simple geometry to show the importance of a detailed modeling of surface.Quite some time ago, I laid down some things I'm looking for in a home automation solution. I've recently come to the conclusion that Z-wave is probably mature enough to begin experimenting with. It's a closed protocol owned by a single company, but the company has been around long enough and has affiliated with enough consumer partners that it's unlikely to vanish tomorrow. It may not be secure (it looks like there are security features in the protocol, but I don't know yet if all devices support them), but it should support the debugging and status features I'm looking for that I was never able to get working with INSTEON. To that end, I purchased a UZB stick from Z-Wave.Me and a GE Dimmable Lamp Module and started experimenting. This will be an ongoing trip; we'll see where we end up.
There's a neat trick you can do with angled plastic to give the impression of an image floating in space. While this is technically a "Pepper's Ghost" illusion, it commonly goes online by the name "Pyramid Hologram." For our friends at Iguanatron, we put together a top-down projector implementation with a 20" computer monitor.
So here's how it went down.
Dipping a toe into Z-Wave with the UZB controller...
Playing with light: "Hologram" (Pepper's Ghost) pr...Horst Köhler, the UN Special Envoy for the Western Sahara, resigns sparking statements by both Morocco and Algeria, the latter of which has continued to crackdown against former regime figures accused of corruption.
As part of the series of arrest against former-regime figures and corruption, the former Minister of Industry, Abdeslam Bouchouareb, who is being investigated for instances of corruption, is reportedly evading authorities in Lebanon (Observ Algérie)[1]. Mouad Bouchareb, President of the National People’s Assembly (AFN), was prevented from hosting a meeting of the first chamber office after the ruling National Liberation Front party decided to freeze the AFN’s activities (Jeune Afrique)[2]. The Algerian Union of Journalists also organized a protest against assaults on journalists by law enforcement (Observ Algérie)[3].
In other news, Algeria was officially declared malaria-free, one of only two countries in Africa, the other being Mauritius, to have such a status (RFI Afrique)[4]. And, in light of the resignation of Horst Köhler, the UN Special Envoy for the Western Sahara, Algeria expressed its ‘deep regret’ (Algérie Patriotique)[5].
At least 17 people were injured in an explosion that targeted a tourist bus near the pyramids of Giza (La Libre)[6]. In an apparent retaliatory action, 12 suspected Islamist militants were later killed by Egyptian authorities, though it is unclear if these particular militants were connected to the aforementioned incident (Reuters)[7].
In other news, Egypt has signed a deal with a Cypriot firm to lay a 310-kilometre cable under the Mediterranean Sea to export electricity to Europe (Arab News)[8].
As more international actors including Canada, Malta and neighboring Tunisia, have weighed in with statements regarding the conflict in and around Tripoli, Ghassan Salamé, the UN Special Envoy for Libya, has expressed concern with the international approach to the conflict (Africanews; The Libya Observer)[9]. He claimed that the international community lacks the moral motivation to end the Libyan war, and views the country as a prize to be captured (The Guardian)[10]. This comes as French President, Emmanuel Macron, was reportedly told by Khalifa Haftar that he does not intend to look for a ceasefire for now (Reuters)[11].
Meanwhile, humanitarian organizations have continued to express alarm and concern at the deteriorating conditions for migrants and refugees detained in detention camps in and around Tripoli, demanding that they be evacuated as soon as possible (Euronews)[12].
Two bloggers in Mauritania were detained without charge, leading their lawyers to call upon the UN Working Group on Arbitrary Detention to act for their release (L’Authentique)[13]. These calls were also echoed by Amnesty International (Sahara Medias)[14]. Aminata Kane, a Mauritanian TV journalist, and her technician-fitter were suspended for criticizing President Aziz (C.R.I.D.E.M.)[15].
In other news, the electoral alliance of the opposition parties has accused the government of causing a ‘hold-up’ of the election process (Sahara Medias)[16]. Birame Dah Abeid has also called for a campaign of solidarity among the political opposition (L’Authentique)[17].
After only 20 months in office, Horst Köhler, the UN Special Envoy for the Western Sahara, resigned, Morocco released a statement thanking him and wishing him well for the future (Yabiladi)[18]. Also, regarding the Western Sahara, the Peruvian Council for Solidarity with the Sahrawi Arab Democratic Republic (RASD), has revised its position concluding that the options proposed by the RASD for referendum and independence are currently unrealistic and unviable, and that the RASD should instead align their position with that of the UN Security Council (Le360)[19].
There has been widespread anger and indignation in Moroccan civil society due to the release of the preliminary results of the second National Survey on the Prevalence of Violence Against Women (2M)[20]. On this topic however, Spanish authorities have decided to reopen cases of sexual assault perpetrated against Moroccan seasonal workers, in a move that was praised (Yabiladi)[21].
There were reports of clashes between the police and several local taxi drivers outside the trial court in Kasserine, the latter of which were protesting for the releases of both the President and Vice-President of the Union of Taxi Drivers (Tunisie Numérique)[22]. Moncef Kartas, a UN expert that was imprisoned on suspicion of spying, was released by Tunisian authorities (Le Point)[23].
The government has decided that the controversial draft law on heritage will not be voted on during its current mandate (Mosaique FM)[24]. But there were also reports that a café owner was arrested for opening his café during the holy month of Ramadan (Business News)[25].NewswireToday - /newswire/ - Regina, Saskatchewan, Canada, 2015/07/31 - WIND Mobile to focus resources on providing strong competition and LTE rollout - WINDMobile.ca / SaskTel.com.
SaskTel today announced that Industry Canada has approved the spectrum licence transfer of 2 blocks of prime AWS-1 spectrum from WIND Mobile to SaskTel. This spectrum transfer will allow SaskTel to significantly increase the capacity and speed of its 4G LTE network in the 9 major urban centres in Saskatchewan. The agreement will also allow WIND Mobile to focus resources on providing strong competition and LTE rollout in Ontario, British Columbia and Alberta.
For more information, please contact Michelle Englot, SaskTel Director of External Communications.
A thorough study of the biological sciences reveals that these central, unifying ideas often rely upon one another. Emphasis will be placed on this inter-connectedness throughout the course.
In addition to these “Big Ideas”, an emphasis will be placed on the development of sound scientific practices, such as concept explanation, visual representation, developing scientific questions and experimental methods, representing and describing data, statistical tests and data analysis, and scientific argumentation.
Biology is a challenging and exciting subject. This class is focused on helping you develop a strong biological foundation and skill set in the biological sciences. It is not designed to be a “test prep” class. The AP exam will ask you to “think like a biologist”. That is my goal as well. I firmly believe that those with a good understanding of biology are well-prepared for better understanding their own place within this beautifully complicated world and are well-suited for asking and answering important questions and solving the urgent problems that we deal with individually and globally. I will do everything I can to help you succeed! Keep in mind though, that success is not limited to earning an A or B or scoring well on the AP Exam. Success in this class (as in life) also depends on whether or not you actually learn anything that helps you refine your understanding of the world around you and better envision your place within it. It is my job to plan learning activities and guide you through these activities to help you achieve this understanding. It is your job to engage, ask questions (of me, of your fellow students, and of yourself), and commit to your own learning.
It is my hope that we will create a community of learners in our classroom—a community that will encourage everybody to engage in dialogue,