Dozens detained after protesters in Amsterdam Dozens of pro-Palestinian demonstrators have been detained by police in Amsterdam after defying a ban on public protests in the Dutch capital. Hundreds gathered in Dam Square on Sunday, calling for an end to the conflict in Gaza and expressing dissent towards the ban. Demonstrations were temporarily banned by the mayor after Israeli football fans were targeted in what she called "hit-and-run" attacks on Thursday night after a match between Maccabi Tel Aviv and Ajax Amsterdam. The Israeli government has advised its citizens to "categorically avoid" Israeli sports and cultural events while abroad - specifically the football match between France and Israel in Paris on Thursday. Authorities say Thursday's attacks - which caused five people to be hospitalised - were motivated by antisemitism as the fans were sought out across the city. The violence - which was condemned by leaders in Europe, the US and in Israel - has led to at least 62 arrests. The outcry was exacerbated by the attacks occurring on the eve of commemorations of the Nazi pogroms against German Jews that took place in November 1938. Three-quarters of Jewish people in the Netherlands were murdered during the Holocaust in World War Two. Amsterdam police said there had also been trouble the night before the match. Police chief Peter Holla said there had been incidents "on both sides", including Israeli supporters removing a Palestinian flag from a wall and setting it alight, and attacking a taxi. The city's Mayor Femke Halsema announced a ban on public assembly on Friday lasting at least until the end of the weekend, deeming the city a "high-risk security area". But protesters on Sunday argued they should be free to voice their disapproval of Israel's actions in Gaza and the actions of the Maccabi supporters. "This protest has nothing to do with antisemitism," Alexander van Stokkum, one of the demonstrators, told the AFP news agency on Sunday. "It is against Israeli hooligans who were destroying our city." Others told a Reuters journalist: "We refuse to let the charge of antisemitism be weaponised to suppress Palestinian resistance." The news agency reported that more than 100 people were detained for attending the protest. Police in Amsterdam confirmed there had been arrests, but have yet to say how many. Following the protest ban, Dutch activist Frank van der Linde applied for an urgent permit so Sunday's demonstration could go ahead. On X, he said that he wanted to protest what he described as "the genocide in Gaza", adding: "We will not let our right to demonstrate be taken away." Mr Van der Linde was overruled by Amsterdam's district court, which wrote on Sunday that "the mayor has rightly determined that there is a ban on demonstrating in the city this weekend". Dutch national newspaper De Telegraaf reports Mr Van der Linde was among those arrested. The Israeli embassy in the Netherlands earlier warned Israelis in Amsterdam to avoid Dam square, saying the event "may flare up into significant violent incidents". Israel's National Security Council has told its citizens to avoid public demonstrations "of any kind" and conceal "anything that could identify you as Israeli/Jewish", citing Thursday's attacks. "Preparations to harm Israelis have been identified in several European cities, including Brussels (Belgium), major cities in the UK, Amsterdam (Netherlands), and Paris," it claimed. Paris's police chief has pledged that 4,000 officers would be deployed in the stadium and across the French capital for the Nations League match on 14 November. (www.bbc.com)

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How Magnetic Rooms Work Magnetic rooms, also known as magnetic resonance imaging (MRI) rooms, are specialized medical facilities that use powerful magnetic fields and radio waves to generate detailed images of structures inside the body. These rooms house large MRI machines and are carefully designed to safely contain the strong magnetic fields while allowing medical staff to operate the equipment and care for patients. This essay will explain the key components and principles behind how magnetic rooms function. The MRI Machine At the heart of a magnetic room is the MRI scanner itself. This large, cylindrical machine contains several key components: A powerful superconducting electromagnet that generates a strong, uniform magnetic field Gradient coils that produce smaller magnetic fields to pinpoint specific areas of the body Radiofrequency (RF) coils that transmit and receive radio waves A computer system to control the machine and process image data The superconducting magnet is cooled with liquid helium to near absolute zero temperatures. This allows it to conduct electricity with virtually no resistance, creating an extremely strong and stable magnetic field - typically 1.5 to 3 tesla, which is 30,000 to 60,000 times stronger than the Earth's magnetic field. Magnetic Shielding To contain the powerful magnetic field and prevent interference with other equipment, magnetic rooms employ several shielding techniques: The walls, floor, and ceiling are lined with thin copper or aluminum sheets that block the magnetic field The room is surrounded by a Faraday cage to block external RF signals The entrance typically has a double-door system to maintain shielding when people enter/exit Safety Precautions Strict safety protocols are essential in magnetic rooms due to the strength of the magnetic field: All ferromagnetic objects are prohibited to prevent them from becoming dangerous projectiles Image Generation Process When a patient enters the magnetic room and is positioned in the MRI machine: By carefully controlling the magnetic fields and radio waves, technicians can create precise images of different types of tissue throughout the body. In conclusion, magnetic rooms are marvels of modern medical technology, utilizing powerful magnets, sophisticated electronics, and careful design to safely peer inside the human body. Their ability to produce detailed, non-invasive images has revolutionized medical diagnosis and treatment across many fields of medicine. #magnetic #Rooms #Work

#mewton #physics #flight The Physics of Flight: Applying Newton's Laws and Bernoulli's Theorem to Aircraft Aerodynamics Introduction The ability of massive metal machines weighing hundreds of tons to defy gravity and soar through the air is one of the most impressive technological achievements of the modern era. While the Wright brothers' first powered flight in 1903 lasted only 12 seconds and covered 120 feet, today's commercial airliners can stay aloft for over 17 hours and travel nearly 10,000 miles nonstop. This remarkable progress has been made possible through advancements in aeronautical engineering, which is fundamentally grounded in classical physics principles like Newton's laws of motion and Bernoulli's theorem. This essay will examine in depth how Newton's laws and Bernoulli's theorem combine to explain the principles of aircraft flight. We will analyze the role of each law in generating lift, explore the importance of airfoil design, and investigate other factors affecting aerodynamic performance. By integrating theoretical concepts with experimental data and real-world examples, we aim to provide a comprehensive understanding of the complex physics behind modern aviation. Newton's Laws and Aircraft Lift Newton's First Law: Inertia Newton's first law states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. In the context of aviation, this law explains why an aircraft in level flight tends to remain in steady motion. The various forces acting on the aircraft (thrust, drag, lift, and weight) are in equilibrium, allowing it to maintain a constant velocity (Beard & McLain, 2012). Newton's Second Law: Force and Acceleration The second law, F = ma, relates force, mass, and acceleration. This fundamental equation governs the motion of an aircraft in flight. When the thrust produced by engines exceeds the drag force, the aircraft accelerates. Similarly, when lift exceeds weight, the aircraft climbs. The precise control of these forces allows pilots to maneuver aircraft with remarkable precision (Anderson, 2016). Newton's Third Law: Action and Reaction Newton's third law, which states that for every action there is an equal and opposite reaction, is perhaps the most crucial in understanding lift generation. As an aircraft's wings move through the air, they deflect air downwards. The equal and opposite reaction to this downward deflection of air is an upward force on the wings - lift. This can be visualized using the concept of a control volume around the wing: ^ Lift | -->|--> Airflow | v Downwash The rate of downward momentum imparted to the air is equal to the upward force (lift) experienced by the wing. This principle is often referred to as the "momentum theory" of lift (Smith, 1992). Bernoulli's Theorem and Airfoil Design While Newton's laws provide a fundamental explanation for lift, Bernoulli's theorem offers additional insights, particularly in understanding the pressure distribution around an airfoil. Bernoulli's Equation Bernoulli's equation states that in steady, inviscid, incompressible flow, the total pressure along a streamline remains constant: P + 1/2 ρv² + ρgh = constant Where: Application to Airfoils The key to understanding how Bernoulli's theorem applies to airfoils lies in the shape of the wing. A typical airfoil has a curved upper surface (extrados) and a flatter lower surface (intrados): Extrados ____________ / \ / \ /________________\ Intrados As air flows over the wing, it must travel a greater distance over the curved upper surface than the flatter lower surface in the same amount of time. This results in higher velocity over the upper surface. According to Bernoulli's equation, this higher velocity corresponds to lower static pressure (Kundu et al., 2016). The pressure difference between the lower and upper surfaces of the wing creates a net upward force - lift. This explanation is often called the "equal transit time" theory, though it's important to note that in reality, air passing over the top of the wing actually reaches the trailing edge before air passing under the wing. Integration of Newton's Laws and Bernoulli's Theorem While Newton's laws and Bernoulli's theorem are often presented as competing explanations for lift, they are in fact complementary. Bernoulli's theorem helps explain the pressure distribution around the airfoil, while Newton's laws account for the reaction force from deflecting the airflow. Modern computational fluid dynamics (CFD) simulations have shown that both effects contribute to lift generation. The relative importance of each can vary depending on factors such as angle of attack, airfoil shape, and flight speed (McLean, 2012). Other Factors Affecting Aerodynamic Performance Viscosity and Boundary Layers Real fluids, unlike those in idealized models, have viscosity. This leads to the formation of boundary layers - thin regions of fluid close to the surface where viscous forces are significant. The behavior of these boundary layers, including whether they remain laminar or become turbulent, significantly affects drag and lift (Schlichting & Gersten, 2016). Vortex Formation As an airfoil generates lift, it also produces vortices, particularly at the wing tips. These wing tip vortices are a major source of induced drag. Understanding and mitigating their effects is crucial for improving aircraft efficiency (Auld & Srinivas, 2017). Wing ____________ | | | | Wingtip Vortex | | / |____________|/ \ \ Angle of Attack The angle of attack - the angle between the chord line of an airfoil and the direction of the oncoming air flow - plays a critical role in lift generation. As the angle of attack increases, lift generally increases up to a critical angle. Beyond this point, the airflow separates from the upper surface of the wing, leading to a sudden loss of lift known as stall (Anderson, 2016). Experimental Data and Real-World Applications Theoretical principles are validated and refined through extensive wind tunnel testing and flight data analysis. For example, pressure distribution measurements on actual aircraft wings have confirmed the lower pressure on the upper surface predicted by Bernoulli's theorem. NASA's Advanced Subsonic Technology (AST) program conducted detailed studies on high-lift systems, providing valuable data on how various wing configurations affect lift and drag. These studies have led to the development of sophisticated multi-element airfoils used in modern aircraft (NASA, 2000). In practice, aircraft designers use a combination of theoretical models, computational simulations, and experimental data to optimize wing design. Factors such as cruise speed, required lift coefficient, and operational altitude all influence the final airfoil shape and overall wing configuration. Conclusion The principles of flight, grounded in Newton's laws and Bernoulli's theorem, represent a triumph of applied physics and engineering. By manipulating airflow to create pressure differentials and momentum changes, aircraft designers have enabled humans to soar through the skies with remarkable efficiency and safety. As we've seen, the generation of lift is a complex phenomenon involving multiple interacting factors. While simplified explanations can provide intuitive understanding, a truly comprehensive grasp of aerodynamics requires integrating various theoretical approaches with experimental data and real-world observations. Looking to the future, ongoing research in areas such as adaptive wing structures, laminar flow control, and advanced composite materials promises to further enhance aircraft performance and efficiency. As our understanding of aerodynamics continues to evolve, so too will our ability to push the boundaries of aviation technology. References Anderson, J. D. (2016). Fundamentals of Aerodynamics (6th ed.). McGraw-Hill Education. Auld, M., & Srinivas, K. (2017). Aerodynamics for Engineers (6th ed.). Pearson. Beard, R. W., & McLain, T. W. (2012). Small Unmanned Aircraft: Theory and Practice. Princeton University Press. Kundu, P. K., Cohen, I. M., & Dowling, D. R. (2016). Fluid Mechanics (6th ed.). Academic Press. McLean, D. (2012). Understanding Aerodynamics: Arguing from the Real Physics. John Wiley & Sons. NASA. (2000). NASA/CR-2000-210323 - High-Lift System Aerodynamics. NASA Technical Reports Server. Schlichting, H., & Gersten, K. (2016). Boundary-Layer Theory (9th ed.). Springer. Smith, A. M. O. (1992). High-Lift Aerodynamics. Journal of Aircraft, 29(6), 1238-1248.

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Žene u ovim godinama imaju najbolji intimni odnos, najviše uživaju i doživljavaju najčešće i najjače orgazme U mlađim godinama, žene su često opterećene društvenim očekivanjima, nesigurnostima u vezi sa svojim tijelom i često još uvijek istražuju vlastite želje i granice. S druge strane, kada dostignu određenu zrelost, ove se nesigurnosti počinju smanjivati, a samopouzdanje i prihvaćanje vlastitog tijela postaju izraženiji. Većina žena u ovim godinama već zna što voli, a što ne voli, i ne boji se to izraziti svom partneru. Osim toga, istraživanja pokazuju da žene u ovoj dobi češće preuzimaju inicijativu i aktivnije sudjeluju u intimnim odnosima, što dodatno doprinosi zadovoljstvu. Jedan od ključnih faktora za povećano zadovoljstvo u ovim godinama je emocionalna zrelost. Žene koje su prošle kroz različita životna iskustva – bilo da su bile u dugotrajnim vezama, prošle kroz prekide ili brakove, odgoj djece ili profesionalne izazove – dolaze do faze u kojoj više cijene vlastite potrebe i granice. Također, emocionalna stabilnost omogućava im da se lakše prepuste trenutku i stvarno uživaju u intimnosti bez straha ili nesigurnosti. To često dovodi do snažnijih emocionalnih povezanosti s partnerom, što dodatno pojačava se*sualni doživljaj. Hormonske promjene također igraju važnu ulogu. Tijekom ovih godina, žene mogu iskusiti promjene u hormonalnoj ravnoteži, što može povećati libido i poboljšati se*sualno zadovoljstvo. Iako menopauza donosi određene promjene u tjelesnoj funkciji, mnoge žene primjećuju da im se se*sualna želja povećava neposredno prije menopauze ili tijekom perimenopauze. Osim toga, ove hormonalne promjene često rezultiraju dubljim emocionalnim vezama, što doprinosi intenzivnijim osjećajima i jačim orgazmima. Povrh svega, intimnost u ovoj dobi postaje prožeta osjećajem slobode i eksperimentiranja. Žene u ovim godinama često su otvorenije prema istraživanju novih načina intimnog povezivanja s partnerom, kao i prema isprobavanju novih tehnika i položaja. Bez pritiska ili nesigurnosti koje su možda postojale ranije, žene su u mogućnosti bolje istražiti vlastite granice, a često i više razgovaraju s partnerom o vlastitim željama. Takva otvorenost i komunikacija povećavaju kvalitetu odnosa i donose veću ispunjenost. Osim što imaju veću slobodu da izraze svoje želje, mnoge žene u ovim godinama koriste različite alate kako bi dodatno poboljšale svoje se*sualno iskustvo. Kroz edukaciju, čitanje ili razgovor s prijateljicama, dolaze do novih informacija o sebi i svojim željama. Time razvijaju bolju povezanost sa sobom i svojim tijelom, što rezultira većim zadovoljstvom. U zaključku, razdoblje između 35. i 50. godine predstavlja jedinstvenu fazu u životu žene kada se*sualno zadovoljstvo često dostiže vrhunac. Kombinacija emocionalne zrelosti, samopouzdanja, iskustva i hormonalnih promjena omogućava ženama da uživaju u intimnim odnosima kao nikada prije. (odmorimozak) #intimniodnos #zene #godine

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[Kada je žensko tijelo bez intimnih odnosa: Stvari o kojima mnoge žene ćute] Intimni odnosi su važan dio života mnogih žena, ali ponekad se događa da žena ostane bez njih na duži period, bilo zbog svjesnog izbora ili okolnosti. Društvo često nameće ideju da su intimni odnosi ključni za sreću, zdravlje i ispunjenost, ali realnost je mnogo složenija. O tome se često šuti jer postoji osjećaj srama ili strah od osude. Međutim, važno je otvoreno razgovarati o promjenama koje se događaju u tijelu i umu kada nema intimnih odnosa, jer to nije samo fizička, već i emocionalna tema. Fizičke promjene Jedna od najčešćih fizičkih promjena koje žene mogu primijetiti u periodima bez intimnih odnosa odnosi se na vaginalno zdravlje. Tijekom intimnih odnosa dolazi do povećanog protoka krvi u intimnom području, što može pomoći održavanju elastičnosti vaginalnog tkiva. Kada nema aktivnosti, dolazi do smanjenja prirodnog podmazivanja i elastičnosti, što može uzrokovati nelagodu tijekom budućih odnosa. Starije žene, posebno one u menopauzi, mogu primijetiti izraženije promjene zbog smanjenja estrogena, hormona koji igra ključnu ulogu u vaginalnom zdravlju. Osim toga, nedostatak fizičke aktivnosti koja dolazi s intimnim odnosima može utjecati na cirkulaciju krvi i rad kardiovaskularnog sustava. Iako intimni odnosi nisu jedini način održavanja zdravlja srca, oni mogu biti važan izvor fizičke aktivnosti za neke žene, pa njihov izostanak može utjecati na opće fizičko zdravlje. Emocionalne promjene Nedostatak intimnih odnosa također može dovesti do emocionalnih promjena. Iako svaka žena drugačije reagira, mnoge žene priznaju da im nedostaje osjećaj povezanosti i bliskosti koji dolazi s intimnim vezama. Intimnost ne podrazumijeva samo fizički čin, već i emocionalnu povezanost s partnerom, osjećaj sigurnosti i ljubavi. Kada nema intimnih odnosa, neke žene mogu osjetiti smanjeno samopouzdanje ili osjećaj nesigurnosti u vezi sa svojim tijelom. Društvene norme i pritisci često doprinose ovim osjećajima, stvarajući ideju da je se*sualna aktivnost povezana s vrijednošću žene. Međutim, važno je napomenuti da se*sualna aktivnost nije jedini izvor samopouzdanja i da žena može biti potpuno ispunjena i bez toga. Hormonski efekti Nedostatak intimnih odnosa također može utjecati na hormonalnu ravnotežu. Tijekom intimnih odnosa oslobađaju se hormoni poput oksitocina, poznatog kao “hormon ljubavi”, koji doprinosi osjećaju sreće i povezanosti. Bez redovnih intimnih odnosa, razina oksitocina može biti niža, što može uzrokovati osjećaj usamljenosti ili emocionalne praznine. Također, redovni intimni odnosi mogu doprinijeti smanjenju razine stresa i napetosti jer se tijekom odnosa oslobađaju endorfini, hormoni koji podižu raspoloženje. Nedostatak tih hormona može dovesti do povećanog stresa i nervoze u svakodnevnom životu. Samootkrivanje i samopouzdanje S druge strane, mnoge žene u periodima bez intimnih odnosa otkrivaju novu stranu sebe. Odsustvo fizičkih veza može im pružiti vrijeme za fokusiranje na sebe, svoje interese i emocionalni razvoj. Mnoge žene uče biti zadovoljne sobom bez vanjskih potvrda i nauče uživati u vlastitom društvu. Također, odsustvo intimnih odnosa može biti prilika za postavljanje novih standarda u budućim vezama. Mnoge žene postaju svjesnije svojih želja i potreba, uče postavljati granice i ne pristaju na manje nego što zaslužuju. Na taj način, period bez intimnih odnosa može biti faza osobnog rasta i osnaživanja. Iako je tema odsustva intimnih odnosa često prekrivena velom tišine, važno je da žene znaju da nisu same. Fizičke, emocionalne i psihološke promjene su normalan dio života, i svaka žena ima pravo na svoje izbore i svoje vrijeme. Važno je slušati svoje tijelo, ali i svoj um, i ne podleći pritiscima okoline. Odsustvo intimnih odnosa nije kraj svijeta, već prilika za rast i otkrivanje novih aspekata vlastite ličnosti. (prirodni-lijekovi.com)