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突然諗到,反重力系統同太空升降機可唔可以撈埋嚟用?
突然諗到,反重力系統同太空升降機可唔可以撈埋嚟用?![]()
我諗呢個要睇個反重力技術的推力可以去到幾大,如果夠大就唔洗升降機咁整死一個位,可以週圍載貨上太空。
突然諗到,反重力系統同太空升降機可唔可以撈埋嚟用?![]()
我諗呢個要睇個反重力技術的推力可以去到幾大,如果夠大就唔洗升降機咁整死一個位,可以週圍載貨上太空。
暫時睇,空氣係其中一個條件,可能升到一個位要拉上去
Nownews 今日新聞
英國24歲華裔女學生劉梅姬(Maggie Lieu)是火星移民計畫「Mars One」申請者,她表示希望能生下首位「火星寶寶」。
據英國《鏡報》(The Mirror)報導,「Mars One」計畫耗資40億英鎊,預計自2024年起,每2年運送2名太空人至火星,最後會有40人定居火星,並繁衍生子。
「Mars One」申請者總共有20萬人,目前已篩選出600人,而若劉梅姬進入40人名單,今年便會開始接受為期10年的訓練,學習火星生存技能。
劉梅姬表示,她曉得在火星生存挑戰極高,且該地表並無太空船發射台,旅程定是有去無回,但仍無法動搖她成為火星首位「人類始祖」的決心,「我們會在那裡創建一切,尋找食物來源、創造屬於我們的氧氣」。
http://forum1.hkgolden.com/view.aspx?type=CA&message=5656775
時間表..![]()
星際啟示錄![]()
敢問咁多位,40億英鎊可以解決地球上幾多問題?火星計劃
港豬O大橋因為技術問題宣佈通車無期
依度好似已經講過共產黨無足夠既技術
起人工島都搞左好耐
依度好似已經講過共產黨無足夠既技術
起人工島都搞左好耐
港豬O大橋因為技術問題宣佈通車無期
依度好似已經講過共產黨無足夠既技術
起人工島都搞左好耐![]()
聽完瞓咗都笑醒![]()
幾時到膠鐵![]()
回水啦
睇死個政府唔敢追
港豬O大橋因為技術問題宣佈通車無期
依度好似已經講過共產黨無足夠既技術
起人工島都搞左好耐![]()
聽完瞓咗都笑醒![]()
幾時到膠鐵![]()
共產黨好大喜功
幾多GDP係死谷出黎
好快就要還架啦
一方面係債務上
二方面係環境上
習總派心腹來港 CY大劑喇
海外網媒《博訊》報道習近平心腹、中共國家安全委員會辦公室副主任蔡奇日前秘密來港,可能對中聯辦進行調整,預計會有高官落台。
這宗報道馬上在香港政界惹起熱論。有政界中人向《壹錘定音》主持李慧玲表示,將有比蔡奇更高級的官員,來港親自收集民情。
政界中人更透露,有內地傳話人指,中央派員來港,最想問一個問題:為什麼九七回歸之後,香港年輕人會有離心,甚至支持港獨?
觀乎梁振英不斷以強硬手法處理香港青年問題,包括在施政報告點名批港大學生會刊物學苑,又籌組成立香港青少年軍。慧玲認為,如果習近平認同梁振英在港處理青年手法,就不用另派欽差來港。相反,馬雲成立十億基金助港青年創業,外界一直視為有中央身影,顯示北京想採取較柔性方法處理港青,而不是全盤否定佔領一族。
換言之,北京對中聯辦和梁振英提供的情報,不收貨,拒絕袋住先。
大換血
海外網媒《博訊》報道習近平心腹、中共國家安全委員會辦公室副主任蔡奇日前秘密來港,可能對中聯辦進行調整,預計會有高官落台。
這宗報道馬上在香港政界惹起熱論。有政界中人向《壹錘定音》主持李慧玲表示,將有比蔡奇更高級的官員,來港親自收集民情。
政界中人更透露,有內地傳話人指,中央派員來港,最想問一個問題:為什麼九七回歸之後,香港年輕人會有離心,甚至支持港獨?
觀乎梁振英不斷以強硬手法處理香港青年問題,包括在施政報告點名批港大學生會刊物學苑,又籌組成立香港青少年軍。慧玲認為,如果習近平認同梁振英在港處理青年手法,就不用另派欽差來港。相反,馬雲成立十億基金助港青年創業,外界一直視為有中央身影,顯示北京想採取較柔性方法處理港青,而不是全盤否定佔領一族。
換言之,北京對中聯辦和梁振英提供的情報,不收貨,拒絕袋住先。
大換血
港豬O大橋因為技術問題宣佈通車無期
依度好似已經講過共產黨無足夠既技術
起人工島都搞左好耐![]()
聽完瞓咗都笑醒![]()
幾時到膠鐵![]()
共產黨好大喜功
幾多GDP係死谷出黎
好快就要還架啦
一方面係債務上
二方面係環境上![]()
![]()
我看是故意,因為香港大型基建,是支那最好的提款機。
支那科技吹幾大都好,我不太相信起條海底隨道技術都無
原定明年落成的港珠澳大橋工程一波三折,至今通車無期。廣東省發改委主任李春洪今日(10日)透露,主橋的海底沉管工程出現阻滯,已分析了3個月但仍未找出原因,更形容沉管連接工程「難如太空對接」,不但明年底通車「困難很大、很大」,就連2017年是否能完工,他亦僅回應指「很難說」。有立法會議員擔心本地的大橋工程已一拖再拖,如果內地主橋亦出現延誤,本港部分即使建成亦無法與主橋連接起來,屆時可能會再引發超支問題。
港豬O大橋因為技術問題宣佈通車無期
依度好似已經講過共產黨無足夠既技術
起人工島都搞左好耐![]()
聽完瞓咗都笑醒![]()
幾時到膠鐵![]()
共產黨好大喜功
幾多GDP係死谷出黎
好快就要還架啦
一方面係債務上
二方面係環境上![]()
![]()
又一件破壞環境既大白象/垃圾
3D打印車
https://youtube.com/watch?v=4rww0QiRavo
睇入面個網格結構,個強度應該唔差,當然如果用蜂巢形可能更有趣![]()
硬係覺得好易散不過3D PRINT打杖用既戰鬥機械人都咪話唔屈機
![]()
耐唔耐熱都係一個問題![]()
熱度應該係<= 打印過程中material fusion既溫度unless又送入焗爐做heat treatment
其實 thermoset 比較可以頂到高溫
thermoset都要做一次heat treatment先得
Nownews 今日新聞
英國24歲華裔女學生劉梅姬(Maggie Lieu)是火星移民計畫「Mars One」申請者,她表示希望能生下首位「火星寶寶」。
據英國《鏡報》(The Mirror)報導,「Mars One」計畫耗資40億英鎊,預計自2024年起,每2年運送2名太空人至火星,最後會有40人定居火星,並繁衍生子。
「Mars One」申請者總共有20萬人,目前已篩選出600人,而若劉梅姬進入40人名單,今年便會開始接受為期10年的訓練,學習火星生存技能。
劉梅姬表示,她曉得在火星生存挑戰極高,且該地表並無太空船發射台,旅程定是有去無回,但仍無法動搖她成為火星首位「人類始祖」的決心,「我們會在那裡創建一切,尋找食物來源、創造屬於我們的氧氣」。
http://forum1.hkgolden.com/view.aspx?type=CA&message=5656775
時間表..![]()
星際啟示錄![]()
敢問咁多位,40億英鎊可以解決地球上幾多問題?火星計劃![]()
一個高鐡都解決唔到呀!!
岩岩手機想㩒頁數手錯㩒左負評
唔好意思#![]()
我個人認為人既靈魂係不滅,咁如果有方法將個靈魂包括記憶轉移到其他軀殼到咪都算係長生不老
transhumanism 都想做到呢樣,但唔知轉嗰時有咩發生,同埋轉咗之後仲係咪人呢?![]()
要去太空旅行,一係做到長生不老,一係掉咗嗰 "臭皮囊",用 "替身",兩邊研究都有人做緊
人體是靈魂的載體, 兩者由細到大已經非常適應, 如果只把靈魂轉載入其他載體包括超級電腦真的不知會發生什麼事; 另外聖經記載靈魂是屬於神的, 未經神的批准而自行改變載體便已經犯下大罪.
到時咪好似阿凡達咁,地球一個載體,其他星球一個載體,不過轉黎轉去個載體一定會好多問題發生,分分鐘個靈魂痴左線,兩邊要做唔同角色,仲未計要適應個物質body
劉進圖:CY或委親信進港大 伺機開除戴耀廷
【 報道全文:http://bit.ly/1zJmPLc 】
今日,港大法律學院舊生、《明報》前總編輯劉進圖今天撰文,譴責左報近日頻繁攻擊港大法律學院前任院長陳文敏,是「大失民心、脫離現實」的敗政,只會消滅原來的中間派溫和聲音,將香港社會推向兩極化的撕裂局面,又指出中方在港代理人在處理後佔中「秋後算帳」一事上,弄錯「向誰算帳」、「算什麼帳」及「怎樣算帳」等原則問題。
文章以「批鬥陳文敏損中港利益」為題,先寫有了解情況的人士指,左派力圖阻撓陳文敏升任港大副校長,作為懲罰港大的第一步。又指,特首梁振英有可能委任親信到港大校委會,便可成立紀律處分小組,伺機開除戴耀廷,阻嚇其他熱衷政治的教職員再參與公民抗命。劉進圖批評,這種做法猶如內地官場「『政治正確』凌駕一切」的作風,但卻會將港人推到「非友即敵的兩極化懸崖」。

https://www.facebook.com/standnewshk/photos/a.720050934747196.1073741828.710476795704610/747267492025540
【 報道全文:http://bit.ly/1zJmPLc 】
今日,港大法律學院舊生、《明報》前總編輯劉進圖今天撰文,譴責左報近日頻繁攻擊港大法律學院前任院長陳文敏,是「大失民心、脫離現實」的敗政,只會消滅原來的中間派溫和聲音,將香港社會推向兩極化的撕裂局面,又指出中方在港代理人在處理後佔中「秋後算帳」一事上,弄錯「向誰算帳」、「算什麼帳」及「怎樣算帳」等原則問題。
文章以「批鬥陳文敏損中港利益」為題,先寫有了解情況的人士指,左派力圖阻撓陳文敏升任港大副校長,作為懲罰港大的第一步。又指,特首梁振英有可能委任親信到港大校委會,便可成立紀律處分小組,伺機開除戴耀廷,阻嚇其他熱衷政治的教職員再參與公民抗命。劉進圖批評,這種做法猶如內地官場「『政治正確』凌駕一切」的作風,但卻會將港人推到「非友即敵的兩極化懸崖」。

https://www.facebook.com/standnewshk/photos/a.720050934747196.1073741828.710476795704610/747267492025540
No Big Bang? Quantum equation predicts universe has no beginning

This is an artist's concept of the metric expansion of space, where space (including hypothetical non-observable portions of the universe) is represented at each time by the circular sections. Note on the left the dramatic expansion (not to scale) occurring in the inflationary epoch, and at the center the expansion acceleration. The scheme is decorated with WMAP images on the left and with the representation of stars at the appropriate level of development. Credit: NASA
(Phys.org) —The universe may have existed forever, according to a new model that applies quantum correction terms to complement Einstein's theory of general relativity. The model may also account for dark matter and dark energy, resolving multiple problems at once.
The widely accepted age of the universe, as estimated by general relativity, is 13.8 billion years. In the beginning, everything in existence is thought to have occupied a single infinitely dense point, or singularity. Only after this point began to expand in a "Big Bang" did the universe officially begin.
Although the Big Bang singularity arises directly and unavoidably from the mathematics of general relativity, some scientists see it as problematic because the math can explain only what happened immediately after—not at or before—the singularity.
"The Big Bang singularity is the most serious problem of general relativity because the laws of physics appear to break down there," Ahmed Farag Ali at Benha University and the Zewail City of Science and Technology, both in Egypt, told Phys.org.
Ali and coauthor Saurya Das at the University of Lethbridge in Alberta, Canada, have shown in a paper published in Physics Letters B that the Big Bang singularity can be resolved by their new model in which the universe has no beginning and no end.
Old ideas revisited
The physicists emphasize that their quantum correction terms are not applied ad hoc in an attempt to specifically eliminate the Big Bang singularity. Their work is based on ideas by the theoretical physicist David Bohm, who is also known for his contributions to the philosophy of physics. Starting in the 1950s, Bohm explored replacing classical geodesics (the shortest path between two points on a curved surface) with quantum trajectories.
In their paper, Ali and Das applied these Bohmian trajectories to an equation developed in the 1950s by physicist Amal Kumar Raychaudhuri at Presidency University in Kolkata, India. Raychaudhuri was also Das's teacher when he was an undergraduate student of that institution in the '90s.
Using the quantum-corrected Raychaudhuri equation, Ali and Das derived quantum-corrected Friedmann equations, which describe the expansion and evolution of universe (including the Big Bang) within the context of general relativity. Although it's not a true theory of quantum gravity, the model does contain elements from both quantum theory and general relativity. Ali and Das also expect their results to hold even if and when a full theory of quantum gravity is formulated.
No singularities nor dark stuff
In addition to not predicting a Big Bang singularity, the new model does not predict a "big crunch" singularity, either. In general relativity, one possible fate of the universe is that it starts to shrink until it collapses in on itself in a big crunch and becomes an infinitely dense point once again.
Ali and Das explain in their paper that their model avoids singularities because of a key difference between classical geodesics and Bohmian trajectories. Classical geodesics eventually cross each other, and the points at which they converge are singularities. In contrast, Bohmian trajectories never cross each other, so singularities do not appear in the equations.
In cosmological terms, the scientists explain that the quantum corrections can be thought of as a cosmological constant term (without the need for dark energy) and a radiation term. These terms keep the universe at a finite size, and therefore give it an infinite age. The terms also make predictions that agree closely with current observations of the cosmological constant and density of the universe.
New gravity particle
In physical terms, the model describes the universe as being filled with a quantum fluid. The scientists propose that this fluid might be composed of gravitons—hypothetical massless particles that mediate the force of gravity. If they exist, gravitons are thought to play a key role in a theory of quantum gravity.
In a related paper, Das and another collaborator, Rajat Bhaduri of McMaster University, Canada, have lent further credence to this model. They show that gravitons can form a Bose-Einstein condensate (named after Einstein and another Indian physicist, Satyendranath Bose) at temperatures that were present in the universe at all epochs.
Motivated by the model's potential to resolve the Big Bang singularity and account for dark matter and dark energy, the physicists plan to analyze their model more rigorously in the future. Their future work includes redoing their study while taking into account small inhomogeneous and anisotropic perturbations, but they do not expect small perturbations to significantly affect the results.
"It is satisfying to note that such straightforward corrections can potentially resolve so many issues at once," Das said.
Source: http://phys.org/news/2015-02-big-quantum-equation-universe.html

This is an artist's concept of the metric expansion of space, where space (including hypothetical non-observable portions of the universe) is represented at each time by the circular sections. Note on the left the dramatic expansion (not to scale) occurring in the inflationary epoch, and at the center the expansion acceleration. The scheme is decorated with WMAP images on the left and with the representation of stars at the appropriate level of development. Credit: NASA
(Phys.org) —The universe may have existed forever, according to a new model that applies quantum correction terms to complement Einstein's theory of general relativity. The model may also account for dark matter and dark energy, resolving multiple problems at once.
The widely accepted age of the universe, as estimated by general relativity, is 13.8 billion years. In the beginning, everything in existence is thought to have occupied a single infinitely dense point, or singularity. Only after this point began to expand in a "Big Bang" did the universe officially begin.
Although the Big Bang singularity arises directly and unavoidably from the mathematics of general relativity, some scientists see it as problematic because the math can explain only what happened immediately after—not at or before—the singularity.
"The Big Bang singularity is the most serious problem of general relativity because the laws of physics appear to break down there," Ahmed Farag Ali at Benha University and the Zewail City of Science and Technology, both in Egypt, told Phys.org.
Ali and coauthor Saurya Das at the University of Lethbridge in Alberta, Canada, have shown in a paper published in Physics Letters B that the Big Bang singularity can be resolved by their new model in which the universe has no beginning and no end.
Old ideas revisited
The physicists emphasize that their quantum correction terms are not applied ad hoc in an attempt to specifically eliminate the Big Bang singularity. Their work is based on ideas by the theoretical physicist David Bohm, who is also known for his contributions to the philosophy of physics. Starting in the 1950s, Bohm explored replacing classical geodesics (the shortest path between two points on a curved surface) with quantum trajectories.
In their paper, Ali and Das applied these Bohmian trajectories to an equation developed in the 1950s by physicist Amal Kumar Raychaudhuri at Presidency University in Kolkata, India. Raychaudhuri was also Das's teacher when he was an undergraduate student of that institution in the '90s.
Using the quantum-corrected Raychaudhuri equation, Ali and Das derived quantum-corrected Friedmann equations, which describe the expansion and evolution of universe (including the Big Bang) within the context of general relativity. Although it's not a true theory of quantum gravity, the model does contain elements from both quantum theory and general relativity. Ali and Das also expect their results to hold even if and when a full theory of quantum gravity is formulated.
No singularities nor dark stuff
In addition to not predicting a Big Bang singularity, the new model does not predict a "big crunch" singularity, either. In general relativity, one possible fate of the universe is that it starts to shrink until it collapses in on itself in a big crunch and becomes an infinitely dense point once again.
Ali and Das explain in their paper that their model avoids singularities because of a key difference between classical geodesics and Bohmian trajectories. Classical geodesics eventually cross each other, and the points at which they converge are singularities. In contrast, Bohmian trajectories never cross each other, so singularities do not appear in the equations.
In cosmological terms, the scientists explain that the quantum corrections can be thought of as a cosmological constant term (without the need for dark energy) and a radiation term. These terms keep the universe at a finite size, and therefore give it an infinite age. The terms also make predictions that agree closely with current observations of the cosmological constant and density of the universe.
New gravity particle
In physical terms, the model describes the universe as being filled with a quantum fluid. The scientists propose that this fluid might be composed of gravitons—hypothetical massless particles that mediate the force of gravity. If they exist, gravitons are thought to play a key role in a theory of quantum gravity.
In a related paper, Das and another collaborator, Rajat Bhaduri of McMaster University, Canada, have lent further credence to this model. They show that gravitons can form a Bose-Einstein condensate (named after Einstein and another Indian physicist, Satyendranath Bose) at temperatures that were present in the universe at all epochs.
Motivated by the model's potential to resolve the Big Bang singularity and account for dark matter and dark energy, the physicists plan to analyze their model more rigorously in the future. Their future work includes redoing their study while taking into account small inhomogeneous and anisotropic perturbations, but they do not expect small perturbations to significantly affect the results.
"It is satisfying to note that such straightforward corrections can potentially resolve so many issues at once," Das said.
Source: http://phys.org/news/2015-02-big-quantum-equation-universe.html
No Big Bang? Quantum equation predicts universe has no beginning
This is an artist's concept of the metric expansion of space, where space (including hypothetical non-observable portions of the universe) is represented at each time by the circular sections. Note on the left the dramatic expansion (not to scale) occurring in the inflationary epoch, and at the center the expansion acceleration. The scheme is decorated with WMAP images on the left and with the representation of stars at the appropriate level of development. Credit: NASA
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其實系學術界,有好多研究文章係為左金主服務,無證據不過應該唔奇
但唔知會唔會同軍事一樣,有 D 學術研究理論早已經發展好,但唔公開?
照理唔會,應該個個都想早D發表以免遲一步,但唔知事實係咪咁哩??
【一人一萬蚊救亞視】葉家寶:香港人係好有愛心同情心
秒後自動載入第 34 頁
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