PAKET UMROH BULAN FEBRUARI MARET APRIL MEI 2018




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Sebuah kendaraan pikap telah menabrak pembatas jalan di Tol Bogor menuju Ciawi. Akibat dari insiden ini, dua orang tewas di tempat.

Petugas Jasa Marga Winda juga menjelaskan, kejadian terjadi tepatnya pada Pukul 04.17 WIB di KM 41 Tol Bogor. Menurut dia, dua orang tewas dan sudah dievakuasi oleh petugas.

"Menurut informasi, mobil tersebut telah menabrak pembatas jalan. Dan dua pengendara tewas di tempat," kata Winda , Selasa (18/3).

Sejauh ini pihaknya juga belum mendapatkan identitas korban dan penyebab pasti kecelakaan. Namun dapat dipastikan arus kendaraan di kedua arah terpantau ramai lancar.

"Memang sempat terjadi kepadatan, namun sekarang sudah lancar kembali," tutur dia

Sekelompok nelayan Sumut lihat pesawat jatuh di Selat Malaka

saco-indonesia.com,

Cara Kerja Generator Set

Generator adalah mesin yang dapat mengubah tenaga mekanis untuk menjadi tenaga listrik dengan melalui proses induksi elektromagnetik. Generator ini telah memperoleh energi mekanis dari prime mover. Generator arus bolak-balik (AC) telah dikenal dengan sebutan alternator. Generator ini diharapkan dapat mensuplai tenaga listrik pada saat terjadi gangguan, dimana suplai tersebut akan digunakan untuk beban prioritas.

Sedangkan genset (generator set) merupakan bagian dari generator. Genset juga merupakan suatu alat yang dapat mengubah energi mekanik menjadi energi listrik. Genset atau sistem generator penyaluran adalah suatu generator listrik yang telah terdiri dari panel, berenergi solar dan terdapat kincir angin yang telah ditempatkan pada suatu tempat. Genset juga dapat digunakan sebagai sistem cadangan listrik atau “off-grid” (sumber daya yang tergantung atas kebutuhan pemakai). Genset juga sering digunakan oleh rumah sakit dan industri yang mempercayakan sumber daya yang mantap, seperti halnya area pedesaan yang tidak ada akses untuk secara komersial menghasilkan listrik. Generator telah terpasang satu poros dengan motor diesel, yang biasanya dengan menggunakan generator sinkron (alternator) pada pembangkitan. Generator sinkron ini terdiri dari dua bagian utama yaitu: sistem medan magnet dan jangkar. Generator ini kapasitasnya besar, medan magnetnya berputar karena terletak pada rotor.

 

Konstruksi generator AC adalah sebagai berikut:

1. Rangka stator
Terbuat dari besi tuang, rangka stator juga merupakan rumah dari bagian-bagian generator yang lain.

2. Stator
Stator telah memiliki alur-alur sebagai tempat untuk meletakkan lilitan stator. Lilitan stator telah berfungsi sebagai tempat GGL induksi.

3. Rotor
Rotor adalah bagian yang berputar, pada bagian ini juga terdapat kutub-kutub magnet dengan lilitannya yang dialiri arus searah, melewati cincin geser dan sikat-sikat.

4. Cincin geser
Terbuat dari bahan kuningan atau tembaga yang yang dipasang pada poros dengan memakai bahan isolasi. Slip ring ini akan berputar bersama-sama dengan poros dan rotor.

5. Generator penguat
Generator penguat juga merupakan generator arus searah yang dipakai sebagai sumber arus.

 

Pada umumnya generator AC ini akan dibuat sedemikian rupa, sehingga lilitan tempat terjadinya GGL induksi tidak akan bergerak, sedangkan kutub-kutub akan menimbulkan medan magnet berputar. Generator itu disebut dengan generator berkutub dalam, dapat dilihat pada gambar berikut.

Keuntungan generator kutub dalam bahwa untuk dapat mengambil arus tidak dibutuhkan cincin geser dan sikat arang. Karena lilitan-lilitan tempat terjadinya GGL itu tidak akan berputar. Generator sinkron juga sangat cocok untuk mesin-mesin dengan tegangan tinggi danarus yang besar.

Secara umum kutub magnet generator sinkron dibedakan atas 2 yaitu :

1. Kutub magnet dengan bagian kutub yang menonjol (salient pole).
Konstruksi seperti ini akan digunakan untuk putaran rendah, dengan jumlah kutub yang banyak. Diameter rotornya besar dan berporos pendek.

2. Kutub magnet dengan bagian kutub yang tidak menonjol (non salient pole).
Konstruksi seperti ini digunakan untuk putaran tinggi (1500 rpm atau 3000 rpm), dengan jumlah kutub yang sedikit. Kira-kira 2/3 dari seluruh permukaan rotor dibuat alur-alur untuk tempat lilitan penguat. Yang 1/3 bagian lagi juga merupakan bagian yang utuh, yang berfungsi sebagai inti kutub.

MESIN DIESEL

Mesin diesel termasuk mesin dengan pembakaran dalam atau disebut dengan motor bakar ditinjau dari cara memperoleh energi termalnya. Untuk dapat membangkikan listrik sebuah mesin diesel menggunakan generator dengan sistem penggerak tenaga disel atauyang biasa dikenal dengan sebutan Genset (Generator Set).

Keuntungan pemakaian mesin diesel sebagai Prime Mover
- Design dan instalasi sederhana
- Auxilary equipment sederhana
- Waktu pembebanan relatif singkat
- Konsumsi bahan bakar relatif murah dan hemat

Kerugian pemakaian mesin diesel sebagai Prime Mover
- Berat mesin yang sangat berat karena harus dapat menahan getaran serta kompresi yang tinggi.
- Starting awal berat, karena kompresinya tinggi yaitu sekitar 200 bar.
- Semakin besar daya maka mesin diesel tersebut dimensinya akan semakin besar pula, hal tersebut telah menyebabkan kesulitan jika daya mesinnya sangat besar.

Ada 2 komponen utama dalam genset yaitu:
1. Prime mover atau pengerak mula, dalam hal ini mesin diesel/engine
2. Generator.

Cara Kerja Mesin Diesel
Prime mover juga merupakan peralatan yang telah mempunyai fungsi menghasilkan energi mekanis yang diperlukan untuk dapat memutar rotor generator. Pada mesin diesel/engine telah terjadi penyalaan sendiri, karena proses kerjanya telah berdasarkan udara murni yang telah dimampatkan di dalam silinder pada tekanan yang tinggi (± 30 arm), sehingga temperatur di dalam silinder naik. Dan pada saat itu bahan bakar disemprotkan dalam silinder yang bertemperatur dan bertekanan tinggi melebihi titik nyala bahan bakar sehingga akan menyala secara otomatis.

Pada mesin diesel penambahan panas atau energi senantiasa dilakukan pada tekanan yang konstan. Pada mesin diesel, piston melakukan 2 langkah pendek menuju kepala silinder pada setiap langkah daya.

1. Langkah ke atas yang pertama merupakan angkah pemasukan dan penghisapan, di sini udara dan bahan bakar masuk sedangkan poros engkol berputar ke bawah.

2. Langkah kedua merupakan langkah kompresi, poros engkol terus berputar dapat menyebabkan torak naik dan menekan bahan bakar sehingga terjadi pembakaran. Kedua proses ini (1 dan 2) juga termasuk proses pembakaran.

3. Langkah ketiga merupakan langkah ekspansi dan kerja, di sini kedua katup yaitu katup isap dan buang tertutup sedangkan poros engkol terus berputar dan menarik kembali torak ke bawah.

4. Langkah keempat merupakan langkah pembuangan, disini katup buang terbuka dan dapat menyebabkan gas akibat sisa pembakaran terbuang keluar. Gas dapat keluar karena padaproses keempat ini torak kembali bergerak naik keatas dan menyebabkan gas dapat keluar. Kedua proses terakhir ini (3 dan 4) juga termasuk proses pembuangan.

5. Setelah keempat proses tersebut, maka proses berikutnya akan mengulang kembali proses yang pertama, dimana udara dan bahan bakar masuk kembali.

Editor : Dian Sukmawati
Sumber : jualgenset.co.id

 

CARA KERJA MESIN GENSET

Kebakaran melanda sebuah rumah di Cimpaeun, Tapos, Depok, Jawa Barat, semalam. Kebakaran ini menyebabkan seorang nenek dan bocah berusia 8 tahun tewas.

"Mereka berdua terjebak dalam rumah tersebut," kata Cucun, petugas pemadam kebakaran Sudin Depok kepada detikcom, Senin (3/5/2013).

Cucun mengatakan, penyebab kebakaran tersebut masih diselidiki oleh petugas kepolisian. "Kalau penyebabnya masih diselidiki," katanya.

Menurut informasi Humas Polda Metro Jaya, kebakaran ini terjadi sekitar pukul 22.30 WIB di kediaman Nurdin. Dua korban yang tewas ialah Sukatna (75) dan Widya, seorang bocah berusia 8 tahun.

KEBAKARAN DI DEPOK MENEWASKAN NENEK DAN BOCAH 8 TAHUN

Kasus dugaan dalam suap Kajari Praya yang telah menyangkut bekas petinggi Partai Hati Nurani Rakyat, Bambang W Soeharto terus berlanjut. KPK juga masih harus mengembangkan penyidikan dengan kembali memeriksa Ketua Dewan Kosgoro itu.

Bambang yang mengenakan baju batik itu tiba di KPK, Jl Rasuna Said, Jakarta Selatan, sekitar pukul 09.48 pagi WIB. Sebelum masuk ke gedung KPK, Bambang juga tidak memberikan keterangan.

"Saya belum tahu, tidak tahu," katanya sambil masuk gedung KPK, (Selasa,11/3).

Bambang yang datang bersama pendampingnya ini langsung masuk ke gedung KPK, saat wartawan bertanya kasus yang menyangkut dirinya.

Bambang sebelumnya telah dicegah ke luar negeri atas permintaan dari KPK. Bambang yang telah menjabat sebagai Ketua Dewan Penasihat Hanura dan Ketua Badan Pemenangan Pemilu Hanura itu langsung dicopot dari jabatannya oleh Ketua Umum Hanura Wiranto begitu diduga telah terlibat dalam kasus tersebut.

Bambang juga merupakan bos dari Lucyta Anie Razak, perempuan yang sebelumnya tertangkap bersama Kepala Kejari Praya Subri di Mataram. Perusahaan Lucyta diduga adalah anak perusahaan milik Bambang. Lucyta dituding menyuap Subri terkait pemalsuan dokumen tanah di Lombok Tengah.

KPK kembali periksa Bambang Soeharto terkait suap Kajari Praya

saco-indonesia.com, Longsor akibat hujan deras dalam sepekan di Kabupaten Jepara, Jawa Tengah telah berdampak 84 rumah rusak. 84 Rumah yang rusak itu telah tersebar di enam kecamatan yang berada di Kabupaten Jepara, Jawa Tengah.

Keenam kecamatan tersebut di antaranya di Desa Tempur (Kecamatan Keling), Desa Klepu (Kecamatan Mbangsri), Desa Mindahan (Kecamatan Batialit), Desa Bungu (Kecamatan Mayong), Desa Sowan Lor (Kecamatan Kedung) dan Desa Tanjung (Kecamatan Pakisaji).

Kondisi kerusakan 84 rumah warga itu beragam. Sebanyak 10 rumah telah mengalami rusak berat, 5 rumah rusak sedang, 65 rumah rusak biasa dan 4 rumah telah mengalami roboh. Puluhan rumah tersebut telah ditempati atau dihuni oleh sebanyak 97 kepala keluarga (KK) saat terjadinya longsor.

"Dua hari terakhir terjadinya longsor pada hari Rabu (22/1) hingga Kamis (23/1) berjumlah 60 rumah itu berada di Desa Tempur, Kecamatan Keling, Kabupaten Jepara. Kerusakan rumahnya juga tidak begitu parah hanya antara 40-60 persen saja kerusakanya," ujar Kepala Pelaksana BPBD Jepara, Lulus Suprayinto .
Lulus juga mengungkapkan tidak ada korban jiwa dalam bencana longsor tersebut. Rata-rata para korban telah mengalami luka ringan seperti lecet-lecet biasa. Namun, ada salah seorang warga Desa Bungu, Kecamatan Mayong yang mengalami patah tulang akibat longsor.

"Kejadiannya yang telah mengalami luka patah tulang itu pada Senin (19/1) lalu. Saat ini sedang menjalani perawatan secara intensif di RSUD Jepara. Dia mendapatkan kompensasi bantuan pengobatan secara gratis dari Pemkab Jepara sehingga dibebaskan dari biaya pengobatan," tegasnya.

Dia mengimbau kepada warga di Jepara untuk dapat meningkatkan kewaspadaan. Serta menghindari pemukiman yang dekat dengan titik rawan bencana longsor. "Paska terjadinya longsor, mereka rata-rata yang rumahnya mengalami kerusakan mengungsikan diri ke tempat rumah sanak saudara mereka disekitar tempat kejadian," pungkasnya.


Editor : Dian Sukmawati

LONGSOR AKIBAT HUJAN

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As he reflected on the festering wounds deepened by race and grievance that have been on painful display in America’s cities lately, President Obama on Monday found himself thinking about a young man he had just met named Malachi.

A few minutes before, in a closed-door round-table discussion at Lehman College in the Bronx, Mr. Obama had asked a group of black and Hispanic students from disadvantaged backgrounds what could be done to help them reach their goals. Several talked about counseling and guidance programs.

“Malachi, he just talked about — we should talk about love,” Mr. Obama told a crowd afterward, drifting away from his prepared remarks. “Because Malachi and I shared the fact that our dad wasn’t around and that sometimes we wondered why he wasn’t around and what had happened. But really, that’s what this comes down to is: Do we love these kids?”

Many presidents have governed during times of racial tension, but Mr. Obama is the first to see in the mirror a face that looks like those on the other side of history’s ledger. While his first term was consumed with the economy, war and health care, his second keeps coming back to the societal divide that was not bridged by his election. A president who eschewed focusing on race now seems to have found his voice again as he thinks about how to use his remaining time in office and beyond.

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Obama Speaks of a ‘Sense of Unfairness’

Obama Speaks of a ‘Sense of Unfairness’

At an event announcing the creation of a nonprofit focusing on young minority men, President Obama talked about the underlying reasons for recent protests in Baltimore and other cities.

By Associated Press on Publish Date May 4, 2015. Photo by Stephen Crowley/The New York Times.

In the aftermath of racially charged unrest in places like Baltimore, Ferguson, Mo., and New York, Mr. Obama came to the Bronx on Monday for the announcement of a new nonprofit organization that is being spun off from his White House initiative called My Brother’s Keeper. Staked by more than $80 million in commitments from corporations and other donors, the new group, My Brother’s Keeper Alliance, will in effect provide the nucleus for Mr. Obama’s post-presidency, which will begin in January 2017.

“This will remain a mission for me and for Michelle not just for the rest of my presidency but for the rest of my life,” Mr. Obama said. “And the reason is simple,” he added. Referring to some of the youths he had just met, he said: “We see ourselves in these young men. I grew up without a dad. I grew up lost sometimes and adrift, not having a sense of a clear path. The only difference between me and a lot of other young men in this neighborhood and all across the country is that I grew up in an environment that was a little more forgiving.”

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Organizers said the new alliance already had financial pledges from companies like American Express, Deloitte, Discovery Communications and News Corporation. The money will be used to help companies address obstacles facing young black and Hispanic men, provide grants to programs for disadvantaged youths, and help communities aid their populations.

Joe Echevarria, a former chief executive of Deloitte, the accounting and consulting firm, will lead the alliance, and among those on its leadership team or advisory group are executives at PepsiCo, News Corporation, Sprint, BET and Prudential Group Insurance; former Secretary of State Colin L. Powell; Senator Cory Booker, Democrat of New Jersey; former Attorney General Eric H. Holder Jr.; the music star John Legend; the retired athletes Alonzo Mourning, Jerome Bettis and Shaquille O’Neal; and the mayors of Indianapolis, Sacramento and Philadelphia.

The alliance, while nominally independent of the White House, may face some of the same questions confronting former Secretary of State Hillary Rodham Clinton as she begins another presidential campaign. Some of those donating to the alliance may have interests in government action, and skeptics may wonder whether they are trying to curry favor with the president by contributing.

“The Obama administration will have no role in deciding how donations are screened and what criteria they’ll set at the alliance for donor policies, because it’s an entirely separate entity,” Josh Earnest, the White House press secretary, told reporters on Air Force One en route to New York. But he added, “I’m confident that the members of the board are well aware of the president’s commitment to transparency.”

The alliance was in the works before the disturbances last week after the death of Freddie Gray, the black man who suffered fatal injuries while in police custody in Baltimore, but it reflected the evolution of Mr. Obama’s presidency. For him, in a way, it is coming back to issues that animated him as a young community organizer and politician. It was his own struggle with race and identity, captured in his youthful memoir, “Dreams From My Father,” that stood him apart from other presidential aspirants.

But that was a side of him that he kept largely to himself through the first years of his presidency while he focused on other priorities like turning the economy around, expanding government-subsidized health care and avoiding electoral land mines en route to re-election.

After securing a second term, Mr. Obama appeared more emboldened. Just a month after his 2013 inauguration, he talked passionately about opportunity and race with a group of teenage boys in Chicago, a moment aides point to as perhaps the first time he had spoken about these issues in such a personal, powerful way as president. A few months later, he publicly lamented the death of Trayvon Martin, a black Florida teenager, saying that “could have been me 35 years ago.”

Photo
 
President Obama on Monday with Darinel Montero, a student at Bronx International High School who introduced him before remarks at Lehman College in the Bronx. Credit Stephen Crowley/The New York Times

That case, along with public ruptures of anger over police shootings in Ferguson and elsewhere, have pushed the issue of race and law enforcement onto the public agenda. Aides said they imagined that with his presidency in its final stages, Mr. Obama might be thinking more about what comes next and causes he can advance as a private citizen.

That is not to say that his public discussion of these issues has been universally welcomed. Some conservatives said he had made matters worse by seeming in their view to blame police officers in some of the disputed cases.

“President Obama, when he was elected, could have been a unifying leader,” Senator Ted Cruz of Texas, a Republican candidate for president, said at a forum last week. “He has made decisions that I think have inflamed racial tensions.”

On the other side of the ideological spectrum, some liberal African-American activists have complained that Mr. Obama has not done enough to help downtrodden communities. While he is speaking out more, these critics argue, he has hardly used the power of the presidency to make the sort of radical change they say is necessary.

The line Mr. Obama has tried to straddle has been a serrated one. He condemns police brutality as he defends most officers as honorable. He condemns “criminals and thugs” who looted in Baltimore while expressing empathy with those trapped in a cycle of poverty and hopelessness.

In the Bronx on Monday, Mr. Obama bemoaned the death of Brian Moore, a plainclothes New York police officer who had died earlier in the day after being shot in the head Saturday on a Queens street. Most police officers are “good and honest and fair and care deeply about their communities,” even as they put their lives on the line, Mr. Obama said.

“Which is why in addressing the issues in Baltimore or Ferguson or New York, the point I made was that if we’re just looking at policing, we’re looking at it too narrowly,” he added. “If we ask the police to simply contain and control problems that we ourselves have been unwilling to invest and solve, that’s not fair to the communities, it’s not fair to the police.”

Moreover, if society writes off some people, he said, “that’s not the kind of country I want to live in; that’s not what America is about.”

His message to young men like Malachi Hernandez, who attends Boston Latin Academy in Massachusetts, is not to give up.

“I want you to know you matter,” he said. “You matter to us.”

Obama Finds a Bolder Voice on Race Issues

HOBART, Tasmania — Few places seem out of reach for China’s leader, Xi Jinping, who has traveled from European capitals to obscure Pacific and Caribbean islands in pursuit of his nation’s strategic interests.

So perhaps it was not surprising when he turned up last fall in this city on the edge of the Southern Ocean to put down a long-distance marker in another faraway region, Antarctica, 2,000 miles south of this Australian port.

Standing on the deck of an icebreaker that ferries Chinese scientists from this last stop before the frozen continent, Mr. Xi pledged that China would continue to expand in one of the few places on earth that remain unexploited by humans.

He signed a five-year accord with the Australian government that allows Chinese vessels and, in the future, aircraft to resupply for fuel and food before heading south. That will help secure easier access to a region that is believed to have vast oil and mineral resources; huge quantities of high-protein sea life; and for times of possible future dire need, fresh water contained in icebergs.

It was not until 1985, about seven decades after Robert Scott and Roald Amundsen raced to the South Pole, that a team representing Beijing hoisted the Chinese flag over the nation’s first Antarctic research base, the Great Wall Station on King George Island.

But now China seems determined to catch up. As it has bolstered spending on Antarctic research, and as the early explorers, especially the United States and Australia, confront stagnant budgets, there is growing concern about its intentions.

China’s operations on the continent — it opened its fourth research station last year, chose a site for a fifth, and is investing in a second icebreaker and new ice-capable planes and helicopters — are already the fastest growing of the 52 signatories to the Antarctic Treaty. That gentlemen’s agreement reached in 1959 bans military activity on the continent and aims to preserve it as one of the world’s last wildernesses; a related pact prohibits mining.

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But Mr. Xi’s visit was another sign that China is positioning itself to take advantage of the continent’s resource potential when the treaty expires in 2048 — or in the event that it is ripped up before, Chinese and Australian experts say.

“So far, our research is natural-science based, but we know there is more and more concern about resource security,” said Yang Huigen, director general of the Polar Research Institute of China, who accompanied Mr. Xi last November on his visit to Hobart and stood with him on the icebreaker, Xue Long, or Snow Dragon.

With that in mind, the polar institute recently opened a new division devoted to the study of resources, law, geopolitics and governance in Antarctica and the Arctic, Mr. Yang said.

Australia, a strategic ally of the United States that has strong economic relations with China, is watching China’s buildup in the Antarctic with a mix of gratitude — China’s presence offers support for Australia’s Antarctic science program, which is short of cash — and wariness.

“We should have no illusions about the deeper agenda — one that has not even been agreed to by Chinese scientists but is driven by Xi, and most likely his successors,” said Peter Jennings, executive director of the Australian Strategic Policy Institute and a former senior official in the Australian Department of Defense.

“This is part of a broader pattern of a mercantilist approach all around the world,” Mr. Jennings added. “A big driver of Chinese policy is to secure long-term energy supply and food supply.”

That approach was evident last month when a large Chinese agriculture enterprise announced an expansion of its fishing operations around Antarctica to catch more krill — small, protein-rich crustaceans that are abundant in Antarctic waters.

“The Antarctic is a treasure house for all human beings, and China should go there and share,” Liu Shenli, the chairman of the China National Agricultural Development Group, told China Daily, a state-owned newspaper. China would aim to fish up to two million tons of krill a year, he said, a substantial increase from what it currently harvests.

Because sovereignty over Antarctica is unclear, nations have sought to strengthen their claims over the ice-covered land by building research bases and naming geographic features. China’s fifth station will put it within reach of the six American facilities, and ahead of Australia’s three.

Chinese mappers have also given Chinese names to more than 300 sites, compared with the thousands of locations on the continent with English names.

In the unspoken competition for Antarctica’s future, scientific achievement can also translate into influence. Chinese scientists are driving to be the first to drill and recover an ice core containing tiny air bubbles that provide a record of climate change stretching as far back as 1.5 million years. It is an expensive and delicate effort at which others, including the European Union and Australia, have failed.

In a breakthrough a decade ago, European scientists extracted an ice core nearly two miles long that revealed 800,000 years of climate history. But finding an ice core going back further would allow scientists to examine a change in the earth’s climate cycles believed to have occurred 900,000 to 1.2 million years ago.

China is betting it has found the best location to drill, at an area called Dome A, or Dome Argus, the highest point on the East Antarctic Ice Sheet. Though it is considered one of the coldest places on the planet, with temperatures of 130 degrees below zero Fahrenheit, a Chinese expedition explored the area in 2005 and established a research station in 2009.

“The international community has drilled in lots of places, but no luck so far,” said Xiao Cunde, a member of the first party to reach the site and the deputy director of the Institute for Climate Change at the Chinese Academy of Meteorological Sciences. “We think at Dome A we will have a straight shot at the one-million-year ice core.”

Mr. Xiao said China had already begun drilling and hoped to find what scientists are looking for in four to five years.

To support its Antarctic aspirations, China is building a sophisticated $300 million icebreaker that is expected to be ready in a few years, said Xia Limin, deputy director of the Chinese Arctic and Antarctic Administration in Beijing. It has also bought a high-tech fixed-wing aircraft, outfitted in the United States, for taking sensitive scientific soundings from the ice.

China has chosen the site for its fifth research station at Inexpressible Island, named by a group of British explorers who were stranded at the desolate site in 1912 and survived the winter by excavating a small ice cave.

Mr. Xia said the inhospitable spot was ideal because China did not have a presence in that part of Antarctica, and because the rocky site did not have much snow, making it relatively cheap to build there.

Anne-Marie Brady, a professor of political science at the University of Canterbury in New Zealand and the author of a soon-to-be-released book, “China as a Polar Great Power,” said Chinese scientists also believed they had a good chance of finding mineral and energy resources near the site.

“China is playing a long game in Antarctica and keeping other states guessing about its true intentions and interests are part of its poker hand,” she said. But she noted that China’s interest in finding minerals was presented “loud and clear to domestic audiences” as the main reason it was investing in Antarctica.

Because commercial drilling is banned, estimates of energy and mineral resources in Antarctica rely on remote sensing data and comparisons with similar geological environments elsewhere, said Millard F. Coffin, executive director of the Institute for Marine and Antarctic Studies in Hobart.

But the difficulty of extraction in such severe conditions and uncertainty about future commodity prices make it unlikely that China or any country would defy the ban on mining anytime soon.

Tourism, however, is already booming. Travelers from China are still a relatively small contingent in the Antarctic compared with the more than 13,000 Americans who visited in 2013, and as yet there are no licensed Chinese tour operators.

But that is about to change, said Anthony Bergin, deputy director of the Australian Strategic Policy Institute. “I understand very soon there will be Chinese tourists on Chinese vessels with all-Chinese crew in the Antarctic,” he said.

 

Top News China’s Intents Are Questioned as It Builds in Antarctica

The 6-foot-10 Phillips played alongside the 6-11 Rick Robey on the Wildcats team that won the 1978 N.C.A.A. men’s basketball title.

Mike Phillips, Half of Kentucky’s ‘Twin Towers’ of Basketball, Dies at 59
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Many bodies prepared for cremation last week in Kathmandu were of young men from Gongabu, a common stopover for Nepali migrant workers headed overseas. Credit Daniel Berehulak for The New York Times

KATHMANDU, Nepal — When the dense pillar of smoke from cremations by the Bagmati River was thinning late last week, the bodies were all coming from Gongabu, a common stopover for Nepali migrant workers headed overseas, and they were all of young men.

Hindu custom dictates that funeral pyres should be lighted by the oldest son of the deceased, but these men were too young to have sons, so they were burned by their brothers or fathers. Sukla Lal, a maize farmer, made a 14-hour journey by bus to retrieve the body of his 19-year-old son, who had been on his way to the Persian Gulf to work as a laborer.

“He wanted to live in the countryside, but he was compelled to leave by poverty,” Mr. Lal said, gazing ahead steadily as his son’s remains smoldered. “He told me, ‘You can live on your land, and I will come up with money, and we will have a happy family.’ ”

Weeks will pass before the authorities can give a complete accounting of who died in the April 25 earthquake, but it is already clear that Nepal cannot afford the losses. The countryside was largely stripped of its healthy young men even before the quake, as they migrated in great waves — 1,500 a day by some estimates — to work as laborers in India, Malaysia or one of the gulf nations, leaving many small communities populated only by elderly parents, women and children. Economists say that at some times of the year, one-quarter of Nepal’s population is working outside the country.

Nepal’s Young Men, Lost to Migration, Then a Quake

Mr. Napoleon was a self-taught musician whose career began in earnest with the orchestra led by Chico Marx of the Marx Brothers.

Marty Napoleon, 93, Dies; Jazz Pianist Played With Louis Armstrong

WASHINGTON — During a training course on defending against knife attacks, a young Salt Lake City police officer asked a question: “How close can somebody get to me before I’m justified in using deadly force?”

Dennis Tueller, the instructor in that class more than three decades ago, decided to find out. In the fall of 1982, he performed a rudimentary series of tests and concluded that an armed attacker who bolted toward an officer could clear 21 feet in the time it took most officers to draw, aim and fire their weapon.

The next spring, Mr. Tueller published his findings in SWAT magazine and transformed police training in the United States. The “21-foot rule” became dogma. It has been taught in police academies around the country, accepted by courts and cited by officers to justify countless shootings, including recent episodes involving a homeless woodcarver in Seattle and a schizophrenic woman in San Francisco.

Now, amid the largest national debate over policing since the 1991 beating of Rodney King in Los Angeles, a small but vocal set of law enforcement officials are calling for a rethinking of the 21-foot rule and other axioms that have emphasized how to use force, not how to avoid it. Several big-city police departments are already re-examining when officers should chase people or draw their guns and when they should back away, wait or try to defuse the situation

Police Rethink Long Tradition on Using Force

Ms. Rendell was a prolific writer of intricately plotted mystery novels that combined psychological insight, social conscience and teeth-chattering terror.

Ruth Rendell, Novelist Who Thrilled and Educated, Dies at 85
Frontline  An installment of this PBS program looks at the effects of Ebola on Liberia and other countries, as well as the origins of the outbreak.
Frontline

Frontline An installment of this PBS program looks at the effects of Ebola on Liberia and other countries, as well as the origins of the outbreak.

The program traces the outbreak to its origin, thought to be a tree full of bats in Guinea.

Review: ‘9-Man’ Is More Than a Game for Chinese-Americans

A variation of volleyball with nine men on each side is profiled Tuesday night on the World Channel in an absorbing documentary called “9-Man.”

Television

‘Hard Earned’ Documents the Plight of the Working Poor

“Hard Earned,” an Al Jazeera America series, follows five working-class families scrambling to stay ahead on limited incomes.

Review: ‘Frontline’ Looks at Missteps During the Ebola Outbreak

The 2015 Met Gala has only officially begun, but there's a clear leader in the race for best couple, no small feat at an event that threatens to sap Hollywood of every celebrity it has for the duration of an East Coast evening.

That would be Marc Jacobs and his surprise guest (who, by some miracle, remained under wraps until their red carpet debut), Cher.

“This has been a dream of mine for a very, very long time,” Mr. Jacobs said.

It is Cher's first appearance at the Met Gala since 1997, when she arrived on the arm of Donatella Versace.

– MATTHEW SCHNEIER

Cher and Marc Jacobs

Hired in 1968, a year before their first season, Mr. Fanning spent 25 years with the team, managing them to their only playoff appearance in Canada.

Jim Fanning, 87, Dies; Lifted Baseball in Canada With Expos

Under Mr. Michelin’s leadership, which ended when he left the company in 2002, the Michelin Group became the world’s biggest tire maker, establishing a big presence in the United States and other major markets overseas.

François Michelin, Head of Tire Company, Dies at 88

The magical quality Mr. Lesnie created in shooting the “Babe” films caught the eye of the director Peter Jackson, who chose him to film the fantasy epic.

Andrew Lesnie, Cinematographer of ‘Lord of the Rings,’ Dies at 59

Ms. Crough played the youngest daughter on the hit ’70s sitcom starring David Cassidy and Shirley Jones.

Suzanne Crough, Actress in ‘The Partridge Family,’ Dies at 52
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