What ‘sniffer’ planes can tell us about North Korea’s nuclear tests



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Boeing WC-135 Constant Phoenix “sniffer plane” used to monitor radioactive emissions from nuclear bomb tests.
US Air Force/Staff Sgt. Christopher Boitz

Kaitlin Cook, Australian National University

On Sunday, North Korea claimed it had completed its sixth nuclear test – a hydrogen bomb.

This test was performed underground by the notoriously secretive regime. So, how can the international community know the state news agency was telling the truth?

The 6.3 magnitude tremor tells us there was an explosion Sunday. But to know this was a nuclear test, we have to detect the signature of a nuclear explosion.


Read More: Trump can’t win: the North Korea crisis is a lose-lose proposition for the US


Nuclear weapons either produce energy through nuclear fission (fission bombs) or a combination of fission and fusion (thermonuclear or hydrogen bombs). In both cases, nuclear reactions with neutrons cause the uranium or plutonium fuel to fission into two smaller nuclei, called fission fragments. These fragments are radioactive, and can be detected by their characteristic decay radiation.

If we detect these fission fragments, we know that a nuclear explosion occurred. And that’s where “sniffer” planes come in.

Nuclear fission and fusion.

Enter ‘sniffer’ planes

Since 1947, the United States Air Force has operated a nuclear explosions detection unit.

The current fleet uses the WC-135 Constant Phoenix. The aircraft fly through clouds of radioactive debris to collect air samples and catch dust. By measuring their decay, fission fragments can be detected in minute quantities.

The crew are kept safe using filters to scrub cabin air. Radiation levels are monitored using personal measuring devices for each crew member.

A WC-135 Constant Phoenix from the 45th Reconnaissance Squadron taxis in on the flightline.
US Airforce/Staff Sgt. Christopher Boitz

Sniffer planes like Constant Phoenix can be rapidly deployed soon after a reported nuclear test and have been used to verify nuclear tests in North Korea in the past.

This year, Constant Phoenix has reportedly been deployed in Okinawa, Japan and has had encounters with Chinese jets.

On the ground, the Comprehensive Test Ban Treaty Organisation (CTBTO) operates 80 ground-based monitoring stations across the globe that constantly monitor the air for fission products that have dispersed through the atmosphere.

Japan and South Korea operate their own radiation monitoring networks. These networks will also presumably be looking for signatures of the latest North Korean test.

CTBTO radiation monitoring system.

What can fission fragments tell us?

When a nuclear test occurs underground, the fission fragments are trapped except for noble gasses.

Because noble gasses don’t react chemically (except in extreme cases), they diffuse through the rock and eventually escape, ready to be detected.

In particular, some radioactive isotopes of the chemical element xenon are useful due to the fact these isotopes of xenon don’t appear in the atmosphere naturally, have decay times that are neither too long nor too short, and are produced in large quantities in a nuclear explosion. If you see these isotopes, you know a nuclear test occurred.

Something happened during this test that has people excited — there was an additional magnitude 4.1 tremor around eight minutes after the initial tremor, according to the United States Geological Survey. Among other things, this may indicate that the tunnel containing the bomb collapsed. If this happened, then other fission products and other radioactive isotopes could escape as dust particles.

This might have been accidental or deliberate (to provide proof to international viewers), but in either case, we may learn a lot, depending on how fast the sniffer planes arrived and how much dust was released.

For example, by looking at the probability of seeing fission fragments with different masses, the composition of the fission fuel could be determined. We could also learn about the composition of the rest of the bomb. These facts are things that nuclear states keep very secret.

Crucially, by looking for isotopes that could only be produced in a high intensity high energy neutron flux, we could suggest whether or not the bomb was indeed a hydrogen bomb.

What can’t they tell us?

The amount of information a sniffer plane can determine depends on how much material was released from the test site, how quickly it was released (due to nuclear decay) and how rapidly the sniffer plane got into place.

But fission fragment measurements probably can’t tell us whether the bomb tested was small enough to fit on an Intercontinental Ballistic Missile (ICBM). After all, it’s easy enough for North Korea to show a casing in a staged photograph and blow up something else.


Read More: North Korea panics the world, but ‘H-bomb’ test changes little


Whether or not North Korea has a thermonuclear device that is capable of being mounted to an ICBM is a question weighing heavily on the minds of the international community.

The ConversationSniffer planes and the CTBTO network will be wringing all of the data they can out of the debris in the atmosphere to help the world understand the nuclear threat from North Korea.

Kaitlin Cook, Postdoctoral Fellow, Department of Nuclear Physics, Australian National University

This article was originally published on The Conversation. Read the original article.

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Could you pass the proposed English test for Australian citizenship?



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English language tests will be used to decide Australian citizenship.
from shutterstock.com

Misty Adoniou, University of Canberra

The Australian government is proposing tough new English language competency requirements for those seeking Australian citizenship.

Alongside a test of Australian values, and proof of your integration into Australian society, you’ll need to prove you can read, write and speak English at a competent level

We’ve been here before

Question: What do these two excerpts have in common – besides their clumsy sentence structure?

  1. If the land is ploughed when wet the furrows may, and in all probability will, wear a more finished appearance, and will be more pleasant to the eye, but land so ploughed will be more inclined to become set or baked, and when in this state will not produce a maximum yield.

  2. By carefully preplanning projects, implementing pollution control measures, monitoring the effects of mining and rehabilitating mined areas, the coal industry minimises the impact on the neighbouring community, the immediate environment and long-term land capability.

Answer: They are both language tests used to decide Australian citizenship.

The first is a 50 word dictation test that was key to the White Australia Policy. It was used to keep non-Europeans out of Australia.

Even if you passed the test in English, the immigration officer had the right to test you again in another European language. It was used from 1901 until 1958.

The second one is 50 words from a 1000 word reading comprehension exam with 40 questions that you must complete in 60 minutes.

This test is key to Australia’s proposed new Citizenship test. You must also write two essays, do a 30 minute listening test and a 15 minute speaking exam. If it passes through Parliament this week, it will be used from 2017.

Aspiring Australian citizens will need to score a Band 6 on the general stream of the International English Language Testing System (IELTS) test, the same score as those seeking entry to Australia’s top university.

So, could you pass the test?

The reading test

You have 60 minutes to read at least four texts taken from magazines, newspapers or training manuals, and answer 40 comprehension questions. Your short answer responses are also assessed for grammar and spelling. Here is an excerpt from a piece about bee behaviour.

The direction of the sun is represented by the top of the hive wall. If she runs straight up, this means that the feeding place is in the same direction as the sun. However, if, for example, the feeding place is 40 degrees to the left of the sun, then the dancer would run 40 degrees to the left of the vertical line.

Try the test for yourself.

The writing test

You have 60 minutes to complete two writing tasks. For example,

Write a letter to the accommodation officer complaining about your room mate and asking for a new room.

You are marked on the length of your response, its cohesion, vocabulary and grammar.

To give you something to gauge yourself by, this one didn’t achieve the required score of 6. It begins,

Dear Sir/Madam, I am writing to express my dissatisfaction with my room-mate. As you know we share one room, I can not study in the room at all any more if I still stay there.

As Senator Penny Wong observed about the test,

“Frankly if English grammar is the test there might be a few members of parliament who might struggle.”

Currently our national school test results from NAPLAN show that 15.3% of Year 9 students are below benchmark in writing. This means they would not achieve a Band 6 on the IELTS test.

A fair test?

I prepared students for the IELTS test when I lived and taught in Greece. They needed a score of 6 to get into Foundation courses in British universities. It wasn’t an easy test and sometimes it took them more than one try to succeed.

My students were middle class, living comfortably at home with mum and dad. They had been to school all their lives and were highly competent readers and writers in their mother tongue of Greek.

They had been learning English at school since Grade 4, and doing private English tuition after school for even longer. Essentially they had been preparing for their IELTS test for at least 8 years.

They were not 40-year-old women whose lives as refugees has meant they have never been to school, and cannot read and write in their mother tongue.

Neither were they adjusting to a new culture, trying to find affordable accommodation and a job while simultaneously dealing with post-traumatic stress and the challenge of settling their teenage children into a brand new world.

Learning a language takes time

Even if we conclude that tests about dancing bees and recalcitrant room-mates are fit for the purpose of assessing worthiness for citizenship – and that is surely very debatable – we must acknowledge that it is going to take a very long time for our most vulnerable aspiring citizens to reach a proficiency that will enable them to pass the test.

Currently we offer them 510 hours of free English tuition. That is at least 5 years short of what the research says is required to reach English language competency.

Testing English doesn’t teach it

The three ingredients of successful language learning are motivation, opportunity and good tuition.

The Australian government must address all three if it wishes to increase the English language proficiency of its citizens.

An English language test may appear to be a compelling motivation to learn the language, but without the opportunity to learn and excellent tuition over time, the test is not a motivation. It is an unfair barrier to anyone for whom English is not their mother tongue.

The ConversationAnd then this new policy starts to look and feel like Australia’s old White Australia Policy.

Misty Adoniou, Associate Professor in Language, Literacy and TESL, University of Canberra

This article was originally published on The Conversation. Read the original article.

English language bar for citizenship likely to further disadvantage refugees



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Prime Minister Malcolm Turnbull has proposed tougher language requirements for new citizenship applicants.
Lukas Coch/AAP

Sally Baker, University of Newcastle and Rachel Burke, University of Newcastle

Citizenship applicants will need to demonstrate a higher level of English proficiency if the government’s proposed changes to the Australian citizenship test go ahead. The Conversation

Applicants will be required to reach the equivalent of Band 6 proficiency of the International English Language Testing System (IELTS).

To achieve Band 6, applicants must correctly answer 30 out of 40 questions in the reading paper, 23 out of 40 in the listening paper, and the writing paper rewards language used “accurately and appropriately”. If a candidate’s writing has “frequent” inaccuracies in grammar and spelling, they cannot achieve Band 6

Success in IELTS requires proficiency in both the English language, and also understanding how to take – and pass – a test. The proposed changes will then make it harder for people with fragmented educational backgrounds to become citizens, such as many refugees.

How do the tests currently work?

The current citizenship test consists of 20 multiple-choice questions in English concerning Australia’s political system, history, and citizen responsibilities.

While the test does not require demonstration of English proficiency per se, it acts as an indirect assessment of language.

For example, the question: “Which official symbol of Australia identifies Commonwealth property?” demonstrates the level of linguistic complexity required.

The IELTS test is commonly taken for immigration purposes as a requirement for certain visa categories; however, the designer of IELTS argues that IELTS was never designed for this purpose. Researchers have argued that the growing strength of English as the language of politics and economics has resulted in its widespread use for immigration purposes.

Impact of proposed changes

English is undoubtedly important for participation in society, but deciding citizenship based on a high-stakes language test could further marginalise community members, such as people with refugee backgrounds who have the greatest need for citizenship, yet lack the formal educational background to navigate such tests.

The Refugee Council of Australia argues that adults with refugee backgrounds will be hardest hit by the proposed language test.

Data shows that refugees are both more likely to apply for citizenship, and twice as likely as other migrant groups to have to retake the test.

Mismatched proficiency expectations

The Adult Migrant English Program (AMEP), where many adult refugees access English learning upon arrival, expects only a “functional” level of language proficiency.

For many adult refugees – who have minimal first language literacy, fragmented educational experiences, and limited opportunities to gain feedback on their written English – “competency” may be prohibitive to gaining citizenship. This is also more likely to impact refugee women, who are less likely to have had formal schooling and more likely to assume caring duties.

Bar too high?

The challenges faced in re/settlement contexts, such as pressures of work and financial responsibilities to extended family, often combine to make learning a language difficult, and by extension,
prevent refugees from completing the citizenship test.

Similar patterns are evident with IELTS. Nearly half of Arabic speakers who took the IELTS in 2015 scored lower than Band 6.

There are a number of questions to clarify regarding the proposed language proficiency test:

  • Will those dealing with trauma-related experiences gain exemption from a high-stakes, time-pressured examination?

  • What support mechanisms will be provided to assist applicants to study for the test?

  • Will financially-disadvantaged members of the community be expected to pay for classes/ materials in order to prepare for the citizenship test?

  • The IELTS test costs A$330, with no subsidies available. Will the IELTS-based citizenship/ language test attract similar fees?

There are also questions about the fairness of requiring applicants to demonstrate a specific type and level of English under examination conditions that is not required of all citizens. Those born in Australia are not required to pass an academic test of language in order to retain their citizenship.

Recognising diversity of experiences

There are a few things the government should consider before introducing a language test:

1) Community consultation is essential. Input from community/ migrant groups, educators, and language assessment specialists will ensure the test functions as a valid evaluation of progression towards English language proficiency. The government is currently calling for submissions related to the new citizenship test.

2) Design the test to value different forms and varieties of English that demonstrate progression in learning rather than adherence to prescriptive standards.

3) Provide educational opportunities that build on existing linguistic strengths that help people to prepare for the test.

Equating a particular type of language proficiency with a commitment to Australian citizenship is a complex and ideologically-loaded notion. The government must engage in careful consideration before potentially further disadvantaging those most in need of citizenship.

Sally Baker, Research Associate, Centre of Excellence for Equity in Higher Education, University of Newcastle and Rachel Burke, Lecturer, University of Newcastle

This article was originally published on The Conversation. Read the original article.

A ‘tougher’ citizenship test should not be used to further divide and exclude


Alex Reilly, University of Adelaide and Mary Anne Kenny, Murdoch University

Immigration Minister Peter Dutton recently raised the prospect of changing the law around acquiring Australian citizenship.

He acknowledged the vast majority of migrants are well-integrated, and should be fast-tracked for citizenship. However, Dutton would like to see criteria tightened to deny citizenship to those who have not integrated into Australia. While details are unclear, he referred to people involved in serious crime, those who are welfare-dependent, or who have links with extremism.

Dutton was also concerned about people who don’t undertake English lessons or prevent their children from being educated.

What’s the point of citizenship?

Permanent residents in Australia enjoy almost the full range of civil and political rights as citizens. They have access to the welfare system (after initial waiting periods), Medicare, and education.

Citizens alone are able to vote and have a greater security of residence. They are subject to removal only if they have fought for the armed forces of an enemy country or, since 2014, if they are involved in activity defined to be linked with terrorism.

Citizenship is important for people to feel fully connected and committed to Australia. For some – in particular refugees – the increased security of residence is of extremely high importance, given they are unable to return to their countries of origin for fear of persecution.

For those who came to Australia by boat, citizenship is the only pathway to sponsoring family members to join them.

The pathway to citizenship

Citizenship is the final step in a process of becoming a full member of the Australian community. There are many checks along the way.

When Australia admits permanent residents, the expectation is that they will stay permanently and take up citizenship at some point in the future. When permanent residents become citizens it is a marker of their successful integration.

Knowing that permanent residents are likely to be future citizens, Australia makes difficult policy choices around the balance of skilled, family reunion and humanitarian migration.

The government sets a target for the maximum number of new residents each year, and visa-holders are subject to rigorous checks to ensure they meet the criteria for those visas. These checks include detailed security and character assessments.

By the time a permanent resident is in a position to apply for citizenship, they must have lived in Australia for four years and have remained of good character during that time. If they do not remain of good character, their visa may be cancelled and they can be removed to their country of origin.

The immigration minister regularly exercises this power – even, controversially, in relation to long-term permanent residents with children in Australia.

Also, as part of eligibility for citizenship, a person must be of “good character” and must provide national police checks. The Department of Immigration can also request Interpol and overseas police checks.

Are citizenship tests the best way?

In 2007, the Howard government introduced a citizenship test to help determine whether applicants satisfied two further requirements for citizenship. They must have:

  • a “basic knowledge” of English; and

  • “an adequate knowledge of Australia and of the responsibilities and privileges of Australian citizenship”.

Citizenship tests are not well-suited to testing an applicant’s “values”. They are also a crude measure of an applicant’s level of English.

Australia’s test no longer contains questions about cricketer Don Bradman, after it was reviewed in 2008. It now focuses on knowledge of the institutions of government, and of basic constitutional values such as free speech.

Being able to rote learn these values is not an indication that a person lives by them. And the language of values and rights is complicated, and not a useful test of basic English literacy skills.

Can we test for ‘integration’?

Questions remain as to whether it is possible to test for successful integration into Australia.

A recent Productivity Commission report framed integration as both economic integration and social inclusion. It is not just the skills and efforts of individual migrants that are key to promoting integration, but the societal attitudes, and government policies and programs that support settlement and removing barriers to integration.

The most important benefit of citizenship for migrants is the sense of inclusion and acceptance into their adopted community. Requirements for citizenship should therefore promote inclusion, not exclusion.

Discussions that focus on exclusion have the potential to alienate sectors of the community. They are a hindrance to people obtaining a sense of connection in Australia.

As Dutton observed, there are good reasons to encourage permanent residents to take up citizenship: for one, it enhances their integration in the community.

To the extent that poor English and poor understanding of Australian values is a barrier to this integration, the government needs to increase its efforts to educate prospective citizens – not look for ways to exclude them.

The Conversation

Alex Reilly, Deputy Dean and Director of the Public Law and Policy Research Unit, Adelaide Law School, University of Adelaide and Mary Anne Kenny, Associate Professor, School of Law, Murdoch University

This article was originally published on The Conversation. Read the original article.

Cricket: Ashes Report – 20 July 2013


The first two days of the Ashes second test at Lords are over and it would appear that England are on track for a 5 nil whitewash of the series. Australia are terrible – poor bowling at times and abominable batting. It is difficult to see how Australia can compete in this Ashes series, let alone this test match.




Cricket: Shane Watson to Captain Australia


Michael Clarke has been ruled out of the fourth test against India which starts today. Shane Watson will captain the team in what is likely to be another loss. The link below is to an article reporting on the elevation of Watson to captain.

For more visit:
http://www.smh.com.au/sport/cricket/watson-named-australian-captain-as-clarke-ruled-out-20130322-2gkfu.html

Cricket: Australia – Australia Defeat India 4 Zip and the Big Bash 2012 Final


What a great day for Australian Cricket, with Australia wrapping up the test series against India 4 – 0 and the hugely successful 1st season of the Twenty20 Big Bash being completed tonight, with the Sydney Sixers defeating the Perth Scorchers.

It has been a massive day of cricket, with Michael Clarke, Ricky Ponting, David Warner, Peter Siddle and Co, playing great cricket in the series win against India. Who will forget the massive triple century of Michael Clarke, the partnerships of Clarke and Ponting, the dominance of Australia’s bowling attack and the capitulation of the Indian team under relentless pressure from Australia. Both Shaun Marsh and Brad Haddin should be concerned about their immediate future in the team, with poor performances by them both throughout the series. Both Ponting and Michael Hussey silenced their critics with very solid performances in the series and David Warner has cemented his place in the team for the time being.

India however were very disappointing and several big name players should be looking at retirement – if not, they should perhaps be replaced. All the big names struggled, none more than Dravid and Laxman. Even Sachin Tendulkar struggled and at no time did it seem likely he would make his 100th international hundred.

The Big Bash Final win for the Sydney Sixers was set up right from the beginning with a brilliant first over by Brett Lee. It was a brilliant opening partnership between Moses Henriques and Steve O’Keefe that ensured the Sixers could chase down the total set by the Scorchers comfortably.

For more visit:
http://www.cricket.com.au/news-list/2012/1/28/australia-seal-whitewash

http://www.bigbash.com.au/
http://www.espncricinfo.com/big-bash-league-2011/content/story/551379.html

Muslim Boys in Pakistan Accused of Raping Christian Girl


DNA results match their semen samples in case filed by family of fatherless 14-year-old.

LAHORE, Pakistan, June 3 (CDN) — Forensic DNA results of semen samples in a sexual assault case show they match those of the Muslim boys a 14-year-old Christian girl accuses of raping her, according to advocacy organizations.

The girl accuses Muhammad Noman and Muhammad Imran, both 17, of abducting her from her school in Kamboh colony, Lahore, in Punjab Province, on May 6 and drugging her prior to sexually assaulting her, according to Khalid Gill, president of the Christian Lawyers Foundation (CLF), and officials of the National Commission of Justice and Peace (NCJP).

The minor, whose name was withheld, told the organizations that she was waiting for her younger sister at the main gate of S.M. Foundation School after class hours when Noman and Imran told her that a girl named Hira wanted to see her.

The girl said that she told them she was not familiar with anyone named Hira, but that she was not afraid because there was no problem meeting a girl. She told the NCJP that as she stepped off the school grounds, Noman and Imran overpowered her, tightly covering her mouth to stifle her cries for help. Later they gagged her with a band of cloth.

NCJP General Secretary Peter Jacob reported that they took her by motorbike to a place unknown to her and compelled her to consume a soft drink containing tranquilizers. Able to see but unable to move as she began to lose consciousness, she was unable to stop them as each boy raped her, she told the NCJP. She said she later became totally unconscious.

The CLF’s Gill said the boys later left her on a road near the school’s main entrance.

The girl’s father, Rehmat Masih, is deceased. Her mother, Aysha Bibi, said that she had fearfully begun searching for her and had contacted a school administration official, who said that her daughter had left the school on foot. Several Christian neighbors also participated in the search.

Christian neighbor Shehzad Masih found her unconscious on the road near the school gate and brought her home, according to the NCJP’s Jacob. As the 14-year-old regained consciousness, her mother and others brought her to the Millat Park Police Station and filed an application to register a case against Noman and Imran.

After investigating, on May 9 Millat Park Police registered a case against Noman and Imran for abducting “with intent to commit adultery.”

Although Muslims commonly commit crimes against Christians in Pakistan assuming law enforcement officials will not prosecute, the two boys were arrested on May 26. Police sent DNA samples of the semen of both Muslim youths to a forensic laboratory, and the results linking them to the crime returned this week, CLF and NCJP’s Jacob said.  

A urine test indicated the girl was not pregnant, CLF and NCJP officials said.

Report from Compass Direct News