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Topological Phases of Matter and Quantum Computation

Paul Bruillard, Carlos Ortiz Marrero and Julia Plavnik, editors. American Mathematical Society, 2020, CONM, volume 747, approx. 240 pp. ISBN: 978-1-4704-4074-9 (print), 978-1-4704-5457-9 (online).

This volume contains the proceedings of the AMS Special Session on Topological Phases of Matter and Quantum Computation, held from September...




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North Korean elite increasingly turning to VPNs, Tor

While only a small group of North Koreans have access to the global internet, usage patterns are changing among the elites of Pyongyang – with those in military intelligence circles now exhibiting stronger security chops, a report from Recorded Future has found




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Babylon Health releases coronavirus Care Assistant

Telehealth and GP service Babylon has rolled out a "COVID-19 Care Assistant" with a raft of features designed to help subscribers cope with symptoms during the pandemic, from the safety of their phone screen




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CapitalRise reassesses its mission amidst Brexit and regulation change

The proptech startup wanted to democratise investment in prime real estate projects through crowdfunding, but government regulations have limited its reach to high net worth individuals






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Uniqueness for the inverse boundary value problem of piecewise homogeneous anisotropic elasticity in the time domain

Cătălin I. Cârstea, Gen Nakamura and Lauri Oksanen
Trans. Amer. Math. Soc. 373 (2020), 3423-3443.
Abstract, references and article information




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Tech startups cashing in on cannabis




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Best tech podcasts 2020




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Fun Raspberry Pi projects for beginners




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Learn to code with these classroom-based UK coding courses




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Reasons why you should work for a startup




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RNLI Severn Class

peterphotographic posted a photo:

Airfix 1:72 RNLI Severn Class - Plymouth Lifeboat

Walthamstow, East London, UK




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Wyandotte Douglas DC-2

dlberek posted a photo:




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Tootsietoy Douglas DC-2s

dlberek posted a photo:




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Wyandotte and Tootsietoy Douglas DC-2s

dlberek posted a photo:




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Approximation of solutions of the wave equation driven by a stochastic measure

V. M. Radchenko and N. O. Stefans’ka
Theor. Probability and Math. Statist. 99 (2020), 229-238.
Abstract, references and article information




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Calculation of the convexity adjustment to the forward rate in the Vasicek model for the forward in-arrears contracts on LIBOR rate

N. O. Malykh and I. S. Postevoy
Theor. Probability and Math. Statist. 99 (2020), 189-198.
Abstract, references and article information




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Asymptotic distribution of the maximum likelihood estimator in the fractional Vašíček model

S. S. Lohvinenko and K. V. Ralchenko
Theor. Probability and Math. Statist. 99 (2020), 149-168.
Abstract, references and article information




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Goodness-of-fit test in the Cox proportional hazards model with measurement errors

A. G. Kukush and O. O. Chernova
Theor. Probability and Math. Statist. 99 (2020), 125-135.
Abstract, references and article information




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On the lack of memory for distributions of overshoot functionals in the case of upper almost semicontinuous processes defined on a Markov chain

D. V. Gusak and E. V. Karnaukh
Theor. Probability and Math. Statist. 99 (2020), 77-89.
Abstract, references and article information




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Persistence and extinction in a stochastic nonautonomous logistic model of population dynamics

O. D. Borysenko and D. O. Borysenko
Theor. Probability and Math. Statist. 99 (2020), 67-75.
Abstract, references and article information




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Modified Euler scheme for the weak approximation of stochastic differential equations driven by the Wiener process

S. V. Bodnarchuk and O. M. Kulyk
Theor. Probability and Math. Statist. 99 (2020), 53-65.
Abstract, references and article information






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A borderline case of Calderón–Zygmund estimates for nonuniformly elliptic problems

C. De Filippis and G. Mingione
St. Petersburg Math. J. 31 (2020), 455-477.
Abstract, references and article information




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Corrigendum to “The Łojasiewicz exponent of a continuous subanalytic function at an isolated zero”

Phạm Tiến Sơn
Proc. Amer. Math. Soc. 148 (2020), 2739-2741.
Abstract, references and article information





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Classical solution of a PDE system stemming from auxin transport model for leaf venation

Bin Li and Jieqiong Shen
Proc. Amer. Math. Soc. 148 (2020), 2565-2578.
Abstract, references and article information







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A topology on the set of isomorphism classes of maximal Cohen–Macaulay modules

Naoya Hiramatsu and Ryo Takahashi
Proc. Amer. Math. Soc. 148 (2020), 2359-2369.
Abstract, references and article information





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Ship's last HK passenger back home

The Security Bureau today said that the last Hong Kong resident who had contracted COVID-19 while aboard the Diamond Princess cruise ship and was hospitalised in Japan has returned to Hong Kong.

 

Immigration Department staff that assisted Hong Kong residents in Japan have completed their mission and returned to Hong Kong as well.

 

In early February, a cluster of COVID-19 infection cases occurred on the Diamond Princess cruise docked in Yokohama.

 

Of some 3,700 passengers and crew, about 370 were from Hong Kong. The 712 confirmed COVID-19 cases associated with the cruise included 76 Hong Kong residents who were hospitalised in Japan for isolation and treatment.

 

While three Hong Kong residents passed away, the remaining 73 patients returned to Hong Kong or their places of residence after being discharged from the hospital.

 

As for other Hong Kong residents on the cruise, the bureau noted that the Hong Kong Special Administrative Region Government arranged three flights, between February 19 and 23, to escort 193 of them back to the city.

 

Upon arrival, they were transferred to the quarantine centre at Chun Yeung Estate to undergo 14 days of quarantine.

 

Another 144 Hong Kong residents returned on their own via other flights, including 25 close contacts of the patients who had completed quarantine in Japan.

 

For those who returned to Hong Kong on their own and did not complete 14 days of quarantine in Japan, they were required to complete the remaining quarantine period at a quarantine centre.

 

Of the 231 cruise passengers admitted to the quarantine centre at Chun Yeung Estate, nine tested positive for COVID-19 and were sent to hospitals for isolation and treatment.

 

The Hong Kong SAR Government expressed profound condolences on the passing of the Hong Kong patients and its deepest sympathies to their families.

 

The SAR Government emphasised that the incident could not have been resolved smoothly without the staunch support of the Office of the Commissioner of the Ministry of Foreign Affairs of the People's Republic of China in the Hong Kong Special Administrative Region, the Embassy of the People’s Republic of China in Japan and Japanese authorities.

 

The SAR Government also thanked Cathay Pacific Airways and the Airport Authority for their assistance, the bureau added.




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Arrests based on evidence

The Security Bureau said Police have the duty to take lawful measures for apprehending people when sufficient grounds exist.

 

The bureau issued the statement in response to media inquiries regarding a number of people arrested by Police today in connection with organising and participating in unauthorised assemblies.

 

It emphasised that under the Police Force Ordinance, Police have the duty to take lawful measures for apprehending all persons whom it is lawful to apprehend and for whose apprehension sufficient grounds exist.

 

The bureau noted that the relevant arrests were made based on evidence from investigations and strictly according to the laws in force.

 

It pointed out that in Hong Kong, everyone is equal before the law and that no one is above it nor can break it without facing consequences.

 

The bureau explained that if there is evidence that anyone violates the law, regardless of their status or background, they must face justice. No one has any special privileges.

 

Police will handle the case in a fair, just and impartial manner in accordance with the law, it added.




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Treasure judicial independence: SJ

In recent times, criminal damage has been repeatedly inflicted on our court buildings through graffiti. Some went as far as making derogatory remarks against specific judges which may amount to contempt of court. It is bewildering as to what such acts could achieve except a futile attempt to undermine the very core value that we cherish and respect.

 

Judicial independence is the key building block to our society. These rampant acts and statements, and for that matter, any views expressed in society or media, would not in any way usurp the decision-making process in court proceedings, nor will they affect our judicial independence as our judges will continue to decide cases based only on evidence and law, setting out how they have arrived at such decisions in their judgments, which are available to the general public. They have taken a judicial oath to administer justice without fear or favour and it is their duty to so do.

 

Judges in Hong Kong are appointed upon the recommendation by a statutory committee comprising nine members including the Chief Justice of the Court of Final Appeal, the Secretary for Justice, two judges from the Judiciary, one barrister and one solicitor, as well as three eminent and respected members of the society not connected with the practice of law. Our judges would not be subjected to any political vetting. The only criteria upon which they are considered before appointment is the judicial and professional quality that contributes to our renowned judicial independence.

 

Judges enjoy security of tenure and immunity. Upon the appointment, district court judges and above are precluded from returning to practice in Hong Kong as a barrister or a solicitor. This “non-revolving door” system has worked well in preventing perceived potential conflicts of interest and enhances the independence of our judiciary.

 

Our judges manifest the highest professional and judicial quality as well as impartiality through the reasoned judgments that they deliver. Hong Kong cases are often cited in overseas jurisprudence evidencing the confidence and respect of the global legal community in Hong Kong’s judicial and legal systems.

 

The institutional framework described above, the guarantee of judicial independence explicitly set out in the Basic Law and the quality of our judgments contribute to the much respected judiciary and rule of law in Hong Kong. To top it all is that eminent and highly respected judges from apex court of other common law jurisdictions sit on our Court of Final Appeal as non-permanent judges. They sit on all types of cases, from commercial, criminal to constitutional and have witnessed Hong Kong’s system in administering justice.

 

One of our non-permanent judges of the Court of Final Appeal, the Right Honourable the Lord Neuberger of Abbotsbury (former President of the Supreme Court of England and Wales who presided over the Brexit case), pointed out in a seminar in 2017 that his own direct experience as a non-permanent judge since 2010 proved that the Permanent Judges of the Court of Final Appeal are as institutionally independent and impartial. He also said that he has every reason to believe that this is equally true of the judges in the other courts of Hong Kong. He even said he would not be sitting in the Court of Final Appeal if he had any serious concerns about judicial independence or judicial impartiality in Hong Kong.

 

More recently, the Right Honourable Beverley McLachlin, PC, another non-permanent judge of the Court of Final Appeal and also a retired chief justice of Canada, described in an interview that Hong Kong’s law is very rigorously applied, the judges are of high calibre, it is a very high level of judging, and the court is independent.

 

These remarks from eminent and respected judges from around the world speak volume about Hong Kong. One cannot help but be perplexed as to why some chose to try to undermine these core values baselessly and insidiously. It behoves each of us, in particular the legal sector including the two branches of the legal profession, to protect our judicial independence that underpins Hong Kong’s success and encourage others to join hands through our own sphere of influence. It is high time we bring back the Hong Kong we are familiar with.

 

Secretary for Justice Teresa Cheng wrote this article and posted it on her blog on January 5.




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Concerted efforts to fight the disease

Last month, I paid a visit to Yuen Long where I met a few families at Long Shin Estate. Apart from distributing face masks and anti-epidemic supplies to them, I was also given a better understanding of the impact brought by the epidemic on their daily lives. To show our concerted support in the fight against the disease, the Department of Justice (DoJ) Staff Club organised a volunteer activity on Sunday, which I joined with my fellow colleagues in offering our help to those in need.

 

To echo the Government's move to stay united, the DoJ Staff Club put forth a cash contribution campaign to buy anti-epidemic supplies for donation. The staff club volunteers acquired face masks and alcohol-based handrub in different ways - some were purchased through online shopping and some were bought at medicine stores. Last Sunday, I joined the volunteers in packing the anti-epidemic supplies, supermarket cash coupons and leaflets with health information. Our volunteers took the care packs in person to a non-governmental organisation a few days ago for passing to the elderly and low-income groups.

 

The staff club has been participating in volunteer services now and then. Given the overwhelming response this time, I am glad to know that more volunteer activities would be organised in the future. I would definitely be joining as many as I could. Through offering our efforts to help those in need, we hope to show our care for the less privileged in society and contribute to building a caring and inclusive community.

 

The public services of the DoJ, like all other government departments, have gradually resumed back to normal. I inspected the Justice Place on Monday to learn more about the infection control measures in place, such as the body temperature checking arrangement, provision of hand sanitisers and sanitising mats at building entrances.

 

We must remain vigilant as the epidemic is still severe, and more importantly, we also need to stand in solidarity in the fight against the disease.

 

Secretary for Justice Teresa Cheng wrote this article and posted it on her blog on March 5.




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Basic Law underpins HK’s success

On April 4, 1990, the Basic Law of the Hong Kong Special Administrative Region of the People’s Republic of China was adopted by the Seventh National People’s Congress (NPC) of the People’s Republic of China (PRC). The Basic Law enshrines the basic policies of the PRC regarding the Hong Kong Special Administrative Region (HKSAR) and provides a solid constitutional basis for the implementation of “one country, two systems”. Looking back, we must not forget the purpose and mission of the Basic Law.

 

The Basic Law clearly states that Hong Kong has been part of the territory of China since ancient times and is an inalienable part of the PRC. It is a Special Administrative Region enjoying a high degree of autonomy under the Central People’s Government. Upholding national unity and territorial integrity, maintaining the prosperity and stability of Hong Kong, and taking account of history and realities, the “one country, two systems” principle was put forth by Mr Deng Xiaoping as a way to preserve the characteristics and strengths of Hong Kong as much as possible and to enable Hong Kong citizens to maintain their way of life.

 

In the 22 years since her return to the motherland, Hong Kong has weathered different challenges and, on the whole, the implementation of “one country, two systems” has been successful. Leveraging on our strengths in free market economy, rule of law, independent judiciary and the free flow of information and with our country’s strong support, Hong Kong has developed into an international financial, trade and transportation centre and attracted more than 9,000 overseas and Mainland companies to establish offices here, with many of them making Hong Kong as their regional headquarters in Asia-Pacific.

 

International financial centre

Article 109 of the Basic Law confirms Hong Kong’s status as an international financial centre and stipulates that the Government of the Hong Kong Special Administrative Region shall provide an appropriate economic and legal environment for the maintenance of such status. Specifically, under the Basic Law:

 

- The Hong Kong dollar is the legal tender of the HKSAR and the linked exchange rate system has been maintained. With the strong support of the Central Government, Hong Kong has been able to maintain financial stability even during turbulent times. Riding on our country’s reform and opening up, Hong Kong has also developed into the world’s largest offshore renminbi centre.

 

 - The free flow of capital is protected and has attracted a large number of foreign direct investment and companies using Hong Kong as an ideal platform for initial public offerings and fundraising. Over the past 10 years, Hong Kong has topped the annual global IPO rankings six times.

 

- Hong Kong maintains a simple and low tax system, which is key to Hong Kong’s success as an international financial, trading and business centre. The Hong Kong Special Administrative Region Government is free to implement tax measures according to policy needs under its independent tax system. Since I took office, I have put in place initiatives such as the two-tier profits tax system and tax deduction for research and development expenditure to enhance Hong Kong’s competitiveness.

 

Rule of law and independent judiciary

The Basic Law preserves and guarantees Hong Kong’s long-established and trusted common law system and allows the HKSAR to enjoy independent judicial power, including that of final adjudication. The rule of law and an independent judiciary, which are held dearly by Hong Kong people, are constitutionally protected. The Basic Law stipulates that judges shall be appointed by the Chief Executive on the recommendation of an independent commission; for the appointment of judges of the Court of Final Appeal (CFA) and the Chief Judge of the High Court, the Chief Executive shall obtain the endorsement of the Legislative Council and report such appointment to the Standing Committee of the NPC for the record. Last month, I accepted the recommendation of the Judicial Officers Recommendation Commission to appoint the Honourable Justice Andrew Cheung, Permanent Judge of the CFA, to succeed The Honourable Chief Justice Geoffrey Ma who will retire next year.

 

The Basic Law also allows the CFA to draw on the experience of judges from other common law jurisdictions. Currently, 15 eminent judges from the United Kingdom, Australia and Canada are sitting on the CFA as non-permanent judges. Their participation shows that our rule of law and independent judiciary are well recognised.

 

Rights and freedoms of residents

The fundamental rights and freedoms of Hong Kong residents are fully protected by the Basic Law. Under Chapter 3, Hong Kong residents shall have freedom of speech, of the press and of publication; freedom of association, of assembly, of procession and of demonstration; freedom of the person; freedom of communication; freedom of religious belief; freedom of choice of occupation; freedom to engage in academic research, literary and artistic creation, and other cultural activities; freedom of marriage and so forth. However, as pointed out by our courts in their judgments, freedom is not absolute; one should respect the rights and freedoms of other people and be subject to law when exercising such freedoms.

 

Developing external affairs

Hong Kong has always been a bridge between the East and the West. The Basic Law allows the HKSAR to maintain and develop relations with foreign states and regions and relevant international organisations in the appropriate fields, including economic, trade, financial and monetary, shipping, communications, tourism, cultural and sports fields on its own, using the name Hong Kong, China. The HKSAR has participated in the World Trade Organization, the World Meteorological Organization, the Asia-Pacific Economic Cooperation and many others in the name Hong Kong, China and has entered into hundreds of bilateral agreements with other countries, including Free Trade Agreements, Investment Promotion & Protection Agreements and Comprehensive Double Taxation Agreements. Hong Kong athletes can also represent Hong Kong in international competitions.

 

The implementation of “one country, two systems” fully demonstrates that it is the best institutional arrangement to maintain Hong Kong’s long-term prosperity and stability. As a pioneering initiative, its application entails an evolving process and we have to effectively and fully apply this principle in order to maintain the prosperity and stability of Hong Kong, to meet the aspirations of our citizens and to meet the fundamental interests of our country. I encourage all Hong Kong citizens to learn more about the Basic Law, including the institutional safeguards, and the rights and duties of Hong Kong residents. In so doing, we should consider how best we can continue to leverage on Hong Kong’s advantages, allowing Hong Kong to advance with the country and enabling every Hong Kong resident to realise their goal.

 

Chief Executive Carrie Lam wrote this op-ed entitled The Basic Law - Best Safeguard for the Prosperity & Stability of Hong Kong on April 4.




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Banks to ease cashflow pressure

The banking sector today launched a scheme to alleviate the cashflow pressure faced by corporate customers in light of the economic challenges brought about by the COVID-19 outbreak.

 

Jointly announced by the Monetary Authority and the Banking Sector SME Lending Coordination Mechanism, the Pre-approved Principal Payment Holiday Scheme is estimated to cover more than 80% of all corporate borrowers in Hong Kong.

 

All corporate customers that have an annual sales turnover of $800 million or less and with no outstanding loan payments overdue for more than 30 days are eligible for the scheme.

 

Eligible customers’ loan principal payments due within a six-month period between May 1 and October 31 this year will be pre-approved for deferment.

 

The loans’ principal payments, including revolving facilities, will generally be deferred by six months, whereas trade facilities, given their short-term nature, will be deferred by three months.

 

The scheme does not cover syndicated loans or loans used for financing purchases of shares or other financial assets.

 

Banks will begin informing eligible customers of the pre-approval under the scheme as soon as practicable. Eligible customers do not need to apply. They only need to contact the bank within 14 days of the bank’s notice to confirm the detailed arrangements.

 

The authority has issued a circular requesting all banks to participate in the scheme and has received support from all 11 major lenders in the co-ordination mechanism.

 

It will monitor the scheme’s operation and maintain close dialogue with banks.




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Afghan treasures to be exhibited

Rare artefacts from Afghanistan will be on display at the Museum of History from November 6 until February 10, 2020.

 

Ancient Artefacts of Afghanistan - Glistening Treasures in the Dust will display 231 artefacts, including gold and glass wares, bronze sculptures and ivory carvings unearthed from four famous archaeological sites in Afghanistan.

 

Highlight exhibits include a golden bowl with a bearded-bull motif unearthed in Tepe Fullol and pendants with styles that were common in the Mesopotamian and Persian Plateau regions.

 

The precious relics are on loan from the National Museum of Afghanistan.

 

The museum’s director Mohammad Rahimi said that because Afghanistan borders many countries including China, the artefacts attest to the role ancient Afghanistan played as the cultural crossroads of the Silk Road.

 

“Afghanistan has been given the title of the crossroads of the ancient civilisation by different scholars of the world. So we had very good relations with different civilisations in the past so that’s why we can see a lot of influences of different cultures in our objects.”

 

Mr Rahimi added that Afghanistan is sharing its exhibit with Hong Kong as a gesture of goodwill and friendship and with the hope of strengthening relations with China.

 

“We have also seen different examples of our ancient relations with China. Because of that, we want to build on our relations with China through this exhibition and we have shown that we have had very good connections in the past.”

 

Many of the exhibits will be equipped with interactive designs so that visitors can compare and contrast the displayed treasures with similar artefacts.

 

Click here for details.




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Astronomical events exhibit set

The Space Museum is staging a special exhibition 2020 Astronomical Events to highlight six major astronomical events happening this year.

 

The events include grouping of the four planets with the moon in late March, the serial phenomena of Jupiter's moons on June 11 and 12, and the partial solar eclipse on June 21.

 

Information on the Perseid meteor shower in mid-August, the Geminid meteor shower in mid-December and the Jupiter-Saturn conjunction on December 21 will also be featured.

 

The exhibit explains details and phenomena of these events, while serving as a practical guide to help visitors pick the best dates, times, locations and tools to observe them.

 

It will run until September 21 in two phases. The first three events will be presented during the first phase from January to June, while the second phase events will be shown from June to September.

 

Admission is free.

 

Call 2721 0226 for enquiries.




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Offensive Words/Phrases: Who Should Know Better?

Required reading for any academic is Philip Roth’s “The Human Stain.” In the first few pages an older, tenured professor is “forced to retire.” Why? There were two students who never were present when he called roll. Even after roll … Continue reading




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Pretty as a Picture (Part I)




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Pretty as a Picture (Part II)




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More Measles




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Casting Round-Up

Carla Mooney lands role in spy thriller ‘Kickback’ opposite John Cusack, Stuart Townsend nabs multi-episode part in US TV show ‘Elementary’ and Jason Barry and Brian Robinson both to star in new feature ‘Murphy’ from Caspian Pictures.




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LandsD measures to aid enterprises

The Lands Department will provide additional rental or fee concessions for tenants of short-term tenancies (STT) and waiver holders in accordance with the new round of support measures announced earlier this month.

     

The measures aim to strengthen support for enterprises in light of the challenges arising from the COVID-19 epidemic.

 

In accordance with the support measures launched in 2019 and those announced in the 2020-21 Budget, STTs and waivers for varying the terms of land grants for business and community uses under the department have been granted 50% rental or fee concession from October 2019 to September this year.

 

Under the new round of support measures, the 5,000 eligible STT tenants and waiver holders already enjoying the previous concession, such as catering facilities, shops, workshops, public fee-paying car parks, and welfare facilities, will see their rental or fee concession rate increase to 75% from April to September.

     

The 75% concession arrangement will be extended to businesses not covered previously, such as depots for public transport operators, public utilities, petrol filling stations, driving schools and advertising facilities, effective for the same period.

     

If these tenants and waiver holders are ordered to close or have chosen to close due to the Government’s orders or other restrictions for safeguarding public health under the relevant regulation, they may further apply to the department for full rental or fee concession for the duration of the closure.

 

The department will issue written notifications to eligible STT tenants and waiver holders on the above concession measures and their implementation details.           

 

Additionally, to help development projects with construction progress affected by the epidemic, the department will offer extensions of the Building Covenant period at nil premium for up to six months for leases with the covenant not yet discharged as at April 8.

 

The department will issue a practice note and upload it onto its website by the end of the month to announce the application arrangements for lessees.