One hundred years ago, Pennsylvanian surgeon Evan Kane penned a brief letter to JAMA in which he declared himself a rigorous proponent of the “benefic [sic] effects of the phonograph within the operating room.” Now David Bosenquet, a surgeon from University Hospital of Wales in Cardiff has written a Christmas editorial about the evidence for the...

Waiting times in theatre can be a source of friction – but is the delay due to mandatory anaesthetic faff around time (MAFAT), or AWOL surgeons? Elizabeth Travis, and orthopaedic house officer in New Zealand and colleagues, have been trying to create and evidence base to argue the toss, and she joins me now to discuss her study, Operating...

Healthy self confidence has an important role in surgery, but what came first - the surgeon or the ego? In this conversation, Christopher Myers, Yemeng Lu-Myers, and Amir Ghaferi join us to talk about the (very few) surgeons who behave badly in theatre, and why that behaviour has persisted, and can be detrimental. Read their full...

Invitation Only Research Event

We aimed to assess the value of ¹¹C-choline PET in patients with primary hyperparathyroidism and negative or discordant results on ^99mTc-sestamibi imaging and neck ultrasound. Methods: Eighty-seven such patients were assessed and subsequently underwent parathyroidectomy. PET/CT image data were analyzed semiquantitatively using SUV_max and SUV ratios (target to contralateral thyroid gland and carotid artery). A positive PET/CT result was defined as focal uptake significantly higher than regular thyroid tissue. Ectopic foci were also considered positive. Inconclusive PET/CT cases were defined as a lesion with uptake equal to normal thyroid tissue. If no prominent or ectopic uptake was detectable, the PET/CT result was considered negative. Results: When dichotomizing the ¹¹C-choline PET/CT imaging results by defining lesions with both positive and inconclusive uptake as positive, we found 84 of 92 lesions (91.3%) to have true-positive uptake whereas 8 lesions (8.7%) had false-positive uptake. One lesion showed false-negative uptake; the sensitivity was 98.8%. The corresponding positive predictive value for lesions was 91.3%. The mean SUV_max was 6.15 ± 4.92 in 72 lesions with positive uptake (70 patients) and 2.96 ± 2.32 in 20 lesions with inconclusive uptake (18 patients). Conclusion: These results in a large group of patients indicate that ¹¹C-choline PET/CT is a promising tool for parathyroid adenoma localization when ultrasound and ^99mTc-sestamibi imaging yield negative or discordant results.

Caribbean Coffee Traders Limited, CCTL, is moving ahead with plans for a US$30-million bond placement, the proceeds from which it will likely use to expand the Starbucks chain it operates in three regional markets. The initial franchise agreement...

Invitation Only Research Event

Event participants

Professor Keun-Wook Paik, Associate Fellow, Energy, Environment and Resources Department, Chatham House
Chair: John Lough, Associate Fellow, Russia and Eurasia Programme, Chatham House

The project purpose is to ensure emissions reduction and resilience strategies, policies and decision-making - both in China and globally - are better informed by an evidence-based perspective on climate-change risks.

Presentación del reporte que refleja el contenido de encuentros del grupo de estudio sobre la migración México-Estados Unidos convocado por El Colegio de México y el Migration Policy Institute (MPI).

Over recent months, the number of Central American migrants apprehended at the U.S.-Mexico border has surged, presenting a critical challenge in the relationship between the two neighboring countries. Experts from a Study Group on U.S.-Mexico Migration convened by El Colegio de México and MPI discuss current trends, policies, and politics surrounding migration from the Northern Triangle of Central America and the U.S.-Mexico relationship, ways to improve U.S. and Mexican asylum systems, possible new approaches to labor migration, ways to address smuggling networks, and modernize border management.

Springfield, Virginia — The Drug Enforcement Administration announced that effective March 23, the DEA Call Center has temporarily suspended phone operations due to COVID-19 pandemic.

As the numbers of Central American migrants crossing into Mexico and the United States rises—putting migration front and center in the U.S.-Mexico relationship again—this event examines the opportunities for cooperation between the two countries, along with ways to improve U.S. and Mexican asylum systems, create new approaches to labor migration, address smuggling networks, and modernize border management.

An unannounced sweep of 98 convenience stores by U.S. immigration authorities—resulting in the arrest of 21 unauthorized workers—may signal a new approach to worksite enforcement under the Trump administration, moving away from a strategy of paper-based audits that resulted in higher employer fines and fewer worker arrests. This article explores worksite enforcement over recent decades.

Migration between Mexico and the United States has changed dramatically in recent years, but policies and political rhetoric in both countries have not always kept up. This report, which draws from discussions of a high-level Mexico-U.S. study group convened by MPI and El Colegio de México, explores this new migration reality and how the two governments could work more closely together to address shared policy challenges.

La migración entre México y Estados Unidos ha cambiado dramáticamente en los últimos años, pero las políticas y la retórica política en ambos países no se han actualizado a este contexto a la misma velocidad. Este reporte explora esta nueva realidad migratoria y cómo los dos gobiernos podrían trabajar juntos para abordar los desafíos de políticas públicas que tienen en común.

Brussels is searching for bright ideas on how to fix the Common European Asylum System. While recent EU-level legal reforms have stalled, this report examines the many innovative, operations-focused approaches Member States have used since the 2015-16 migration crisis to improve registration and reception systems, asylum case processing, and options for returning failed asylum seekers.

APPLICATION DEADLINE OCTOBER 15, 2019 The Operations, Information and Decisions Department at the Wharton School is seeking applicants for a full-time, tenure track, Assistant Professor faculty position in the area of decision-making. Our decision-making faculty is comprised of scholars with a diverse set of backgrounds and interests, and we encourage applicants with degrees in economics, […]

The post Professorship in decision making at Wharton, Operations, Information and Decisions (OID), University of Pennsylvania appeared first on Decision Science News.

"Gender in Air Operations (GiAO) promulgates a matter that needs to be formally articulated between major doctrinal reviews. The GiAO doctrine note seeks to inform and promote discussion on Air Force’s operational capability through integrating a gender perspective into Air Force’s doctrine to inform individual and collective training and the planning and conduct of operations."--Website.

Paris : J.-B. Baillière, 1870.

London : J. Churchill, 1865.

Berlin : S. Karger, 1908.

Koln : M. Du Mont-Schanberg, 1848.

Wien : Toeplitz & Deuticke, 1886.

Stuttgart : F. Enke, 1884.

Leipzig : Vogel, 1904.

Erlangen : F. Enke, 1874.

London : H.K. Lewis, 1891.

Stuttgart : F. Enke, 1895.

Tubingen : C.F. Osiander, 1820.

Xiufang Liu, Dehui Wang.

Source: Brazilian Journal of Probability and Statistics, Volume 33, Number 3, 638--673.

Abstract:
This paper discusses a $p$th-order dependence-driven random coefficient integer-valued autoregressive time series model ($operatorname{DDRCINAR}(p)$). Stationarity and ergodicity properties are proved. Conditional least squares, weighted least squares and maximum quasi-likelihood are used to estimate the model parameters. Asymptotic properties of the estimators are presented. The performances of these estimators are investigated and compared via simulations. In certain regions of the parameter space, simulative analysis shows that maximum quasi-likelihood estimators perform better than the estimators of conditional least squares and weighted least squares in terms of the proportion of within-$Omega$ estimates. At last, the model is applied to two real data sets.

This paper proposes a stochastic variant of the stable matching model from Rasulkhani and Chow [1] which allows microtransit operators to evaluate their operation policy and resource allocations. The proposed model takes into account the stochastic nature of users' travel utility perception, resulting in a probabilistic stable operation cost allocation outcome to design ticket price and ridership forecasting. We applied the model for the operation policy evaluation of a microtransit service in Luxembourg and its border area. The methodology for the model parameters estimation and calibration is developed. The results provide useful insights for the operator and the government to improve the ridership of the service.

Robert A. Vandermeulen, Clayton D. Scott.

Source: The Annals of Statistics, Volume 47, Number 5, 2704--2733.

Abstract:
When estimating finite mixture models, it is common to make assumptions on the mixture components, such as parametric assumptions. In this work, we make no distributional assumptions on the mixture components and instead assume that observations from the mixture model are grouped, such that observations in the same group are known to be drawn from the same mixture component. We precisely characterize the number of observations $n$ per group needed for the mixture model to be identifiable, as a function of the number $m$ of mixture components. In addition to our assumption-free analysis, we also study the settings where the mixture components are either linearly independent or jointly irreducible. Furthermore, our analysis considers two kinds of identifiability, where the mixture model is the simplest one explaining the data, and where it is the only one. As an application of these results, we precisely characterize identifiability of multinomial mixture models. Our analysis relies on an operator-theoretic framework that associates mixture models in the grouped-sample setting with certain infinite-dimensional tensors. Based on this framework, we introduce a general spectral algorithm for recovering the mixture components.

Ability to work with each other. In the loosely coupled environment of a service-oriented architecture, separate resources don't need to know the details of how they each work, but they need to have enough common ground to reliably exchange messages without error or misunderstanding. Standardized specifications go a long way towards creating this common ground, but differences in implementation may still lead to breakdowns in communication. Interoperability is when services can interact with each other without encountering such problems.

Kamran Kalbasi, Thomas Mountford.

Source: Bernoulli, Volume 26, Number 2, 1504--1534.

Abstract:
In this paper, we study the local times of vector-valued Gaussian fields that are ‘diagonally operator-self-similar’ and whose increments are stationary. Denoting the local time of such a Gaussian field around the spatial origin and over the temporal unit hypercube by $Z$, we show that there exists $lambdain(0,1)$ such that under some quite weak conditions, $lim_{n ightarrow+infty}frac{sqrt[n]{mathbb{E}(Z^{n})}}{n^{lambda}}$ and $lim_{x ightarrow+infty}frac{-logmathbb{P}(Z>x)}{x^{frac{1}{lambda}}}$ both exist and are strictly positive (possibly $+infty$). Moreover, we show that if the underlying Gaussian field is ‘strongly locally nondeterministic’, the above limits will be finite as well. These results are then applied to establish similar statements for the intersection local times of diagonally operator-self-similar Gaussian fields with stationary increments.

Yi Shen, Yizao Wang.

Source: Bernoulli, Volume 26, Number 1, 500--530.

Abstract:
We propose an aggregated random-field model, and investigate the scaling limits of the aggregated partial-sum random fields. In this model, each copy in the aggregation is a $pm 1$-valued random field built from two correlated one-dimensional random walks, the law of each determined by a random persistence parameter. A flexible joint distribution of the two parameters is introduced, and given the parameters the two correlated random walks are conditionally independent. For the aggregated random field, when the persistence parameters are independent, the scaling limit is a fractional Brownian sheet. When the persistence parameters are tail-dependent, characterized in the framework of multivariate regular variation, the scaling limit is more delicate, and in particular depends on the growth rates of the underlying rectangular region along two directions: at different rates different operator-scaling Gaussian random fields appear as the region area tends to infinity. In particular, at the so-called critical speed, a large family of Gaussian random fields with long-range dependence arise in the limit. We also identify four different regimes at non-critical speed where fractional Brownian sheets arise in the limit.

Italian translation of the BIS Press Release on the presentation of the Annual Report (25 June 2017)

The 2019 Report of the Technical Cooperation Programme (TCP) examines the role of the TCP to deliver FAO technical assistance for agriculture, food and nutrition in response to countries’ most [...]

Each night, the institution will post an encore showing of an opera from its "Met Live in HD" series

FSI Briefs No 2, April 2020. Guidance issued by financial sector authorities in response to the Covid-19 crisis seems to suggest that international efforts to come up with operational resilience standards should take into account at least the following elements: Critical/essential employees: identifying the critical functions and employees that support important business services, as well as ensuring employees' safety and that they can safely resume their duties (remotely, if necessary); IT infrastructure: ensuring that IT infrastructure can support a sharp increase in usage over an extended period and taking steps to safeguard information security; Third-party service providers: ensuring that external service providers and/or critical suppliers are taking adequate measures and are sufficiently prepared for a scenario in which there will be heavy reliance on their services; Cyber resilience: remaining vigilant in order to identify and protect vulnerable systems, and detect, respond and recover from cyber attacks..

Press release: CPMI and IOSCO share authorities´ experiences in cooperation to increase FMI safety and efficiency, 10 December 2019

Press release "Governors and Heads of Supervision announce deferral of Basel III implementation to increase operational capacity of banks and supervisors to respond to Covid-19", 27 March 2020

Manitoba municipalities will be receiving most of their operating funding from the province sooner than usual because of the COVID-19 pandemic, the province announced Friday.

Officials with Maritime Pride Eggs say their Summerside, P.E.I., egg facility will cease processing operations on June 5.

Michell Jesse said the personal care home operators she represents have been frustrated trying to keep up with the government's direction during an already stressful time.

Sofina Foods plants in Burlington and Mississauga have each had an employee test positive.

CNA Staff, May 5, 2020 / 03:01 pm (CNA).- At least 51 workers have been infected with the novel coronavirus at the Grasberg mine in Indonesia, the world’s largest gold mine.

Nine employees of Freeport McMoRan, the organization who operates the mine, have been hospitalized due to COVID-19 and another 42 have been forced into quarantine, UCA News reported May 5.

The mine is located in Papua and is known for its production of gold and copper. The operation includes around 20,000 employees.

Riza Pratama, vice president of Freeport, said the company will fully cooperate with the government's coronavirus task force but will continue mining operations to support the national economy. He said the company will prioritize the health and safety of workers and will conduct regular health screenings, implement social distancing, provide a quarantine area for employees, according to UCA News.

Father Ansel Amo, who heads the Justice, Peace, and Integrity of Creation Commission for the Archdiocese of Merauke, said these measures are not enough to protect workers.

“Freeport management should limit workers’ activities so that they don’t transmit the disease to other people, including local people. They should stop its operations temporarily,” he told UCA News.

Indonesia has seen more than 12,000 cases from the coronavirus, leading to 872 reported deaths as of May 5. Globally, more than 3.7 million cases of the virus have been reported, and a quarter of a million deaths.