Are All the Stable Jobs Gone? The Transformation of the Worker-Firm Relationship and Trends in Job Tenure Duration and Separations in Canada, 1976-2015.

The literature on flexibilization documents the decline of the standard employment relationships, resulting in greater job insecurity. Consequently, the stability of career trajectories is expected to have decreased. However, existing studies in many countries pose a significant challenge: the available evidence shows no clear downward trend and possibly even an increase in job stability since the 1970s, as measured by trends in job tenure duration or job separations.

Dark matter axion search using a Josephson Traveling wave parametric amplifier.

We describe the first implementation of a Josephson Traveling Wave Parametric Amplifier (JTWPA) in an axion dark matter search. The operation of the JTWPA for a period of about two weeks achieved sensitivity to axion-like particle dark matter with axion-photon couplings above 10-13 Ge V-1 over a narrow range of axion masses centered around 19.84 µeV by tuning the resonant frequency of the cavity over the frequency range of 4796.

Search for a Dark-Matter-Induced Cosmic Axion Background with ADMX.

We report the first result of a direct search for a cosmic axion background (CaB)-a relativistic background of axions that is not dark matter-performed with the axion haloscope, the Axion Dark Matter eXperiment (ADMX). Conventional haloscope analyses search for a signal with a narrow bandwidth, as predicted for dark matter, whereas the CaB will be broad. We introduce a novel analysis strategy, which searches for a CaB induced daily modulation in the power measured by the haloscope.

Search for Invisible Axion Dark Matter in the 3.3-4.2 μeV Mass Range.

We report the results from a haloscope search for axion dark matter in the 3.3-4.2  μeV mass range.

Constraints on Lightly Ionizing Particles from CDMSlite.

The Cryogenic Dark Matter Search low ionization threshold experiment (CDMSlite) achieved efficient detection of very small recoil energies in its germanium target, resulting in sensitivity to lightly ionizing particles (LIPs) in a previously unexplored region of charge, mass, and velocity parameter space. We report first direct-detection limits calculated using the optimum interval method on the vertical intensity of cosmogenically produced LIPs with an electric charge smaller than e/(3×10^{5}), as well as the strongest limits for charge ≤e/160, with a minimum vertical intensity of 1.36×10^{-7}  cm^{-2} s^{-1} sr^{-1} at charge e/160.

Light Dark Matter Search with a High-Resolution Athermal Phonon Detector Operated above Ground.

We present limits on spin-independent dark matter-nucleon interactions using a 10.6 g Si athermal phonon detector with a baseline energy resolution of σ_{E}=3.86±0.

Factors influencing precision medicine knowledge and attitudes.

Precision medicine holds great promise for improving health and reducing health disparities that can be most fully realized by advancing diversity and inclusion in research participants. Without engaging underrepresented groups, precision medicine could not only fail to achieve its promise but also further exacerbate the health disparities already burdening the most vulnerable. Yet underrepresentation by people of non-European ancestry continues in precision medicine research and there are disparities across racial groups in the uptake of precision medicine applications and services.

1.6:1 bandwidth two-layer antireflection structure for silicon matched to the 190-310 GHz atmospheric window.

Although high-resistivity, low-loss silicon is an excellent material for terahertz transmission optics, its high refractive index necessitates an antireflection treatment. We fabricated a wide-bandwidth, two-layer antireflection treatment by cutting subwavelength structures into the silicon surface using multi-depth deep reactive-ion etching (DRIE). A wafer with this treatment on both sides has <-20  dB (<1%) reflectance over 187-317 GHz at a 15° angle of incidence in TE polarization.

Computational modeling of airway instability and collapse in tracheomalacia.

Background: Tracheomalacia (TM) is a condition of excessive tracheal collapse during exhalation. Both acquired and congenital forms of TM are believed to result from morphological changes in cartilaginous, fibrous and/or smooth muscle tissues reducing airway mechanical properties to a degree that precipitates collapse. However, neither the specific amount of mechanical property reduction nor the malacic segment lengths leading to life threatening airway collapse in TM are known.

Food protein-induced enterocolitis syndrome to trivial oral mucosal contact.

Food protein-induced enterocolitis syndrome (FPIES) is a non-immunoglobulin E (IgE)-mediated gastrointestinal food hypersensitivity, mostly in infants. Patients usually present very ill and often misdiagnosed as acute gastroenteritis, sepsis, ileus, metabolic disorders, necrotizing enterocolitis, or severe gastroesophageal reflux disease. We present a case of an infant who had three acute FPIES episodes: the first was at 5 months of age after chewing on a cellophane wrapper, the second was due to sweet potato, and the third was due to rice cereal.

Scald risk in social housing can be reduced through thermostatic control system without increasing Legionella risk: a cluster randomised trial.

Objective: To quantify the effects of a thermostatic control system in social (public) housing on the prevalence of dangerous (>60°C) water temperatures and on fuel consumption.

Design: Pair-matched double-blind cluster randomised controlled trial.

Setting: Social housing in a deprived inner-London borough.

LRP1 regulates remodeling of the extracellular matrix by fibroblasts.

Low density lipoprotein receptor-related protein (LRP1) is an endocytic receptor for diverse proteases, protease inhibitors, and other plasma membrane proteins, including the urokinase receptor (uPAR). LRP1 also functions in cell-signaling and regulates gene expression. The goal of this study was to determine whether LRP1 regulates remodeling of provisional extracellular matrix (ECM) by fibroblasts.

Health behavior models and oral health: a review.

Dental hygienists help their clients develop health promoting behaviors, by providing essential information about general health, and oral health in particular. Individual health practices such as oral self-care are based on personal choices. The guiding principles found in health behavior models provide useful methods to the oral health care providers in promoting effective individual client behaviors.

In-office MR imaging.

The development of new metal alloys, along with more innovative magnet technology, has permitted the construction of smaller magnets for magnetic resonance (MR) systems, which, in turn, has allowed development of MR imaging systems designed to be physically smaller than conventional whole-body MR imaging systems. These specialized devices are commonly referred to as "niche," "dedicated," or "extremity" MR imaging systems. Performing MR imaging procedures with this type of system offers distinct advantages that include reduced overall costs, more convenient installation and siting, and greater patient comfort and safety.

Dedicated extremity MR imaging of the knee: how low can you go?

Low-field strength, dedicated extremity MR imaging systems can provide clinically effective MR images at substantially lower costs, compared with high-field strength, whole-body MR imaging machines. Dedicated extremity units also reduce risks of patient safety and claustrophobia. The diagnostic performance of presently existing extremity MR scanners rivals that of high-field strength units.

Fat-suppressed fast spin-echo mid-TE (TE[effective]=34) MR images: comparison with fast spin-echo T2-weighted images for the diagnosis of tears and anatomic variants of the glenoid labrum.

Objective: To compare the sensitivity, specificity, and accuracy of fat-suppressed fast spin-echo (FSE) mid-TE (TE[effective]=34) images with fat-suppressed FSE T2-weighted images for the diagnosis of labral abnormalities.

Design And Patients: The study included 27 consecutive patients who had axial fat-suppressed FSE T2-weighted and fat-suppressed FSE mid-TE MR images, and had labral abnormalities diagnosed at arthroscopy. The acquisition time was about 5 min for each sequence, but the mid-TE sequence allowed a higher spatial resolution than the T2-weighted images (256x256 versus 256x192).

Comparison of treatment plans for lower extremity arterial occlusive disease made with electrocardiography-triggered two-dimensional time-of-flight magnetic resonance angiography and digital subtraction angiography.

Background: The purpose of the study was to determine whether preoperative treatment plans for patients with lower extremity ischemia can be made with electrocardiography (EKG)-triggered two-dimensional (2D) time-of-flight (TOF) magnetic resonance angiography (MRA) as accurately as digital subtraction angiography (DSA).

Methods: Forty patients were prospectively evaluated with the combination of EKG-triggered 2D TOF MRA, DSA, and pulse volume recordings. Blinded reviewers graded arterial segments for disease severity.

Are oblique views needed for trauma radiography of the distal extremities?

Objective: To our knowledge, few studies exist on the importance of the oblique view when radiography of the distal extremities is performed after acute trauma. Our prospective study aimed to determine whether the oblique view uniquely revealed abnormalities or clarified findings when it was obtained along with routine frontal and lateral radiographs.

Subjects And Methods: We prospectively interpreted 1461 consecutive radiographic examinations of the distal extremities in patients presenting with acute trauma to four family medicine clinics.

MR imaging of rotator cuff tears in individuals with paraplegia.

Objective: The purpose of this study was to use MR imaging to evaluate the prevalence and extent of rotator cuff tears in paraplegic patients, who are at increased risk for impingement caused by overuse.

Materials And Methods: Sixty-four MR examinations of the shoulder were evaluated for partial or full-thickness rotator cuff tears and for single or multiple rotator cuff tendon tears. Thirty-seven MR studies were from paraplegic subjects (26 symptomatic, 11 asymptomatic), and 27 MR studies were from able-bodied subjects (17 symptomatic, 10 asymptomatic).

Association of sonographically detected subacromial/subdeltoid bursal effusion and intraarticular fluid with rotator cuff tear.

Objective: Although an association between sonographically detected joint fluid and rotator cuff disease has been reported, the significance of sonographically detected subacromial/subdeltoid bursal effusion has not been studied. We examined a group of patients who had shoulder sonography and surgery to determine the association between bursal and joint effusion and surgically proved tears of the rotator cuff.

Materials And Methods: We retrospectively reviewed the preoperative shoulder sonography reports of 163 patients for the presence of fluid within the subacromial/subdeltoid bursa or glenohumeral joint.

Gallbladder sludge formation after bone marrow transplant: sonographic observations.

We prospectively studied 12 patients before and after bone marrow transplantation (BMT) with serial sonography to evaluate gallbladder sludge formation. Patients were studied on four separate occasions to assess the gallbladder for sludge and stones: prior to BMT and conditioning chemoradiation, and on days 3, 13, and 28 after BMT. During two of the sonographic studies, gallbladder volume measurements were made before and after administration of cholecystokinin octapeptide (CCK-OP) and the ejection fraction (EF) was calculated.

The association of oral status with systemic health, quality of life, and economic productivity.

It is well established that many systemic adverse health conditions have manifestations in the oral cavity. The purpose of this paper is to summarize the available scientific evidence that describes the opposite effect, how adverse oral health conditions affect three aspects of daily living: 1) systemic health, 2) quality of life, and 3) economic productivity. Examples of oral health affecting systemic health include rheumatic fever patients who develop infective endocarditis from oral bacteria and organ transplant patients who develop severe complications from oral infections.

Frequent occurrence of new hepatobiliary abnormalities after bone marrow transplantation: results of a prospective study using scintigraphy and sonography.

With hepatobiliary scintigraphy and sonography, we prospectively studied the occurrence of new hepatobiliary abnormalities in 18 patients before, and from 1 to 103 days after, bone marrow transplantation (BMT). Prior to BMT, all patients had normal hepatic uptake and visualization of the gallbladder by 60 min on scintigraphy, and no sludge, stones, or other abnormalities on sonography. After BMT, 16 patients (89%) developed new scintigraphic and/or sonographic hepatobiliary abnormalities.