BACKGROUND Wait time is among the most commonly cited barriers to access among individuals seeking entry to substance abuse treatment, yet relatively little is known about what contributes to it. OBJECTIVES To address this gap, this study draws from a national sample of substance abuse treatment clients and programs to estimate the proportion of clients entering treatment who waited more than...

Different manufacturing enterprises use regularly scheduling algorithms in order to help meeting demands over time and reducing operational costs. Nowadays, for a better useofresources and manufacturingin accordance withcustomer needs and given the level ofcompetitionbetweencompanies, employing asuitablescheduling programhasa double importance. Conventional productionmethods are constantly subs...

Service wait time is a key performance indicator in the food service industry. A real-case scenario of a cafeteria situated on a college campus is studied for service time. During the lunch hours, there is always a large queue that impacts serviceability. This study identifies the stations and events where the wait time increase and suggests with a solution. A discrete event simulation (DES) mo...

Polling systems are a well-established subject in queueing theory. However, their formal treatments generally rely heavily on relatively sophisticated theoretical tools, such as moment generating functions and Laplace transforms, and solutions often require the solution of large systems of equations. We show that, if you are willing to only have the average waiting of a system time rather than ...

Studies of the reproductive biology of the nematode Caenorhabditis elegans are providing valuable insights into the evolution and diversity of reproductive strategies [1,2]. The successful production of progeny in any species also highlights many fundamental problems in cell biology. Research on the amoeboid sperm of nematodes addresses a number of issues of broad biological significance, inclu...

Moving from the resuscitation room, where the preceding 45 minutes of the shift seems to disappear in a blur of CPR, drug administration, defibrillation attempts, and invasive procedures, into the “urgent” care section of the emergency department (ED) where a young mother has been waiting, worrying for 3 hours with her febrile child, it is too easy to forget about the relativity of time. Newton...

BACKGROUND Wait times are an important measure of access to various health care sectors and from a patient's perspective include several stages in their care. While mechanisms to improve wait times from specialty care have been developed across Canada, little is known about wait times from primary to specialty care. Our objectives were to calculate the wait times from when a referral is made by...

Network-centric operations, in which multiple human and computer-based agents are linked in order to leverage information superiority, will bring increases in available information sources, volume of information and operational tempo, all of which will place higher cognitive demands on operators. This is an especially critical problem for operators who will be attempting to control multiple veh...

This research tests people’s support for the ‘‘wait-and-see’’ approach in climate change due to the uncertainty in both the timing and probability of future consequences. In a laboratory experiment, carbon-tax consequences were presented to participants in one of two forms: a written description, where the probability, consequences, and timing were explicitly provided; and experience, where the...

OBJECTIVES Patients with thyroid pathology tend have longer surgical wait times. Uncertainty during this wait can have negative psychologically impact. This study aims to determine the degree of psychological morbidity in patients waiting for thyroid surgery. STUDY DESIGN Prospectively assessing patients pre- and postoperative psychological morbidity (level 2c). METHODS Patients waiting for...