Objectives: The authors investigated whether models using time series methods can generate accurate short-term forecasts of emergency department (ED) bed occupancy, using traditional historical averages models as comparison. Methods: From July 2005 through June 2006, retrospective hourly ED bed occupancy values were collected from three tertiary care hospitals. Three models of ED bed occupancy ...

In every tunnel boring machine (TBM) tunneling project, there is an initial low production phase so-called the Learning Phase Period (LPP), in which low utilization is experienced and the operational parameters are adjusted to match the working conditions. LPP can be crucial in scheduling and evaluating the final project time and cost, especially for short tunnels for which it may constitute a ...

introduction iranian traditional cities represent a real symbol of stability and health. these conditions indicate that such urban planning design and program have been done thoughtfully and wisely. in these cities, the natural resources are used with minimal damage to existing endowments, and the highest efficiency is provided. but it often destroyed due to some people's ignorance and leg...

the cities of jay in pre-islamic and yahudiya in the post islamic period were located in a plain delimited from three sides by surrounding heights. this area, referred to in historical and geographical documents as the rostāq-i jay, was the most important rural district of isfahan's khora. with rising of buyids, they decided to change the seat of power from jay to yahudiya and consequently...

in the iranians’ system of thought, the habitable cities had such great importance that their constructions were attributed to the kings especially the sasanians in the historical and geographical works and also in ferdowsi’s shāh-nāme. in the first part, this essay seeks to gather and classify various examples and analyze the construction model of cities and their specifications in ancient ira...

in recent decades, iranian villages have experienced an increasing transformation culturally and environmentally due to the social changes. in pre-modern period (about half a century ago), villages were known as the production sources and had an important social and economic credit as cities foundation. however, a number of changes occurred in the rural “lifestyle” resulting from development of...

In Iran, new centralization characteristic, especially during Pahlavi dynasty, has been convergence and its vast use in bureaucracy. Historical sociological studies have consensus on the issues of centralization, power centralization, and political sovereignty in Iran; however, these issues have some divisional interruptions and different levels of strength in some parts of the history. This es...

OBJECTIVE Patient medical history is important for making a diagnosis of causes of dizziness, but there have been no studies on the diagnostic value of individual items in the history. This study was performed to identify and validate useful questions for suspecting a diagnosis of benign paroxysmal positional vertigo (BPPV). METHODS Construction and validation of a disease prediction model wa...