Swan is a data structure visualization system. It allows users to visualize the data structures and execution process of a C/C++ program. Swan views a data structure as a graph or collection of graphs. By “graph” we mean general directed and undirected graphs and special cases such as trees, lists and arrays. As a part of Virginia Tech’s NSF Educational Infrastructure Grant, Swan will be used i...

  There is a significant relationship between economic growth and the degree of urban concentration, as measured by primacy or the share of the largest city in an urban system. In accordance to urban economic theories, there is an inverse-U shape relationship between urban concentration –urban primacy- and economic growth. That is, as economy grows, urban concentration increases, approaches a...

—Once an abundant and conspicuous presence in wetlands across much of north-central North America, Trumpeter Swan ( Cygnus buccinator ) poplulations were decimated in the midto late 1800s by a combination of market hunting, subsistence hunting, and habitat loss. Since then, restoration has focused primarily on reintroduction efforts in which captive-reared birds are released and then monitored....

About half the growth in real per capita medical spending from 1960 to 1993 and two-thirds of its growth from 1983 to 1993 resulted from either the level or the growth of insurance coverage, chiefly the former. Dividing all factors determining the 1960-1993 growth in real per capita medical spending into two major categories, we find that 70 percent of this growth resulted from cost-increasing ...

Pulmonary artery (PA) rupture caused by a PA Swan-Ganz catheter is a rare complication but remains fatal in almost 50% of cases. False aneurysm of the PA is a rare presentation of PA rupture and should be considered as a possible diagnosis in a patient with a new lung mass after PA catheterization. We present a case of sudden-onset pulmonary alveolar hemorrhage during cardiovascular surgery due...

Failure to withdraw a catheter is related primarily to catheter entrapment or knotting. Placement of a Swan-Ganz catheter is associated with various complications, one of which is entrapment. Entrapment of a Swan-Ganz catheter in the heart, vena cava, or pulmonary artery is a very rare and serious complication that may lead to life-threatening complications if not treated appropriately. Most re...

In response to the growing need to support better than best-effort (BE) quality of service (QoS) in mobile ad-hoc and sensor networks, many QoS models have been proposed. SWAN independent QoS model is introduced to operate on wireless ad-hoc networks. As a cross layer QoS model, SWAN is flexible and may run over any routing protocol or Media Access Control (MAC) layers. SWAN provides some advan...

OBJECTIVE To develop a psychotherapy rating scale to measure therapist adherence in the Strong Without Anorexia Nervosa (SWAN) study, a multi-center randomized controlled trial comparing three different psychological treatments for adults with anorexia nervosa. The three treatments under investigation were Enhanced Cognitive Behavioural Therapy (CBT-E), the Maudsley Anorexia Nervosa Treatment f...

BACKGROUND Attention-deficit/hyperactivity disorder (ADHD) is a common and impairing child and adolescent psychiatric disorder. Early identification and prompt treatment are essential. Rating scales are commonly used by clinicians and researchers to assess ADHD children. OBJECTIVE In the current study, we aimed to examine the clinical utility of the Chinese version of the Strengths and Weakne...