proximity of the vagus nerve to a patent ductus arteriosus (pda) can cause traction or entrapment of vagus nerve during surgical closure of the in rare occasions. this can lead to a life threatening postoperative bradycardia. herein, we report a case of bradycardia caused by unexpected irritation of the vagal trunk by the end of operation. the patient was managed by re-opening the chest, lung r...

Background: The road to respond to the needs of today's modern world, affected by the advancement of technological tools, seeks to increase speed and increasing safety. This study seeks to improve the landscape quality of roads, explains the effective criteria in road design and the need to pay attention to the category of design ethics and emphasizes them. Conclusion: In order to increase the...

The mechanical properties of the walls of blood vessels have an important influence on the flow of blood and passage of pulse waves along them. Though a certain amount of information is available concerning the mechanical properties of the aorta and its main branches (Burton, 1954), we have been unable to find any observations on the pulmonary circulation. Hence, in view of the increasing inter...

road traffic accident (rta) is a global burden of disease. more than 1.25 million people per year are killed by rtas. more than half of the fatalities strike vulnerable road users (e. g. pedestrians, skaters, cyclists and other non-protected road users). the ongoing challenge is to protect vulnerable road users (vru). as a vru is neither shielded by seatbelts or crumple zones nor by airbags, th...

Road traffic crash is a cause of unnatural death and occupies fifth position in the world as per WHO records. Road crashes in India are alarming in situation while road safety is professionally lacking and politically missing. Hyderabad city, the capital of newly formed Telangana State occupies sixth position in occurrence of road crashes. An attempt is made to understan...

The road coloring problem is an interesing problem proposed over 40 years ago by Adler, Goodwyn and Weiss. Hundreds of mathematicians worked on this problem and failed to make the conjecture a theorem. Finally, in 2007, it was proved by a 60-year-old Israeli mathematician, Avraham Trahtman. It turns out the prove was quite simple after Trahtman partitioned the graph into cycles and trees. The d...

Two trends could be observed in the evolution of road transport. First, with traffic becoming increasingly intensive, motor infrastructure is developed; more advanced, greater quality, and durable materials are used; pavement laying repair techniques improved continuously. The continued growth number vehicles on accompanied by ongoing improvement vehicle design view towards controllability as k...

skid resistance and road condition are common indices of road safety; therefore providing adequate skidding resistance will reduce the incidence of road accidents. the surface macrotexture has a large effect on the characteristics of road surface skidding, which is the focus of this research. during the study, the mean texture depth of the road surface was measured, in order to determine the co...