Emergency Disposal Research Articles

The biosecurity of on-farm mortality composting

Composting is a natural biological decomposition process that takes place under aerobic and thermophilic conditions. It can be used for the day-to-day management of mortalities on farms and for carcass disposal in emergency animal disease (EAD) outbreaks. In mortality composting, carcasses are placed in piles or bins together with supplemental carbon sources such as sawdust, litter, straw or wood shavings. Composting is particularly suitable for broiler-farm mortalities and litter. In the case of emergency disease outbreaks, composting can be conducted either inside or outside the poultry house following killing. Composting has been successfully employed for emergency disposal of carcasses in a few cases in North America, but research is lacking on the biosecurity of the process. Composting is a well-established pathogen reduction technology, but process management and heterogenous pile conditions pose particular challenges for validating the microbiological safety of mortality composting. This paper reviews the available information on the biosecurity of mortality composting, identifies potential sources of risk, and highlights emerging research needs. Reports to date of the use of composting in EAD outbreaks are also discussed.

SELF-STABLE RUNNING WITH SEGMENTED LEGS

Some quadruped robots developed recently show better dynamic performance and environmental adaptability than ever, and have been preliminarily applied in the field of emergency disposal, military reconnaissance and infrastructure construction. The development route, mechanisms design, control methods and mobile manipulating approaches of the quadruped robots are surveyed in this article. Firstly, the development route of the quadruped robot is combed, as the references of the forecast of the future work on quadruped robots. Then the bionic structure and the motion control method of the quadruped robot is summarized, the advantages and disadvantages are analyzed in aspects of gait switching, terrain adaption and disturbance resistance. Subsequently, aiming at the mobile manipulation of the quadruped robot, the representative leg-arm collaborative robots and the multi-task-oriented Whole-body Control (WBC) methods are introduced. Finally, the summary and future work of the quadruped robots is given.

A new skatepark: The impact on the local hospital

There has been a resurgence of skateboarding, rollerblading and BMX riding in recent years and in response dedicated skateparks have opened in many cities across the UK. It is acknowledged that these sports are associated with risk of injury and it is recommended that participants wear protective clothing. We aimed to determine if the opening of a skatepark near our hospital had any effect on the number of skatepark related injuries attending the emergency department and to describe the types of injuries sustained. All patients attending the emergency department with sports injuries were identified over 24 consecutive weeks. At the end of the 12th week a skatepark opened nearby. Data recorded prospectively included age and sex of subjects, the delay from injury to presenting to hospital, whether or not protective equipment was worn and if first aid was administered before attending hospital. The investigations performed in the emergency department, the diagnosis, treatment received and disposal from the hospital were also recorded. After the skatepark opened there was a significant increase in the number of skatepark related attendances from 7 to 32. Protective clothing was only worn by 9 out of 39 of those with injuries. The commonest injuries were musculoskeletal and the limbs were injured more frequently than the head and trunk. We demonstrated a significant increase in the number of skatepark related injuries attending the emergency department following the opening of a nearby skatepark.

Extraction for ISABELLE

The design specifications for ISABELLE, a superconducting proton storage ring facility under construction at Brookhaven National Laboratory call for circulating beam intensities of up to 6 x 1014 protons at 400 GeV energy in each ring. The energy stored in the beam is 41 Megajoules, an order of magnitude more than what has been dealt with in the past. This beam energy cannot be safely disposed of within the confines of the ISABELLE lattice if damage to the dump or quenching of the superconducting magnets is to be avoided. Therefore the full intensity beam must be extracted from the storage rings under all circumstances of emergency or routine beam disposal. Beam losses in excess of 10-3 of the full beam can jeopardize the extraction components and lead to magnet quenching as well. In this note we summarize a conceptual design of the extraction system and discuss the major constraints which lead to the parameters chosen.

An electric arc without an intensely hot cathode

The biosecurity of composting as an emergency disposal method for cattle mortalities caused by disease was evaluated by conducting full-scale field trials begun during three different seasons and using three different envelope materials. Process biosecurity was significantly affected by the envelope material used to construct the composting matrix. Internal temperatures met USEPA Class A time/temperature criteria for pathogen reduction in 89%, 67%, and 22%, respectively of seasonal test units constructed with corn silage, straw/manure, or ground cornstalks. In trials begun in the winter, survival times of vaccine strains of avian encephalomyelitis and Newcastle disease virus were noticeably shorter in silage test units than in the other two materials, but during summer/spring trials survival times in ground cornstalk and straw/manure test units were similar to those in test units constructed with silage.