Technology research for strapdown inertial experiment and digital flight control and guidance

A helicopter flight-test program to evaluate the performance of Honeywell's Tetrad - a strapdown, laser gyro, inertial navitation system is discussed. The results of 34 flights showed a mean final navigational velocity error of 5.06 knots, with a standard deviation of 3.84 knots; a corresponding mean final position error of 2.66 n.mi., with a standard deviation of 1.48 n.m.; and a modeled mean-position-error growth rate for the 34 tests of 1.96 knots, with a standard deviation of 1.09 knots. Tetrad's four-ring laser gyros provided reliable and accurate angular rate sensing during the test program and on sensor failures were detected during the evaluation. Criteria suitable for investigating cockpit systems in rotorcraft were developed. This criteria led to the development of two basic simulators. The first was a standard simulator which could be used to obtain baseline information for studying pilot workload and interactions. The second was an advanced simulator which integrated the RODAAS developed by Honeywell into this simulator. The second area also included surveying the aerospace industry to determine the level of use and impact of microcomputers and related components on avionics systems

Ab initio parametrised model of strain-dependent solubility of H in alpha-iron

The calculated effects of interstitial hydrogen on the elastic properties of alpha-iron from our earlier work are used to describe the H interactions with homogeneous strain fields using ab initio methods. In particular we calculate the H solublility in Fe subject to hydrostatic, uniaxial, and shear strain. For comparison, these interactions are parametrised successfully using a simple model with parameters entirely derived from ab initio methods. The results are used to predict the solubility of H in spatially-varying elastic strain fields, representative of realistic dislocations outside their core. We find a strong directional dependence of the H-dislocation interaction, leading to strong attraction of H by the axial strain components of edge dislocations and by screw dislocations oriented along the critical slip direction. We further find a H concentration enhancement around dislocation cores, consistent with experimental observations.Comment: part 2/2 from splitting of 1009.3784 (first part was 1102.0187), minor changes from previous version

Investigation of advanced fault insertion and simulator methods

The cooperative agreement partly supported research leading to the open-literature publication cited. Additional efforts under the agreement included research into fault modeling of semiconductor devices. Results of this research are presented in this report which is summarized in the following paragraphs. As a result of the cited research, it appears that semiconductor failure mechanism data is abundant but of little use in developing pin-level device models. Failure mode data on the other hand does exist but is too sparse to be of any statistical use in developing fault models. What is significant in the failure mode data is that, unlike classical logic, MSI and LSI devices do exhibit more than 'stuck-at' and open/short failure modes. Specifically they are dominated by parametric failures and functional anomalies that can include intermittent faults and multiple-pin failures. The report discusses methods of developing composite pin-level models based on extrapolation of semiconductor device failure mechanisms, failure modes, results of temperature stress testing and functional modeling. Limitations of this model particularly with regard to determination of fault detection coverage and latency time measurement are discussed. Indicated research directions are presented

Causes of death up to 10 years after admissions to hospitals for self-inflicted, drug-related or alcohol-related, or violent injury during adolescence: a retrospective, nationwide, cohort study

Background: Emergency hospital admission with adversity-related injury (ie, self-inflicted, drug-related or alcohol-related, or violent injury) affects 4% of 10–19-year-olds. Their risk of death in the decade after hospital discharge is twice as high as that of adolescents admitted to hospitals for accident-related injury. We established how cause of death varied between these groups. Methods: We did a retrospective, nationwide, cohort study comparing risks of death in five causal groups (suicide, drug-related or alcohol-related, homicide, accidental, and other causes of death) up to 10 years after hospital discharge following adversity-related (self-inflicted, drug-related or alcohol-related, or violent injury) or accident-related (for which there was no recorded adversity) injury. We included adolescents (aged 10–19 years) who were admitted as an emergency for adversity-related or accident-related injury between April 1, 1997, and March 31, 2012. We excluded adolescents who did not have their sex recorded, died during the index admission, had no valid discharge date, or were admitted with injury related to neither adversity nor accidents. We identified admissions for adversity-related or accident-related injury to the National Health Service in England with the International Classification of Diseases-10 codes in Hospital Episode Statistics data, linked to the Office for National Statistics mortality data for England, to establish cause-specific risks of death between the first day and 10 years after discharge, and to compare risks between adversity-related and accident-related index injury after adjustment for age group, socioeconomic status, and chronic conditions. Findings: We identified 1 080 368 adolescents (388 937 [36·0%] girls, 690 546 [63·9%] boys, and 885 [0·1%] adolescents who did not have their sex recorded). Of these adolescents, we excluded 40 549 (10·4%) girls, 56 107 (8·1%) boys, and all 885 without their sex recorded. Of the 333 009 (30·8%) adolescents admitted with adversity-related injury (181 926 [54·6%] girls and 151 083 [45·4%] boys) and 649 818 (60·2%) admitted with accident-related injury (166 462 [25·6%] girls and 483 356 [74·4%] boys), 4782 (0·5%) died in the 10 years after discharge (1312 [27·4%] girls and 3470 [72·6%] boys). Adolescents discharged after adversity-related injury had higher risks of suicide (adjusted subhazard ratio 4·54 [95% CI 3·25–6·36] for girls, and 3·15 [2·73–3·63] for boys) and of drug-related or alcohol-related death (4·71 [3·28–6·76] for girls, and 3·53 [3·04–4·09] for boys) in the next decade than they did after accident-related injury. Although we included homicides in our estimates of 10-year risks of adversity-related deaths, we did not explicitly present these risks because of small numbers and risks of statistical disclosure. There was insufficient evidence that girls discharged after adversity-related injury had increased risks of accidental deaths compared with those discharged after accident-related injury (adjusted subhazard ratio 1·21 [95% CI 0·90–1·63]), but there was evidence that this risk was increased for boys (1·26 [1·09–1·47]). There was evidence of decreased risks of other causes of death in girls (0·64 [0·53–0·77]), but not in boys (0·99 [0·84–1·17]). Risks of suicide were increased following self-inflicted injury (adjusted subhazard ratio 5·11 [95% CI 3·61–7·23] for girls, and 6·20 [5·27–7·30] for boys), drug-related or alcohol-related injury (4·55 [3·23–6·39] for girls, and 4·51 [3·89–5·24] for boys), and violent injury in boys (1·43 [1·15–1·78]) versus accident-related injury. However, the increased risk of suicide in girls following violent injury versus accident-related injury was not significantly increased (adjusted subhazard ratio 1·48 [95% CI 0·73–2·98]). Following each type of index injury, risks of suicide and risks of drug-related or alcohol-related death were increased by similar magnitudes. Interpretation: Risks of suicide were significantly increased after all types of adversity-related injury except for girls who had violent injury. Risks of drug-related or alcohol-related death increased by a similar magnitude. Current practice to reduce risks of harm after self-inflicted injury should be extended to drug-related or alcohol-related and violent injury in adolescence. Prevention should address the substantial risks of drug-related or alcohol-related death alongside risks of suicide. Funding: UK Department of Health

Use of ERTS-1 data to access and monitor change in the west side of the San Joaquin Valley and central coastal zone of California

There are no author-identified significant results in this report

Acute stress induced by the preslaughter use of electric prodders causes tougher beef meat

Adrenergic activation and hormone release preslaughter is an inevitable outcome of the systems used to move cattle to slaughter. The aim of this experiment was to investigate the effects of acute preslaughter stress in beef cattle on postmortem muscle metabolism and the meat quality, including consumer-assessed eating quality. Eighty-four cattle were used on three separate days, with ‘mobs’ of four cattle allocated to either a ‘control’ (no electric goads used preslaughter) or a ‘stress’ (six prods given with an electric goad over 5–10 min) treatment at 15 min preslaughter. Cattle undergoing the ‘stress’ treatment had higher plasma lactate at slaughter. The prerigor pH and temperature, ultimate pH and temperature at rigor of the longissimus thoracis muscle were similar between treatments (P\u3e0.05 for all). The water-holding capacity of the longissimus lumborum was reduced by the ‘stress’ treatment, as indicated by higher levels of water lost during suspension (drip loss), storage (purge) for 21 days and cooking (cooking loss at 1 day postslaughter) (P\u3c0.05 for all). ‘Stress’ cattle produced longissimus lumborum muscle with similar sarcomere lengths andWarner–Bratzler shear force at 2, 6 and 21 days , compared to ‘control’ cattle (P\u3c0.05 for all). The longissimus lumborum muscle of cattle undergoing the ‘stress’ treatment was rated less tender, less juicy, with a less acceptable flavour, a lower ‘liking’ and a lower MQ4 score (P\u3c0.05 for all). The ‘bloomed’ surface colour (CIE L*, a*, b*) of the longissimus lumborum muscle at 2, 6 and 21 days postslaughter was similar between the ‘stress’ and ‘control’ treatments (P\u3e0.05 for all). In conclusion, cattle subjected to acute preslaughter stress using electric goads produced meat which the consumer rated as tougher with inferior quality. The inferior quality induced by the acute stress treatment was associated with reduced water-holding capacity but was independent of muscle pH and temperature

What are the participants’ perspectives of taking melatonin for the treatment of nocturia in Multiple Sclerosis? -a qualitative study embedded within a double blind RCT

Background: Multiple Sclerosis (MS) is a chronic neurological disorder caused by neurodegeneration within the central nervous system. It results in impaired physical, cognitive and psychological functioning and can also lead to lower urinary tract symptoms including nocturia. While clinical trials have suggested an association between nocturia and melatonin secretion, to our knowledge, no qualitative research has been conducted on the experience of taking melatonin to treat nocturia in progressive MS within a clinical trial. Methods: 17 semi-structured qualitative interviews were conducted as part of a double-blind, randomised, placebo controlled, crossover, clinical trial with consenting adults with MS. Interviews explored participants’ experiences of nocturia associated with MS and their experience of taking melatonin as a trial treatment for nocturia versus a placebo. Data was analysed using a thematic analysis. Results: Themes on the experience of nocturia revealed participants’ understandings of nocturia, the impact it had on their night and increased daily fatigue. Themes on the intervention showed perceived improvements to nocturia, sleep and energy and negative effects including lethargy, a lack of significant change and physical side effects including vivid dreams.Conclusion: This qualitative exploration revealed an association between nocturia and increased levels of fatigue during the day by those with MS. However, perspectives towards the effectiveness of melatonin as a potential treatment varied as both placebo and melatonin were perceived as having very similar effects

Radiological survey of Latty Avenue in the vicinity of the former Cotter site, Hazelwood/Berkeley, Missouri (LM001)

A radiological survey was conducted over a proposed construction corridor in the vicinity of the former Cotter site at 9200 Latty Avenue. The survey included gamma exposure rates at the ground surface and at 1 m above the surface throughout the site, sampling of surface soil, sampling of subsurface soil from auger holes, gamma logging of auger holes, and sampling of subsurface water. The results of the survey demonstrated some degree of radioactive contamination in all areas of the construction corridor, extending north and south in some regions onto adjacent private properties. Redistribution of the contamination by flooding, surface runoff, and road and utility line activities was evident. The pattern of contamination ranged from widespread to isolated spots and was found to occur from near the surface to depths of approx.1.8 m. The most highly contaminated region was noted on both sides of Latty Avenue adjacent to the former Cotter site. Concentrations of /sup 230/Th in soil from that region were as high as 16,000 pCi/g

Understanding Adolescents’ Experiences of Self-Harm: Secondary Analysis of Family Therapy Sessions from the SHIFT Trial

The objective of this study was to explore, using first-hand accounts, adolescents’ understandings of why they self-harmed, what their responses to self-harm were, and how they resisted or ceased self-harm. Secondary analysis was conducted of video-recorded family therapy sessions from the Self-harm Intervention: Family Therapy (SHIFT Trial). Recordings of 22 participants, approximately 170 hours of footage, formed the dataset. The study developed 5 core themes: (1) Distress can be difficult to convey; (2) Self-harm and suicidal ideation: a complex relationship; (3) Self-harm as a form of communication; (4) Self-harm to manage emotions; and (5) Moving forward. Self-harm was a means of communicating distress as well as managing emotions. Accounts highlighted the complex interplay between self-harm and suicidal intent. Encouragingly, many participants described being able to resist self-harm

Preliminary site survey report for the Sacandaga site, Glenville, New York

Of the numerous original buildings, only Building P, the Critical Assembly Building, remains standing. Front and rear views of the small, concrete block building are shown. The remaining structure is situated on /approximately/51 acres of land, most of which is covered by a heavy growth of trees and brush. An abundance of rubbish and dismantled structural materials is strewn throughout the site. It is estimated that the total inventory of radioactive materials in the site included /approximately/300 kg of uranium in the form of solid metal discs, /approximately/8 mg of plutonium on platinum discs covered with plastic, and /approximately/3 mg of radium sealed in a radium/beryllium source. Both /sup 238/U and /sup 235/U in solid metal form were used in experiments for breeder reactor studies. This type of assessment typically involves a two-stage process. The first part consists of a site visit and preliminary scoping survey to verify that no radiological hazard exists at a specific site, and to collect sufficient data to plan the second part of the process--the more comprehensive radiological survey. The preliminary radiological scoping survey discussed in this report was conducted. Compared to the large size of the property, the survey was limited in scope, including only the 5--6 acres enclosed within the fence and concentrating on those areas having the greatest possibility of containing residual radioactive material. 3 refs., 8 figs., 3 tabs