Auditing and property rights

This is the official published version. Copyright @ 2004 RANDThird-party audit provides incentives to an agent whose actions affect the value of an asset. When audit intensity and outcome are unverifiable, we show that with interim-participation constraints the optimal mechanism may use only the auditor's report, disregarding the agent's information. Furthermore, the auditor obtains the asset and the agent a monetary compensation, when a high asset value is reported. This suggests regulating renewable resources or utility networks by giving entrants the option to buy the right to use the asset at a predetermined price, and financially rewarding incumbents for good performance.The second author used financial support of the Communaute francaise de Belgique (projet ARC 98/03-221) and EU TMR Network contract no. FMRX-CT98-0203

Production And Studies Of Photocathodes For High Intensity Electron Beams

For short, high-intensity electron bunches, alkali-tellurides have proved to be a reliable photo-cathode material. Measurements of lifetimes in an RF gun of the CLIC Test Facility II at field strengths greater than 100 MV/m are presented. Before and after using them in this gun, the spectral response of the Cs-Te and Rb-Te cathodes were determined with the help of an optical parametric oscillator. The behaviour of both materials can be described by Spicer's 3-step model. Whereas during the use the threshold for photo-emission in Cs-Te was shifted to higher photon energies, that of Rb-Te did not change. Our latest investigations on the stoichiometric ratio of the components are shown. The preparation of the photo-cathodes was monitored with 320 nm wavelength light, with the aim of improving the measurement sensitivity. The latest results on the protection of Cs-Te cathode surfaces with CsBr against pollution are summarized. New investigations on high mean current production are presented.Comment: Submission to LINAC2000 conference, Paper number MOB08, 3 pages, 6 figure

In vitro susceptibility of 120 strains of Neisseria gonorrhoeae isolated in Kyrghyzstan.

BACKGROUND: The World Health Organization has established a worldwide program for gonococcal antimicrobial surveillance, but so far no data on gonococcal susceptibility in Central Asia are available. GOAL: The need for biological data on the susceptibility of Neisseria gonorrhoeae in Kyrghyzstan, to enable adaptation of the national treatment protocol for gonococcal infections, led Médecins Sans Frontières and Epicentre to conduct a survey in collaboration with the Alfred Fournier Institute in Paris and the health authorities in Bishkek. STUDY DESIGN: In vitro susceptibility of N gonorrhoeae strains was determined with use of the reference agar-plate dilution technique. RESULTS: Results for 11 antibiotics tested on 120 strains of gonococci showed a low proportion (11.7%) of penicillinase-producing N gonorrhoeae and high proportions of intermediate or resistant strains to the majority of the antibiotics tested, including fluoroquinolones (>or=25% of strains resistant). All the strains were susceptible to spectinomycin, and only two strains had decreased susceptibility to cefixime. CONCLUSION: The therapeutic choices available in Kyrghyzstan appear to be limited to cephalosporins and spectinomycin

EFFECTS OF A SUPRAMAXUMAL RUN TO EXHAUSTION ON RUNNING ECONOMY AND RUNNING KINEMATICS

The purpose of this study was to quantify total intra-individual variability in running economy (RE), Stride kinematics after a supramaximal run to exhaustion in French elite 400m runners. Ten runners took part in this study. All subjects had been following a training program for a minimum of 4 years and were experienced treadmill runners. They were selected after a maximal protocol to be homogeneous on V 02 max (63,5 * 2,l ml.kg-l.min -1 ) and on the speed reached with V02max (Vmax: 19 km.h-I). After completing a 15 rnin accommodation run, each subject performed a submaximal run, 6 rnin in length and 0% grade at 75% Vmax (14,5km.h-1). Following this run subjects completed a supramaximal run to exhaustion at 22 km.h-1 and 7% grade according to the protocol described by Schnabel and Kindermann (1983). Half an hour and one hour after this run, each subject repeated the 6 min submaximal run. During supramaximal run physiological parameters were continuously recorded. During each submaximal run, physiological parameters were recorded during the last 3 rnin and subjects were filmed between the second and the third minute. Stride rate was continuously recorded by an impact monitor fixed on the runner's right shoe. Results of physiological impact of the supramaximal run were in accordance with those found by Schnabel and Kindermann (1983) with the same population. Mean time to exhaustion was 98,2 * 16 sec and mean post exercise blood lactate peak was 16,71 * 2,31. No significant differences were found, after the supamaximal test, in running economy (39,8 vs 39,6 ml.kg-l.min-1, P>.05), and most of the stride kinematics with exception with plantar flexion at toe-off ( 70,9 vs 65,7 deg, P.05). The results of this study are in agreement with the study of Morgan et al. (1990) for a 30 rnin maximal run and moderately trained runners. It demonstrates that acute fatigue following a suparamaximal run to exhaustion does not increase the oxygen cost of submaximal running or alter stride kinematics over the short terzn. These results indicate, for elite runners and after a supramaximal run, the general stability of metabolic and kinematics parameters during a submaximal run. Key Words. Running economy, Stride Kinematics, Variability, Running

Third Party Monitoring and Golden Parachutes

When today’s actions can affect tomorrow’s value of an asset and when the principal does not have access to hard information, either about productive activity or monitoring activity, two incentive problems must be simultaneously solved: first, the ex ante moral hazard problem of inducing higher productive effort from the agent; second, the ex post problem of inducing auditing and revelation of information from the auditor. Somewhat surprisingly, the first best can be attained in the negative externality (higher effort decreases the expected future quality of the asset) case: it is enough for the principal to commit to reallocate the right to use the asset at the end of the first period. In the positive externality case (when higher effort increases the future expected quality of the asset) a change in the rights to use the asset is no longer sufficient for efficiency in the second best situation. Rather, auditing by a potential entrant becomes necessary and a mix of property rights reallocation and transfers is necessary to solve the two incentive problems. We show that the second best optimal takes the form of a generalized ‘golden parachute’ contract where for high outputs the agent is replaced by the third party and leaves with a fixed compensation

Eflornithine is Safer Than Melarsoprol for the Treatment of Second-Stage Trypanosoma Brucei Gambiense Human African Trypanosomiasis.

Patients with second-stage human African trypanosomiasis treated with eflornithine (n = 251) in 2003 in Kiri, southern Sudan, had an adjusted relative risk of death of 0.2 and experienced significantly fewer cutaneous and neurological adverse effects than did patients who were treated with melarsoprol in 2001 and 2002 (n = 708)

Adherence to the combination of sulphadoxine-pyrimethamine and artesunate in the Maheba refugee settlement, Zambia.

Artemisinin-based combination therapy (ACT) is one strategy recommended to increase cure rates in malaria and to contain resistance to Plasmodium falciparum. In the Maheba refugee settlement, children aged 5 years or younger with a confirmed diagnosis of uncomplicated falciparum malaria are treated with the combination of sulphadoxine-pyrimethamine (1 day) and artesunate (3 days). To measure treatment adherence, home visits were carried out the day after the last treatment dose. Patients who had any treatment dose left were considered certainly non-adherent. Other patients' classification was based on the answers to the questionnaire: patients whose caretakers stated the child had received the treatment regimen exactly as prescribed were considered probably adherent; all other patients were considered probably non-adherent. Reasons for non-adherence were assessed. We found 21.2% (95% CI [15.0-28.4]) of the patients to be certainly non-adherent, 39.4% (95% CI [31.6-47.6]) probably non-adherent, and 39.4% (95% CI [31.6-47.6]) probably adherent. Insufficient explanation by the dispenser was identified as an important reason for non-adherence. When considering the use of ACT, the issue of patient adherence remains challenging. However, it should not be used as an argument against the introduction of ACT. For these treatment regimens to remain efficacious on a long-term basis, specific and locally adapted strategies need to be implemented to ensure completion of the treatment

Imaging subsurface damage of grinded fused silica optics by confocal fluorescence microscopy

International audienceWe report an experimental investigation of fluorescence confocal microscopy as a tool to measure subsurface damage on grinded fused silica optics. Confocal fluorescence microscopy was performed with an excitation at the wavelength of 405 nm on fixed abrasive diamond grinded fused silica samples. We detail the measured fluorescence spectrums and compare them to those of oil based coolants and grinding slurries. We evidence that oil based coolant used in diamond grinding induces a fluorescence that marks the subsurface damages and eases its observation. Such residual traces might also be involved in the laser damage process

Foci of Schistosomiasis mekongi, Northern Cambodia: II. Distribution of infection and morbidity.

In the province of Kracheh, in Northern Cambodia, a baseline epidemiological survey on Schistosoma mekongi was conducted along the Mekong River between December 1994 and April 1995. The results of household surveys of highly affected villages of the East and the West bank of the river and of school surveys in 20 primary schools are presented. In household surveys 1396 people were examined. An overall prevalence of infection of 49.3% was detected by a single stool examination with the Kato-Katz technique. The overall intensity of infection was 118.2 eggs per gram of stool (epg). There was no difference between the population of the east and west shore of the Mekong for prevalence (P = 0.3) or intensity (P = 0.9) of infection. Severe morbidity was very frequent. Hepatomegaly of the left lobe was detected in 48.7% of the population. Splenomegaly was seen in 26.8% of the study participants. Visible diverted circulation was found in 7.2% of the population, and ascites in 0.1%. Significantly more hepatomegaly (P = 0.001), splenomegaly (P = 0. 001) and patients with diverted circulation (P = 0.001) were present on the west bank of the Mekong. The age group of 10-14 years was most affected. The prevalence of infection in this group was 71.8% and 71.9% in the population of the West and East of the Mekong, respectively. The intensity of infection was 172.4 and 194.2 epg on the West and the East bank, respectively. In the peak age group hepatomegaly reached a prevalence of 88.1% on the west and 82.8% on the east bank. In the 20 schools 2391 children aged 6-16 years were examined. The overall prevalence of infection was 40.0%, ranging from 7.7% to 72.9% per school. The overalls mean intensity of infection was 110.1 epg (range by school: 26.7-187.5 epg). Both prevalence (P = 0.001) and intensity of infection (P = 0.001) were significantly higher in schools on the east side of the Mekong. Hepatomegaly (55.2%), splenomegaly (23.6%), diverted circulation (4. 1%), ascites (0.5%), reported blood (26.7%) and mucus (24.3%) were very frequent. Hepatomegaly (P = 0.001), splenomegaly (P = 0.001), diverted circulation (P = 0.001) and blood in stool (P = 0.001) were significantly more frequent in schools of the east side of the Mekong. Boys suffered more frequently from splenomegaly (P = 0.05), ascites (P = 0.05) and bloody stools (P = 0.004) than girls. No difference in sex was found for the prevalence and intensity of infection and prevalence of hepatomegaly. On the school level prevalence and intensity of infection were highly associated (r = 0. 93, P = 0.0001). The intensity of infection was significantly associated only with the prevalence of hepatomegaly (r = 0.44, P = 0. 05) and blood in stool (r = 0.40, P = 0.02). This comprehensive epidemiological study documents for the first time the public health importance of schistosomiasis mekongi in the Province of Kracheh, Northern Cambodia and points at key epidemiological features of this schistosome species, in particular the high level of morbidity associated with infection