Deconvolution of directly precipitating and trap-precipitating electrons in solar flare hard x-rays. III.Yohkoh hard x-ray telescope data analysis

We analyze the footpoint separation d and flux asymmetry A of magnetically conjugate double footpoint sources in hard X-ray images from the Yohkoh Hard X-Ray Telescope (HXT). The data set of 54 solar flares includes all events simultaneously observed with the Compton Gamma Ray Observatory (CGRO) in high time resolution mode. From the CGRO data we deconvolved the direct-precipitation and trap-precipitation components previously (in Paper II). Using the combined measurements from CGRO and HXT, we develop an asymmetric trap model that allows us to quantify the relative fractions of four different electron components, i.e., the ratios of direct-precipitating (q_P1, q_P2) and trap-precipitating electrons (q_T1, q_T2) at both magnetically conjugate footpoints. We find mean ratios of q_P1=0.14+/-0.06, q_P2=0.26+/-0.10, and q_T=q_T1+q_T2=0.60+/-0.13. We assume an isotropic pitch-angle distribution at the acceleration site and double-sided trap precipitation (q_T2/q_T1=q_P2/q_P1) to determine the conjugate loss-cone angles (alpha_1=42^deg+/-11^deg and alpha_2=52^deg+/-10^deg) and magnetic mirror ratiosat both footpoints (R_1=1.6,...,4.0 and R_2=1.3,...,2.5). From the relative displacement of footpoint sources we also measure altitude differences of hard X-ray emission at different energies, which are found to decrease systematically with higher energies, with a statistical height difference of h_Lo-h_M1=980+/-250 km and h_M1-h_M2=310+/-300 km between the three lower HXT energy channels (Lo, M1, M2

Прогностическая значимость плацентарной васкуляризации у беременных при низкой плацентации

БЕРЕМЕННОСТИ ОСЛОЖНЕНИЯКРОВООБРАЩЕНИЕПЛАЦЕНТАРНАЯ НЕДОСТАТОЧНОСТ

The Weak Blue Bump of H2106-099 and AGN De-Reddening

We present multi-frequency spectra of the Seyfert 1 galaxy H2106-099, from radio to hard X-rays, spanning over a decade of observations. The hard X-ray (2-20 keV) spectrum measured with Ginga had a Log slope of -0.80 +/- 0.02 on 1988 May 18 and -1.02 +/- 0.10 on 1988 May 22 / 23 UT, with no observed flux changes. Other measurements showed variability and unusual spectral features: The V band flux changed by a factor of 1.8 (> 10 sigma) in six weeks. Only moderate optical Fe II emission is present, but strong [FeVII] and [Fe X] lines are present in some epochs. The Balmer lines show > 25% variations in flux relative to the mean, and He I changed by more than 100% relative to the mean in <~ six years. The most surprising finds came from the composite UV through near-IR spectrum: If the spectrum is de-reddened by the galactic extinction value (from 21 cm observations), a residual 2175 Angstrom absorption feature is present. Additional de-reddening to correct the feature yields E(B-V)=0.07 mag due to material outside our galaxy, most probably associated with the AGN or its host galaxy. No other clear indications of reddening are observed in this object, suggesting that blue bump strength measurements in low and intermediate red-shift AGN could be incorrect if derived without UV observations of the region near 2175 Angstrom in the AGN frame. After all reddening corrections are performed, the log slope of H2106-099 from the near IR (~12500 Angstrom) to the UV (~1400 Angstrom), -0.94 +/- 0.05, is steep compared to other AGN, suggesting that the blue bump in this object is intrinsically weak. Weak blue bumps are, therefore, not always an artifact caused by reddening.Comment: Three parts: A. 33 pages text, B. one landscape table, C. 8 figure

Dispute Resolution under a North American Free Trade Agreement

dispute resolution and North American Free Trade Are

Comparison of Design Research on Manufacturing Firms Moving Towards Services

Corresponding to a steadily advancing integration of roducts and service operations in the manufacturing industry, a number of research groups within the design community are working with issues of integrated product and service development. Although closely related, the evolving groups focus on different research dimensions, and thus the terminologies and concepts used in research contributions are not fully compatible. This research attempts to promote and support an evolving collaboration between the different research groups within the design community, by analysing and comparing the key contribution areas of three of the existing groups, namely the groups of Integrated Product and Service Engineering, Service/Product Engineering and Product/Service-System development. A review of the groups’ research contributions is carried out and the main characteristics’ of their research is compared. Furthermore a comparative table of concepts and terms used in the contributions of the three groups in compiled. Based on this comparison, 3 focal research dimensions are identified: the product lifecycle dimension, the customer lifecycle dimension and the provider lifecycle dimension. Finally the research domains’ linkages to other related research domains outside the design community are identified

Towards a Roadmap for a Resource Efficient and Effective Manufacturing Industry in Sweden

The transition to a resource efficient economy that makes effective use of raw materials and energy is a multi-level dynamic process requiring a wide systems perspective. To operationalize this transition in a holistic manner, the concept of Circular Economy (CE) has been championed by major economies around the world. The idea with CE is to strive towards maximizing the utilization of products, components and materials and their embedded material value throughout the economy, generating the lowest possible amount of loss and waste in relation to the obtained value. This contribution presents the main elements for a transition roadmap towards CE in the Swedish manufacturing sector. This paper presents (i) a baseline of resource efficiency operations in Sweden and existing strategies for CE transition in the EU; (ii) outlines major areas of opportunity for the Swedish manufacturing sector to innovate and create resource efficient and effective solutions; (iii) identifies a variety of stakeholders that are required to intervene in different levels (local/regional/national/international, as well as public/private), scales and timeframes; and (iv) presents a comprehensive set of actions and policies, including monitoring and evaluation, as a direct recommendation to political and business actors in Sweden. Finally, milestones are defined and a timeframe for the roadmap is proposed

Determinants of an elevated pulmonary arterial pressure in patients with pulmonary arterial hypertension

Given the difficulty of diagnosing early-stage pulmonary arterial hypertension (PAH) due to the lack of signs and symptoms, and the risk of an open lung biopsy, the precise pathological features of presymptomatic stage lung tissue remain unknown. It has been suggested that the maximum elevation of the mean pulmonary arterial pressure (Ppa) is achieved during the early symptomatic stage, indicating that the elevation of the mean Ppa is primarily driven by the pulmonary vascular tone and/or some degree of pulmonary vascular remodeling completed during this stage. Recently, the examination of a rat model of severe PAH suggested that the severe PAH may be primarily determined by the presence of intimal lesions and/or the vascular tone in the early stage. Human data seem to indicate that intimal lesions are essential for the severely increased pulmonary arterial blood pressure in the late stage of the disease. However, many questions remain. For instance, how does the pulmonary hemodynamics change during the course of the disease, and what drives the development of severe PAH? Although it is generally acknowledged that both pulmonary vascular remodeling and the vascular tone are important determinants of an elevated pulmonary arterial pressure, which is the root cause of the time-dependent progression of the disease? Here we review the recent histopathological concepts of PAH with respect to the progression of the lung vascular disease