Risks in the design of regional hydrogen hub systems: A review and commentary.

Early investments in regional hydrogen systems carry two distinct types of risk: (1) economic risk that projects will not be financially viable, resulting in stranded capital, and (2) environmental risk that projects will not deliver deep reductions in greenhouse gas emissions and through leaks, perhaps even contribute to climate change. This article systematically reviews the literature and performs analysis to describe both types of risk in the context of recent efforts in the United States and worldwide to support the development of "hydrogen hubs" or regional systems of hydrogen production and use. We review estimates of hydrogen production costs and projections of how future costs are likely to change over time for different production routes, environmental impacts related to hydrogen and methane leaks, and the availability and effectiveness of carbon capture and sequestration.

Plantar Pressure Variations Induced by Experimental Malocclusion-A Pilot Case Series Study.

Background: All body systems involved in ensuring a healthy posture (musculoskeletal system, oculomotor, oto-vestibular and occluso-cranial-mandibular) are essential in maintaining postural balance.

Research Question: Does experimental malocclusion in subjects in static position determine variations in plantar pressure?

Methods: Overall, 31 subjects were included in the study. The plantar pressure was evaluated in five different points: lateral and medial heel, midfoot, 1st and 5th metatarsal area.

On Different Formulations of a Continuous CTA Model.

In this paper, we consider a Controlled Tabular Adjustment (CTA) model for statistical disclosure limitation of tabular data. The goal of the CTA model is to find the closest safe (masked) table to the original table that contains sensitive information. The measure of closeness is usually measured using or norm.

Multivariate Top-Coding for Statistical Disclosure Limitation.

One of the most challenging problems for national statistical agencies is how to release to the public microdata sets with a large number of attributes while keeping the disclosure risk of sensitive information of data subjects under control. When statistical agencies alter microdata in order to limit the disclosure risk, they need to take into account relationships between the variables to produce a good quality public data set. Hence, Statistical Disclosure Limitation (SDL) methods should not be univariate (treating each variable independently of others), but preferably multivariate, that is, handling several variables at the same time.

Grouping of variables to facilitate statistical disclosure limitation methods in multivariate data sets.

Data sets that are subject to Statistical Disclosure Limitation (SDL) often have many variables of different types that need to be altered for disclosure limitation. To produce a good quality public data set, the data protector needs to account for the relationships between the variables. Hence, ideally SDL methods should not be univariate, that is, treating each variable independently of others, but multivariate, handling many variables at the same time.

Effects of combination therapy: somatostatin analogues and dopamine agonists on GH and IGF1 levels in acromegaly.

Background And Aims: Acromegaly is a complex endocrine disorder caused by excessive secretion of GH, secondary to a GH secreting pituitary adenoma or a mixed pituitary adenoma secreting GH and PRL.

Methods: The aim of this study was to evaluate the effects of combination therapy: dopamine agonist and somatostatin analogue on GH and IGF1 levels in a group of 30 patients with acromegaly. Cabergoline in a dose of 2 mg/week and 4 mg/week respectively was associated with Sandostatin LAR in a dose of 20 mg/month and 30 mg/months respectively.

[Epidemiological evaluations of the incidence of posttransfusion hepatitis in Iaşi County in 1985-1995].

In the interval 1985-1995 the morbidity rate of viral hepatitis of various causes showed yearly variations, an average of 181 cases being recorded. The performed investigations revealed markers for viral hepatitis B in an yearly average of 154 cases for the 11 years under study. Posttransfusion hepatitis had an average incidence of 43 cases per year, in 59.