The intracellular fluid compartment is smaller than commonly believed when measured by whole-body bioimpedance

Objectives To report our data on the total body water (TBW), intracellular volume (ICV), extracellular volume (ECV), and fat-free mass (FFM) from studies using whole-body bioimpedance (BIA) with the aim of contrasting them to commonly cited reference values. Methods Data were retrospectively retrieved from three single-center studies of adult healthy male volunteers and one study of women scheduled for abdominal hysterectomy where multifrequency BIA had been applied to obtain measurements of TBW, ICV, ECV, and FFM. Results Based on measurements performed in 44 males, the TBW, ICV, ECV, and FFM represented 49.1 (4.9)%, 23.32 (3.1)%, 25.8 (2.2)%, and 67.4 (7.4)% of the BW, respectively (mean, SD). In 15 females, these volumes were 40.4 (4.5)%, 18.0 (2.1)%, 22.4 (2.6)%, and 55.6 (6.1)% per kg BW, respectively. The deviation of these measurements from the reference values increased linearly with body weight and age. Conclusions Body fluid volumes indicated by BIA showed that TBW amounted to 80% of the reference volume, which is 60% per kg BW in adult males. The ratio between the ICV and the ECV was approximately 1:1, while this ratio is traditionally reported to be 2:1.

Limits to the Validity of Thermal-Pressure Equations of State

Thermal-pressure Equations of State (EoS) such as the Mie-Grüneisen-Debye (MGD) model depend on several assumptions, including the quasi-harmonic approximation (QHA) and a simplified phonon density of states. We show how the QHA is violated by materials exhibiting anisotropic thermal pressure. We also show that at pressures lower than those of the isochor of the reference volume, the static pressure may become sufficiently negative to make the compressional part of the EoS invalid. This limit is sensitive to the combined effects of the EoS parameters K’0, q and the Grüneisen parameter γ0. Large values of q, which correspond to a rapid decrease in phonon mode frequencies with increasing volume, can also lead to the bulk modulus becoming zero at high pressures and temperatures that are not particularly extreme for planetary geotherms. The MGD EoS therefore has an extremely limited P and T regime over which it is both valid and has physically-meaningful properties. Outside of this range, additional terms should be included in the thermal pressure that represents the physical properties of the solid. Or, alternatively, ‘isothermal’ EoS in which the temperature variation of the elastic properties is explicitly modeled without reference to a physical model can be used.

Anniversaries of our journal

Our journal in 2019 celebrates a double anniversary: the publication of 50th volume and the centenary of the beginning of its predecessor — the series “Notulae systematicae ex Herbario Horti botanici Petrololitani” (= “Botanicheskiye materialy Gerbariya Glavnogo Botanicheskogo Sada RSFSR”). “Notulae systematicae…” was founded in 1919 and was published (intermittently) until 1963. Outstanding Russian botanists B. A. Fedtschenko, V. L. Komarov, B. K. Schischkin were its editors. 22 volumes containing 756 articles and notes (plus reference volume) were published. “Novitates systematicae plantarum vascularium” (= “Novosti sistematiki vysshikh rastenii”) became a natural continuation of the “Notulae systematicae…”, the series was edited by I. A. Linczevsky, V. I. Grubov, T. V. Egorova, N. N. Tzvelev. Nowadays, the editorial board seeks to find the place of the journal in the Russian and world system of botanical periodicals, to ensure its inclusion in authoritative international citation systems. Keeping traditions, we strive to more correspond to the modern style of international publications on the vascular plants taxonomy.

Introduction

The Oxford Handbook of Endangered Languages’ purposes are (1) to provide a reasonably comprehensive reference volume for endangered languages, with the scope of the volume as a whole representing the breadth of the field; (2) to highlight both the range of thinking about language endangerment and the variety of responses to it; and (3) to broaden understanding of language endangerment, language documentation, and language revitalization, and, in so doing, to encourage and contribute to fresh thinking and new findings in support of endangered languages. This chapter introduces the thirty-nine chapters of this Handbook, which are addressed to the themes and approaches in scholarship on endangered language and to these objectives of the book. The authors introduce the criteria for determining whether a language is endangered and just how endangered it is, address the causes of language endangerment, review the reasons for why the language endangerment crisis matters, and discuss the variety of responses to it.

The Oxford Handbook of Endangered Languages

The Oxford Handbook of Endangered Languages, in thirty-nine chapters, provides a comprehensive overview of the efforts that are being undertaken to deal with this crisis. Its purposes are (1) to provide a reasonably comprehensive reference volume, with the scope of the volume as a whole representing the breadth of the field; (2) to highlight both the range of thinking about language endangerment and the variety of responses to it; and (3) to broaden understanding of language endangerment, language documentation, and language revitalization, and, in so doing, to encourage and contribute to fresh thinking and new findings in support of endangered languages. The handbook is organized into five parts. Part I, Endangered Languages, addresses some of the fundamental issues that are essential to understanding the nature of the endangered languages crisis. Part II, Language Documentation provides an overview of the issues and activities of concern to linguists and others in their efforts to record and document endangered languages. Part III, Language Revitalization encompasses a diverse range of topics, including approaches, practices, and strategies for revitalizing endangered and sleeping (“dormant”) languages. Part IV, Endangered Languages and Biocultural Diversity, extends the discussion of language endangerment beyond its conventional boundaries to consider the interrelationship of language, culture, and environment. Part V, Looking to the Future, addresses a variety of topics that are certain to be of consequence in future efforts to document and revitalize endangered languages.

Calculation of stress in FGM beams

Content of the paper is oriented to calculation of elastic normal stress in the Functionally Graded Beams (FGM). Spatial variation of material properties is considered in the lateral, transversal and longitudinal direction of the straight beam. The displacements and internal forces are calculated using our new FGM finite beam element. Heterogeneous material properties are homogenized by extended mixture rules, laminate theory and reference volume element (RVE). Obtained results by our approach are evaluated and compared with the ones obtained by the 3D solid finite elements.

Regional tidal lung strain in mechanically ventilated normal lungs

Parenchymal strain is a key determinant of lung injury produced by mechanical ventilation. However, imaging estimates of volumetric tidal strain (ε = regional tidal volume/reference volume) present substantial conceptual differences in reference volume computation and consideration of tidally recruited lung. We compared current and new methods to estimate tidal volumetric strains with computed tomography, and quantified the effect of tidal volume (VT) and positive end-expiratory pressure (PEEP) on strain estimates. Eight supine pigs were ventilated with VT = 6 and 12 ml/kg and PEEP = 0, 6, and 12 cmH2O. End-expiratory and end-inspiratory scans were analyzed in eight regions of interest along the ventral-dorsal axis. Regional reference volumes were computed at end-expiration (with/without correction of regional VT for intratidal recruitment) and at resting lung volume (PEEP = 0) corrected for intratidal and PEEP-derived recruitment. All strain estimates demonstrated vertical heterogeneity with the largest tidal strains in middependent regions ( P < 0.01). Maximal strains for distinct estimates occurred at different lung regions and were differently affected by VT-PEEP conditions. Values consistent with lung injury and inflammation were reached regionally, even when global measurements were below critical levels. Strains increased with VT and were larger in middependent than in nondependent lung regions. PEEP reduced tidal-strain estimates referenced to end-expiratory lung volumes, although it did not affect strains referenced to resting lung volume. These estimates of tidal strains in normal lungs point to middependent lung regions as those at risk for ventilator-induced lung injury. The different conditions and topography at which maximal strain estimates occur allow for testing the importance of each estimate for lung injury.

Benevolence and Justice in Extraction Economies

Roland Boer’s work on the sacred economy of ancient Israel will become a standard reference volume for years to come. Boer reframes our understanding of Israel’s economy around Marx’s notion of régulation, the distinction between allocative and extractive economies, and patterns of subsistence survival at the village level. While this response celebrates Boer’s work, it suggests that more attention be given to the negative aspects of extraction economies, in particular to subsistence survival, and to the role of women and children in this economy. It also notes that Boer’s description of wisdom literature as reflecting the voices of the ruling elite in their attempt to control the servant class might be balanced by more attention to the wisdom literature where God becomes an advocate for the poor.

Measurement of snow cover depth using 100 × 100 meters sampling plot and Structure from Motion method in Adventdalen, Svalbard

We tried to verify the concept of Structure from Motion method for measuring the volume of snow cover in a grid of 100×100 m located in Adventdalen, Central Svalbard. As referencing method we utilized 121 depth measurements in one hectare area. Using avalanche probe a snow depth was measured in mentioned 121 nodes of the grid. We detected maximum snow depth of 2.05 m but snowless parts as well. From gathered depths’ data we geostatistically (ordinary kriging) interpolated snow surface model which we used to determine reference volume of snow at research plot (5 569 m3). As a result, we were able to calculate important metrics and analyze topography and spatial distribution of snow cover at the plot. For taking photos for Structure from Motion method, bare pole in hands with a camera mounted was used. We constructed orthomosaic of research plot.