Gheorghe Marin

Cégep de Trois-Rivières, Québec, Canada

Consistent knowledge about the increment in European forests gained amplified importance in European policies and decision processes related to forest-based bioeconomy, carbon sequestration, sustainable forest management and environmental changes. Until now, large-area increment information from European countries was lacking international comparab...

Forest biomass is an essential resource in relation to the green transition and its assessment is key for the sustainable management of forest resources. Here, we present a forest biomass dataset for Europe based on the best available inventory and satellite data, with a higher level of harmonisation and spatial resolution than other existing data....

Additive manufacturing of titanium parts is a market that has been growing significantly for the past decade. The intricate geometry that the technique offers pushes the growth of the process. However, reclaiming the unused powders from the powder bed is limited because offcuts are generated by the laser that sinters and agglomerates powders near t...

Wood resources have been essential for human welfare throughout history. Also nowadays, the volume of growing stock (GS) is considered one of the most important forest attributes monitored by National Forest Inventories (NFIs) to inform policy decisions and forest management planning. The origins of forest inventories closely relate to times of ear...

The quantification of forests available for wood supply (FAWS) is essential for decision-making with regard to the maintenance and enhancement of forest resources and their contribution to the global carbon cycle. The provision of harmonized forest statistics is necessary for the development of forest associated policies and to support decision-mak...

Aluminium A356 (AlSi7Mg03) is the most common foundry alloy poured in sand and permanent molds or lost-wax shells. Because of its magnesium content, this alloy responds to a precipitation hardening treatment. The strength and ductility combination of the alloy can be varied at will by changing the temper treatment that follows the solutionizing and...

• Key message A dataset of forest resource projections in 23 European countries to 2040 has been prepared for forest-related policy analysis and decision-making. Due to applying harmonised definitions, while maintaining country-specific forestry practices, the projections should be usable from national to international levels. The dataset can be ac...

Correction to: Annals of Forest Science https://doi.org/10.1007/s13595-019-0863-6 The original article was erroneously published without applying all the provided proof corrections in Section 5 and Table 1. The original article has been updated to render Table 1 and Section 5 correctly. The original article has been corrected.

Key message Volume predictions of sample trees are basic inputs for essential National Forest Inventory (NFI) estimates. The predicted volumes are rarely comparable among European NFIs because of country-specific dbh-thresholds and differences regarding the inclusion of the tree parts stump, stem top, and branches. Twenty-one European NFIs implemen...

Accurate carbon-balance accounting in forest soils is necessary for the development of climate change policy. However, changes in soil organic carbon (SOC) occur slowly and these changes may not be captured through repeated soil inventories. Simulation models may be used as alternatives to SOC measurement. The Yasso07 model presents a suitable alte...

In Romania 30% of the land area is covered with forests. The main forest types are beech, spruce, fir, mixtures of beech with conifers or broadleaves. Until 1991, the entire national forest area was under state ownership. However, after 1990 forest restitution law allowed the distribution of forests among different types of ownership. Nevertheless,...

Forest inventory in Romania started in 1959 by aggregating management planning information from forest districts assessed during the period 1948-1958 for all Romanian forest fund land.

The supply of wood in Europe on a sustainable basis is highly relevant for forestry and related policies, particularly in relation to (i) analysing global change mitigation strategies and carbon accounting (ii) establishing realistic forecasts and targets for wood resources, biomass and renewable energy and (iii) assessing and supporting strategies...

Background The quantitative impact of forest management on forests’ wood resource was evaluated for Picea and Fagus mixed forests. The effects on the productivity of tendering operations, thinnings and rotation length have seldom been directly quantified on landscape scale. Methods Two sites of similar fertility but subject to contrasted forest man...

Context: Knowledge on stem quality and assortments structure in European forests is highly important for policy makers and the timber industry, but also for carbon life cycle analysis due to the fact that different timber products have different end use and thus store carbon for different time periods. Aims: The study aim was to evaluate the poten...

Key message This analysis of the tools and methods currently in use for reporting woody biomass availability in 21 European countries has shown that most countries use, or are developing, National Forest Inventory-oriented models whereas the others use standwise forest inventory--oriented methods. Context Knowledge of realistic and sustainable wood...

Molten titanium has a strong reaction with most of the refractories used for mold building in investment casting. Calcia partially stabilized zirconia (PSZ) used as a facecoat material has a reduced reaction with molten titanium and is still offered at an affordable cost. However poor process control can greatly impair the formation of a thin alpha...

Hypoeutectic aluminum alloys such as A356.0 (Al-7Si-0.3Mg) are usually subjected to strontium additions in order to obtain a chemically modified eutectic morphology. The modification of the eutectic silicon from sharp acicular plates to a fibrous structure is normally applied to improve the alloy ductility. However, strontium additions are relative...

Alpha case presence on titanium parts that are produced by investment casting is problematic and has to be removed. Metallographic measurements and micro-hardness profiles are the traditional techniques used to evaluate its thickness. However, to obtain a better understanding of how the alpha case is formed and with the underlying objective of limi...

Grid-based inventories of 1,924 deciduous forests plots in Germany and 4,775 in Romania were used to investigate tree species composition as affected by browsing and grazing under different forest management (rotation forestry, selectively cut forest, protected forest). At regional scale, the loss of tree species in the dominant layer was between 5...

The availability of long-term land datasets is fundamental to ensure consistent and accurate national greenhouse gas inventories for land use and land use changes. Estimation of Romania’s CO2removals and emissions over 1970-2010 was assessed comparatively by using National Statistics (as reference dataset), Corine Land Cover data, as well as four a...

Given the high added value of titanium castings, rejecting a part is a very costly proposition; the option of repairing the casting is often the most economical alternative. For internal defects, as porosity, the application of a hot isostatic pressing (HIP) cycle greatly diminish the cost of such repairs by bringing the defect at the part surface....

The presence of an alpha case on titanium parts produced by investment casting is problematic and has to be eliminated. The evaluation of the thickness to be removed can be done using different techniques such as metallographic measurements, microhardness profiles and electron microprobe analyzer (EMPA) linescans. Those three techniques measure dif...

Calcia partially stabilized zirconia (PSZ) base slurries have become widely used in titanium investment casting foundries due to the combination of a limited metal shell reaction and a good average slurry life. However, tight control of slurries parameters and dipping sequence are required to minimize the formation of the alpha case. The paper desc...

Recycling of titanium represents an important economic activity due to high cost of the material and the amount of returns of machined parts which represent the bulk of finished titanium products (typical "buy to fly" of 10 in the aeronautic industry). In the present work, the metallurgical quality of 76 mm in diameter and 20 cm ingots poured in co...