Search results for "Logging"

The influence of pulsed redox conditions on soil phosphorus

2010

Abstract. The effects of eleven pulsed reduction-oxidation cycles (20 and 2 days, respectively) on soil phosphorus (P) dynamics are compared for 12 soils having contrasting properties and overfertilised with respect to P. Incubation conditions simulated transient waterlogging of the soil profile and involved repeated sampling and analysis of both the solution and solid phase P forms. An initial increase in P concentration occurred upto and including the fourth full cycle was followed by a sharp decline in concentration for all but one soil. Accompanying changes in the main extractable forms of P, which appeared to be cumulative, could be summarised as a general decline in the organic P frac…

The Preservation of Sicilian Forests with Poorly Mechanized Logging Processes

1997

Abstract In the province of Agrigento (Sicily), owing to lack of funds, machinery and permanently employed workers, it is necessary to forecast costs and time required for thinning out about 1500 ha of artificial forest using only chain saws and temporarily employed manpower. This study was made to find out how costs and labour productivity vary with tree species, age, size, forest density, land orography and ground uneveness, in order to decide in which areas the change from artificial to natural forest, by gradually thinning out the non-autochthonous trees, could be done at the least cost. Logging processes have been monitored at nine different test sites of about 1 ha each. The results s…

Effort in Semi-Automatized Subtitling Processes

2020

The presented study investigates the impact of automatic speech recognition (ASR) and assisting scripts on effort during transcription and translation processes, two main subprocesses of interlingual subtitling. Applying keylogging and eye tracking, this study takes a first look at how the integration of ASR impacts these subprocesses. 12 professional subtitlers and 13 translation students were recorded performing two intralingual transcriptions and three translation tasks to evaluate the impact on temporal, technical, and cognitive effort, and split-attention. Measures include editing time, visit count and duration, insertions, and deletions. The main findings show that, in both tasks, ASR…

The language-(in)dependence of writing skills: translation as a tool in writing process research and writing instruction

2014

A pilot study was conducted in which 6 students with L1 German had to produce a German version of a text they had composed in their L2 English. The goals were to explore (a) in what respects the ability of advanced university English students to express themselves in their L2 English differs from their ability to do so in their L1 German, and (b) for which aspects of writing the implementation of translation exercises is useful as a tool to improve writing skills. The methods of data collection used were think-aloud and keystroke logging. In the analysis, special emphasis was placed on text-level errors as opposed to formal, lexical and grammatical errors. In their L1 versions, students wer…

The value of academics’ research-related online writing

2020

Research productivity indicators tend to ignore online and social media writing of academics, nevertheless, many academics for instance tweet and blog. It thus seems that there is additional value for writing in these genres. This study sets out to explore what roles writing in these hybrid online genres plays in relation to academics’ research activities. Drawing on in-depth research interviews with 29 academics with various L1s from three different disciplines, the study focuses on the participants’ perceptions of tweeting and blogging, and how they value writing in these genres in relation to core research-writing genres in their fields. Besides some differences in the evaluations betwee…

Dendro-archaeological contribution to the history of forest exploitation. The case of the Gallo-Roman settlement of Odenburg (Alsace, France) between…

2010

Dendro-archaeological contribution to the history of forest exploitation: a case of the Gallo-Roman settlement of Oedenburg (Alsace, France) between …

2011

International audience

Influence of wood harvest on tree-ring time-series of Picea abies in a temperate forest

2012

Tree-ring width data are the prime source of high-resolution climate reconstructions covering recent mil- lennia. Their variations, from year-to-year, are calibrated against regional instrumental data to evaluate the strength of associations with temperature and precipitation records, though the level of variance explained by climatic variables is frequently less than 50%. Among the remaining factors affecting tree growth, the influence of forest management for tree-ring width time-series used to resolve annual climate reconstructions remains relatively unexplored. We here evaluate the impact of conventional single-tree harvesting on tree-ring data using a compilation of circumstantially ma…

Effects of harvesting timber stands on goshawk nesting in two European areas

2001

We evaluated the effects of harvesting timber stands on goshawk (Accipiter gentilis) nesting in two European areas (central Italy and eastern France), by studying their occupancy and reproductive performance. We found no difference in the productivity of goshawk pairs reproducing in unlogged vs. logged stands. When considering the same nesting stand, before and after timber harvesting, we noted no differences in the number of young per breeding pair nora year effect. We observed that 87.5% of goshawk pairs nesting in logged stands moved away only when the original stand structure was altered by > 30%, and then only to the nearest neighbouring mature stand (maximum distance ca. 1.5 km). The …

Impact Assessment of Skidding Extraction: Effects on Physical and Chemical Properties of Forest Soils and on Maple Seedling Growing along the Skid Tr…

2019

Several studies investigated soil disturbances caused on skid trails by forest logging. However, there is still a lack of knowledge about the severity and the distance of disturbances along both sides from the trails. The aims of this study were: i) to investigate the changes in physical and chemical properties of soil along the sides of skidding trails