Untitled

Köhl, Michael; Traub, Berthold; Päivinen, Risto

doi:10.1023/a:1006257630216

Cited by 81 publications

(15 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It displays a zero at Q 2 = 5.0 GeV 2 and remains negative thereafter. Given that the deuteron is a weakly-bound J = 1 system, constituted from two fermions, and its electric form factor possesses a zero [255], it is unsurprising that G ρ E (Q 2 ) exhibits a zero. It is notable in addition that the deuteron's zero is located at z…”

Section: B Diquark and Meson Elastic And Transition Form Factorsmentioning

confidence: 99%

Collective Perspective on Advances in Dyson—Schwinger Equation QCD

Bashir¹,

Chang²,

Cloët³

et al. 2012

Commun. Theor. Phys.

331

405

View full text Add to dashboard Cite

We survey contemporary studies of hadrons and strongly interacting quarks using QCD's DysonSchwinger equations, addressing: aspects of confinement and dynamical chiral symmetry breaking; the hadron spectrum; hadron elastic and transition form factors, from small-to large-Q 2 ; parton distribution functions; the physics of hadrons containing one or more heavy quarks; and properties of the quark gluon plasma.

show abstract

Section: B Diquark and Meson Elastic And Transition Form Factorsmentioning

confidence: 99%

Collective Perspective on Advances in Dyson—Schwinger Equation QCD

Bashir¹,

Chang²,

Cloët³

et al. 2012

Commun. Theor. Phys.

331

405

View full text Add to dashboard Cite

show abstract

“…This process was launched and intensive harmonisation efforts were made under the COST Action E43 (COST 2010) followed by the most recent COST Action FP1001 (COST 2015), where reference definitions were proposed and harmonisation possibilities developed (Vidal et al 2008;Gschwantner et al 2009;McRoberts et al 2012;Ståhl et al 2012;Tomppo and Schadauer 2012;Tomter et al 2012). In general, all harmonisation efforts are based on bottom-up approach using existing inventory designs (Köhl et al 2000) in order to maintain the original targets of NFIs and aim at developing methods to provide comparable estimates (McRoberts et al 2009;; Fig. 3 Distribution of countries in which assortments are generated within their NFI …”

Section: Discussionmentioning

confidence: 99%

“…In Austria, taper functions and models for timber volume translation into the merchantable assortments have recently been developed reflecting the new grading standards in Austria (Eckmüllner et al 2007). Köhl et al (2000) recognises differences between harmonisation and standardisation. Harmonisation is defined as "to make or become harmonious or suitable, accommodate, adapt or agree" whilst he considers the standardisation as "to make to or regulate by a standard."…”

Section: Direct Assortments Estimation On Standing Trees In Nfismentioning

confidence: 99%

Stem quality assessment in European National Forest Inventories: an opportunity for harmonised reporting?

Bošeľa

Redmond²,

Kučera

et al. 2015

Annals of Forest Science

View full text Add to dashboard Cite

Abstract& Key message The potential of European National Forest Inventories to harmonise stem quality estimation in European forests was identified despite considerable differences in existing national approaches. & Context Knowledge on stem quality and assortments structure in European forests is highly important for policy makers and the timber industry and 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 potential of European National Forest Inventories (NFI) to objectively report on the stem quality in European forests in a harmonised manner. & Methods A comprehensive questionnaire was conducted as the first important step to evaluate the current status of stem quality assessment and assess the existing level of harmonisation. & Results Direct stem quality assessment or classification is used in 19 out of 28 European NFIs. Only eight countries provide timber assortment estimates from their NFIs. In addition, different sampling strategies for stem quality assessment are used among NFIs. Tree parameters relevant for stem quality assessment on standing trees were identified for the purpose of harmonisation. Several methods towards harmonisation between European NFIs for the purpose of reporting on stem quality of European forests were suggested. & Conclusion Current European NFIs are not capable of reporting the stem quality of European forests in a harmonised manner at this stage and considerable efforts will need to be taken before the harmonised stem quality estimation can be Handling Editor: Jean-Michel LebanContribution of the co-authors MB, JR and MK designed the study, performed the questionnaire study and wrote the manuscript; GM contributed in designing the questionnaire and revised the manuscript; GM, KK, AK, GK prepared a description of the timber quality assessment in their NFIs and revised the manuscript; RA, TG, CF and AL reviewed literature and revised the manuscript. prepared. However, the inquiry also revealed that there is a potential to develop the harmonised estimations in future. Electronic supplementary material

show abstract

“…(ii) Both programmes concentrated on the comparability of measurements, with special emphasis on crown condition (ICP-Forests) and chemical analyses (ICP-Forests and EANET). The activity in this field was valuable and permitted to document -and sometimes to control -measurement errors, which is an important component of the whole error budget of a given investigation (Köhl et al, 2000). Unfortunately, much less concern was given to other measurements (e.g.…”

Section: Discussionmentioning

confidence: 99%

Quality assurance (QA) in international forest monitoring programmes: activity, problems and perspectives from East Asia and Europe

Ferretti

König

Rautio³

et al. 2009

Ann. For. Sci.

View full text Add to dashboard Cite

Abstract• The quality of monitoring is defined by its ability to provide data that (i) allow estimates of the status of the target resource with defined precision level, (ii) permit change detection with defined power, and (iii) are comparable through space and time. To achieve these requirements a Quality Assurance (QA) perspective is essential.• To what extent QA was considered and data quality achieved in international forest monitoring programmes in East Asia and Europe? What is missing?• Past and present QA activity in forest monitoring in East Asia and Europe revealed that most attention was given to evaluate and promote comparability of measurements, with special emphasis on analytical chemistry. Much less attention was given to field sampling and to the overall monitoring design. QA approaches were unbalanced among the various investigations, and several problems with data comparability remained over years.• Despite considerable work on data quality control, parts of the monitoring process are still poorly covered by QA and revealed weaknesses in design and implementation. More comprehensive, formal and stringent QA procedures are necessary in international monitoring initiatives. Steps currently being undertaken for a more comprehensive QA approach are presented. Mots-clés :Asie de l'Est / Europe / surveillance des forêts / assurance qualité Résumé -L'assurance qualité (AQ) dans les programmes de surveillance des forêts : activités, problèmes et perspectives pour l'Asie de l'Est et l'Europe.• La qualité de la surveillance est définie par sa capacité à fournir des données qui (i) permettent des estimations de l'état de la ressource cible, définie à un niveau de précision, (ii) permettent la détection des changements de puissance définie et (iii) sont comparables à travers l'espace et le temps. Pour satisfaire à ces exigences d'assurance qualité (QA) la perspective est essentielle.• Dans quelle mesure l'assurance qualité a été examinée de même que la qualité des données obtenues dans les programmes internationaux de surveillance des forêts en Asie de l'Est et l'Europe ? Qu'est-ce qui manque ?• L'activité passée et présente dans l'assurance qualité de surveillance des forêts en Asie de l'Est et Europe a révélé que la plus grande attention a consisté à évaluer et promouvoir la comparabilité des mesures, avec un accent particulier sur la chimie analytique. Beaucoup moins d'attention a été accordée à l'échantillonnage sur le terrain et au modèle de surveillance globale. Les approches de QA ont été déséquilibrées entre les différentes enquêtes, et plusieurs problèmes avec la comparabilité des données sont restés au fil des années.• Malgré un travail considérable sur la qualité des données de contrôle, des parties du processus de suivi sont encore mal couvertes par l'assurance qualité et des lacunes de conception et de mise en oeuvre ont été révélées. Des procédures d'assurance qualité plus complètes, structurées et rigoureuses sont nécessaires dans les initiatives internationales de surveillance. Les étapes ac...

show abstract

Untitled

Cited by 81 publications

References 15 publications

Collective Perspective on Advances in Dyson—Schwinger Equation QCD

Collective Perspective on Advances in Dyson—Schwinger Equation QCD

Stem quality assessment in European National Forest Inventories: an opportunity for harmonised reporting?

Quality assurance (QA) in international forest monitoring programmes: activity, problems and perspectives from East Asia and Europe

Contact Info

Product

Resources

About