The Bologna process – a challenge to innovation in forest policy and economics education and research

The Bologna process will thrust forestry and forestry education into the context of an evolving global economy as well as worldwide concerns about environmental protection and climate change. It stimulates the integration of forestry into the framework of sustainable land-use practices and the combination of forest management experience with new scientific knowledge and research methodology. Forest professionals need a comprehensive educational background if they are to tackle rapidly changing social, economic and political problems. At the same time they need to understand the evolving and locally specific social and cultural aspects of forestry. This demands a joint approach to forest management, environment protection and landscape conservation. Maintaining the natural resource base and managing forests in a sustainable manner will require teaching programme combining policy and law, business economics and management, and forest resource and environmental economics components.Болонський процес призводить лісове господарство і лісову освіту в контекст розвитку глобальної економіки, а також всесвітньої турботи про захист середовища та зміни клімату. Це стимулює інтеграцію лісового господарства у мережу невиснажливого землекористування і поєднання досвіду лісового господарства та нових наукових знань і методології досліджень. лісовим професіоналам потрібні всебічні загальноосвітні знання, якщо вони мають утриматися на тлі швидко мінливих соціальних, економічних і політичних проблем. У той же час їм потрібно зрозуміти локальні й культурні аспекти лісового господарства, що розвивається. Це потребує об'єднаного підходу до управління лісами, захисту довкілля і збереження ландшафтів. Для підтримки основи природних ресурсів і лісів, в яких ведеться господарство, у невиснажливій формі необхідна викладацька програма, що об’єднує політику, закон, ділову економіку і управління, складові лісових ресурсів і екологічної економіки.Болонский процесс приводит лесное хозяйство и лесное образование в контекст развития глобальной экономики, а также всемирной заботы о защите окружающей среды и изменениях климата. Это стимулирует интеграцию лесного хозяйства в систему неистощимого землепользования и сочетание опыта лесного хозяйства, новых научных знаний и методологии исследований. Лесным профессионалам нужны всесторонние общеобразовательные знания, если они должны удержаться на фоне быстро меняющихся социальных, экономических и политических проблем. В то же время им нужно понять локальные и культурные аспекты развивающегося лесного хозяйства. Это требует объединенного подхода к управлению лесами, защите окружающей среды и сохранению ландшафтов. Для поддержания основы природных ресурсов и лесов, в которых ведется хозяйство, в неистощимой форме требуется программа преподавания, которая объединяет политику, закон, деловую экономику и управление, составные части лесных ресурсов и экологической экономики

Normal origamis of Mumford curves

An origami (also known as square-tiled surface) is a Riemann surface covering a torus with at most one branch point. Lifting two generators of the fundamental group of the punctured torus decomposes the surface into finitely many unit squares. By varying the complex structure of the torus one obtains easily accessible examples of Teichm\"uller curves in the moduli space of Riemann surfaces. The p-adic analogues of Riemann surfaces are Mumford curves. A p-adic origami is defined as a covering of Mumford curves with at most one branch point, where the bottom curve has genus one. A classification of all normal non-trivial p-adic origamis is presented and used to calculate some invariants. These can be used to describe p-adic origamis in terms of glueing squares.Comment: 21 pages, to appear in manuscripta mathematica (Springer

A series of coverings of the regular n-gon

We define an infinite series of translation coverings of Veech's double-n-gon for odd n greater or equal to 5 which share the same Veech group. Additionally we give an infinite series of translation coverings with constant Veech group of a regular n-gon for even n greater or equal to 8. These families give rise to explicit examples of infinite translation surfaces with lattice Veech group.Comment: A missing case in step 1 in the proof of Thm. 1 b was added. (To appear in Geometriae Dedicata.

Square-tiled cyclic covers

A cyclic cover of the complex projective line branched at four appropriate points has a natural structure of a square-tiled surface. We describe the combinatorics of such a square-tiled surface, the geometry of the corresponding Teichm\"uller curve, and compute the Lyapunov exponents of the determinant bundle over the Teichm\"uller curve with respect to the geodesic flow. This paper includes a new example (announced by G. Forni and C. Matheus in \cite{Forni:Matheus}) of a Teichm\"uller curve of a square-tiled cyclic cover in a stratum of Abelian differentials in genus four with a maximally degenerate Kontsevich--Zorich spectrum (the only known example found previously by Forni in genus three also corresponds to a square-tiled cyclic cover \cite{ForniSurvey}). We present several new examples of Teichm\"uller curves in strata of holomorphic and meromorphic quadratic differentials with maximally degenerate Kontsevich--Zorich spectrum. Presumably, these examples cover all possible Teichm\"uller curves with maximally degenerate spectrum. We prove that this is indeed the case within the class of square-tiled cyclic covers.Comment: 34 pages, 6 figures. Final version incorporating referees comments. In particular, a gap in the previous version was corrected. This file uses the journal's class file (jmd.cls), so that it is very similar to published versio

Formation of a stable deacagonal quasicrystalline Al-Pd-Mn surface layer

We report the in situ formation of an ordered equilibrium decagonal Al-Pd-Mn quasicrystal overlayer on the 5-fold symmetric surface of an icosahedral Al-Pd-Mn monograin. The decagonal structure of the epilayer is evidenced by x-ray photoelectron diffraction, low-energy electron diffraction and electron backscatter diffraction. This overlayer is also characterized by a reduced density of states near the Fermi edge as expected for quasicrystals. This is the first time that a millimeter-size surface of the stable decagonal Al-Pd-Mn is obtained, studied and compared to its icosahedral counterpart.Comment: Submitted to Phys. Ref. Lett. (18 July 2001

Characterization And Properties Of The AIPdMn 5 Surface

The surface of the AlPdMn quasicrystal perpendicular to a fivefold axis has been probed by LEED, XPS, Auger spectroscopy and surface EXAFS.This article is from MRS Proceedings 553 (1998): 243–250, doi:10.1557/PROC-553-243.</p