منابع مشابه
The Complexity Landscape of Fixed-Parameter Directed Steiner Network Problems∗
Given a directed graph G and a list (s1, t1), . . . , (sk, tk) of terminal pairs, the Directed Steiner Network problem asks for a minimum-cost subgraph of G that contains a directed si → ti path for every 1 ≤ i ≤ k. The special case Directed Steiner Tree (when we ask for paths from a root r to terminals t1, . . . , tk) is known to be fixed-parameter tractable parameterized by the number of term...
متن کاملDeveloping approaches for linear mixed modeling in landscape genetics through landscape‐directed dispersal simulations
Dispersal can impact population dynamics and geographic variation, and thus, genetic approaches that can establish which landscape factors influence population connectivity have ecological and evolutionary importance. Mixed models that account for the error structure of pairwise datasets are increasingly used to compare models relating genetic differentiation to pairwise measures of landscape r...
متن کاملthe effects of cooperative versus individual directed reading thinking activities on students inferential and referential questions
two groups of students were assigned as experimental and control ones, and were given instruction on directed reading-thinking activities and after some treatment, they were post-tested. although the initial pre-test did not show any significant differences, the final post-test result revealed that the cooperative reading comprehension helped the experimental group. the cooperative students’...
15 صفحه اولWhich is effective: self-directed learning or tutor-directed learning on the level of nursing skills
Introduction. This is quasi experimental research in order to determine and compare the learning level of nursing skills ( in B.A students) with self-directed learning and tutor-directed learning pattern in Shaheed Beheshti Univeristy of Medical Sciences and Health Services, Nursing and Midwifery faculty, 1998-1999. Methods. First of all, a questionnaire composed of some demographic data such ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Acta Mathematica
سال: 2022
ISSN: ['0001-5962', '1871-2509']
DOI: https://doi.org/10.4310/acta.2022.v229.n2.a1