scholarly journals Stem Characteristics on the Lower Log of 35-Year-Old Western Redcedar Grown at Several Spacings

1997 ◽  
Vol 12 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Jeffrey D. DeBell ◽  
Barbara L. Gartner
Keyword(s):  
Large Diameter ◽  
Stem Diameter ◽  
Stem Length ◽  
Thuja Plicata ◽  
Western Redcedar ◽  
Branch Diameter ◽  
University Of British Columbia ◽  
The University ◽  
Number Of Branches

Abstract Information on stem characteristics of western redcedar (Thuja plicata) grown in managed stands is quite limited. Stem characteristics are important because they influence the quality of logs and lumber produced. We measured branch diameter, number of branches, taper, and fluting severity on the first 5m log of stems grown at spacings of 1.8 to 4.6 m in a 35-yr-old spacing trial on the University of British Columbia Research Forest. Average branch diameter increased from 15 mm to 25 mm as tree spacing increased from 1.8 m to 4.6 m. Number of branches per unit of stem length was unaffected by spacing. Trees at wider spacings tended to be more tapered and have more butt swell than those at narrower spacings. At wider spacings, more trees showed fluting, and that fluting was more severe than at narrower spacings. However, most trees had no fluting or only mild fluting even at the 4.6 m spacing. Branch diameter, taper, and fluting were all related to stem diameter. Smaller diameter stems tended to have smaller branches, less taper, and were less likely to have severe fluting than large diameter stems. Branch diameter was larger at wider spacings even for trees of the same stem diameter. West. J. Appl. For. 12(1):9-14.

Acoustical Improvements with Natural Air Ventilation in the Liu Institute for Global Issues at the University of British Columbia

2011 ◽  
Vol 6 (1) ◽  
pp. 114-122
Author(s):  
Zohreh Razavi ◽  
Max Richter ◽  
Murray Hodgson ◽  
Alireza Khaleghi
Keyword(s):  
Natural Ventilation ◽  
Ventilation System ◽  
Green Building ◽  
Optimized Design ◽  
Global Issues ◽  
University Of British Columbia ◽  
Air Ventilation ◽  
The University ◽  
Building Designs

Low speech privacy in shared and private offices in one of the early generation of a “green” building resulted in occupants' dissatisfaction. This problem is experienced in Liu institute with a natural-ventilation system. Such a system requires low air-flow resistance which is achieved by large openings which will result in noise transmission between various spaces within the building. The poor acoustical quality in this building resulted in occupants' noise complaints which were further investigated by way of relevant acoustical measurements. CATT-Acoustic software was utilized to modify the acoustical quality of the building without any disturbance to the occupants. The optimized design of the transfer box above the office door was selected based on CATT-Acoustic predictions. The acoustical measurements were conducted after installation of the transfer box above the office door. The measurements' results agreed with the predictions which led to improved speech privacy to an acceptable level between the office and the corridor in Liu Institute. More work should be done to improve the acoustical quality of natural-ventilated building to conform to ANSI standards.1The results of this study strongly support including acoustics in “green” building designs with natural ventilation to avoid users' complaints.

Heritability and genetic correlations for stem diameter and branch characteristics in white spruce

1985 ◽  
Vol 15 (3) ◽  
pp. 494-497 ◽  
Author(s):  
R. E. Merrill ◽  
C. A. Mohn
Keyword(s):  
Rapid Growth ◽  
Genetic Correlations ◽  
Negative Relationship ◽  
Selection Procedure ◽  
Height Growth ◽  
Stem Diameter ◽  
Branch Diameter ◽  
Branch Angle ◽  
Selection For ◽  
Number Of Branches

Heritabilities were calculated for several traits in a selected population of 20-year-old Piceaglauca (Moench) Voss. The population had been modified by selection for rapid height growth at ages 12 and 18 years. Heritability estimates were moderate for branch angle and low for stem diameter, branch diameter, and number of branches per whorl. The genetic correlations among the traits indicated a negative relationship between rapid growth and desirable branch characters, although the correlations were generally small. The use of a two-stage selection procedure, selecting initially for rapid growth and subsequently for desirable branching traits, appears feasible in this population.

scholarly journals Pengaruh Panjang dan Diameter Stek Batang Terhadap Pertumbuhan Bibit Kelor (Moringa oleifera Lam.)

2018 ◽  
Vol 4 (2) ◽  
pp. 120
Author(s):  
Wahyu Astiko ◽  
Ahsani Taqwim ◽  
Bambang Budi Santoso
Keyword(s):  
Moringa Oleifera ◽  
Stem Diameter ◽  
Stem Cutting ◽  
Stem Length ◽  
Stem Cuttings ◽  
Randomized Design ◽  
Cutting Length ◽  
Nursery Field ◽  
Moringa Oleifera Lam

The purpose of the study is to discover the best length and the diameter of Moringa oleifera Lam. stem cuttings to produce high quality of seedlings. The study was conducted during March-May 2017 located in the nursery field at Dasan Agung, Mataram, 16 m asl. This study was experimental research with Complete Randomized Design with three three replications, and each contains 5 serial experiment units. The treatment for stem cutting length (25 cm, 50 cm, and 75 cm) was then combined with different stem cutting diameters (3-4 cm, 4.1-5 cm, and 5.1-6 cm). The result shows that combination of 75 cm stem length with stem  diameter of 5.1-6 cm resulted to have the best seedling growth.The longer the cutting (up to 75 cm), the better the growth of the seedling. The thickest stem diameter (5.1-6 cm) resulted better seedling

scholarly journals Cycle duration and quality of gladiolus floral stems in three locations of Southern Brazil

2018 ◽  
Vol 24 (4) ◽  
pp. 317-326
Author(s):  
Regina Tomiozzo ◽  
Gizelli Moiano De Paula ◽  
Nereu Augusto Streck ◽  
Lilian Osmari Uhlmann ◽  
Camila Coelho Becker ◽  
...  
Keyword(s):  
Field Experiments ◽  
Growth Cycle ◽  
Stem Diameter ◽  
Spike Length ◽  
Stem Length ◽  
Cycle Duration ◽  
Southern Brazil ◽  
Planting Dates ◽  
Commercial Cultivation

The objective of this study was to determine the cycle duration in days and the quantitative parameters, i.e. stem length, spike length and stem diameter of gladiolus floral stems as a function of the planting date and locations in the Rio Grande do Sul/Brazil. Field experiments were established between 2014-2015 in three locations (Frederico Westphalen, Itaqui and Santa Maria). The experimental design was a complete randomized block, with six gladiolus cultivars in three distinct planting dates at each location as treatments. The shift from vegetative to reproductive stage, the stem length, spike length and stem diameter were evaluated. Data was statistically analyzed by ANOVA and Tukey test. When planted during late July and early August, cultivars of early cycle(‘Purple Flora’, ‘Rose Friendship’ and ‘White Friendship’) and intermediate cycle (‘Green Star’ and ‘Jester’), produced floral stems of gladiolus in the desired patterns besides as well as having a shorter growth cycle than late cultivars (‘Gold Field’), being recommended for commercial cultivation in Southern Brazil.

scholarly journals Production and Quality of Physalis ixocarpa Brot. Fruit under Colored Shade Netting

HortScience ◽  
2018 ◽  
Vol 53 (6) ◽  
pp. 823-828
Author(s):  
Isidro Morales ◽  
Gabino Alberto Martínez-Gutiérrez ◽  
Cirenio Escamirosa-Tinoco ◽  
Cinthia Nájera ◽  
Tatiana Pagan Loeiro da Cunha-Chiamolera ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Stem Diameter ◽  
Soluble Solids ◽  
Control Group ◽  
Total Soluble Solids ◽  
Light Spectra ◽  
Growth Production ◽  
Weight Number ◽  
Number Of Branches

The use of colored shade nets is a method to protect plants from direct solar radiation and optimize the light spectra they transmit. The purpose of this work was to evaluate the photosynthetically active radiation (PAR), the photosynthetically active integrated radiation (IPAR), temperature, relative humidity, growth, production, and fruit quality of Physalis ixocarpa variety Tecozautla, cultivated under nets generating 60% shade in the colors beige, blue, green, red, and black and under a treatment without netting (control group). Different variables were observed: climatic variables, such as radiation, temperature, and relative humidity; growth variables, such as plant height and stem diameter; production variables, such as number, weight, and caliber of the fruit; and quality variables of the fruit, such as pH and total soluble solids. The highest PAR, IPAR, and temperature and lowest relative humidity were obtained in the absence of netting. The white net resulted in the highest PAR and IPAR but no difference in temperature or relative humidity. In addition, an increase in the height, stem diameter, number of branches, and weight, number, and size of the fruit was observed. The white net resulted in the highest yield: 88% higher than in the control group. The pH of the fruit was significantly higher under the white netting, and no differences among the treatments in terms of the content of total soluble solids were found.

scholarly journals How Student Reflections Have Guided the Evolution of a Mechanical Engineering Capstone Design Course

2013 ◽  
Author(s):  
H.F. Machiel Van der Loos ◽  
Antony Hodgson ◽  
Jon Mikkelsen ◽  
Markus Fengler
Keyword(s):  
Professional Growth ◽  
Teaching Evaluations ◽  
The Past ◽  
University Of British Columbia ◽  
Teaching Team ◽  
The University ◽  
Student Reflections ◽  
Insight Into ◽  
Capstone Design

To provide for professional growth of students and to gain deeper insight into student engagement in the University of British Columbia MECH Capstone Design Project Course, the teaching team has deployed an open-ended reflection opportunity over the past 6 years as an adjunct to the required teaching evaluations. Three years of year-end questionnaires and three years of bi-monthly instructor-led reflection sessions form the datasets. Although the two formats are fundamentally different, the quality of the responses provides evidence of high student awareness of their own learning process and a desire to be a meaningful contributor in the conversation on course improvement.

Epistemic and relational conflicts in sharing identical vs. complementary information during cooperative learning

2002 ◽  
Vol 61 (3) ◽  
pp. 139-151 ◽  
Author(s):  
Céline Darnon ◽  
Céline Buchs ◽  
Fabrizio Butera
Keyword(s):  
Cooperative Learning ◽  
Social Comparison ◽  
Positive Relationship ◽  
Learning Task ◽  
Control Group ◽  
Complementary Information ◽  
Relational Conflict ◽  
The Social ◽  
The University

When interacting on a learning task, which is typical of several academic situations, individuals may experience two different motives: Understanding the problem, or showing their competences. When a conflict (confrontation of divergent propositions) emerges from this interaction, it can be solved either in an epistemic way (focused on the task) or in a relational way (focused on the social comparison of competences). The latter is believed to be detrimental for learning. Moreover, research on cooperative learning shows that when they share identical information, partners are led to compare to each other, and are less encouraged to cooperate than when they share complementary information. An epistemic vs. relational conflict vs. no conflict was provoked in dyads composed by a participant and a confederate, working either on identical or on complementary information (N = 122). Results showed that, if relational and epistemic conflicts both entailed more perceived interactions and divergence than the control group, only relational conflict entailed more perceived comparison activities and a less positive relationship than the control group. Epistemic conflict resulted in a more positive perceived relationship than the control group. As far as performance is concerned, relational conflict led to a worse learning than epistemic conflict, and - after a delay - than the control group. An interaction between the two variables on delayed performance showed that epistemic and relational conflicts were different only when working with complementary information. This study shows the importance of the quality of relationship when sharing information during cooperative learning, a crucial factor to be taken into account when planning educational settings at the university.

Evaluation of the Academic Setting in Spain 1This study was financed by the University of Oviedo.

1995 ◽  
Vol 11 (2) ◽  
pp. 133-137 ◽  
Author(s):  
Juan Fernández ◽  
Miguel A. Mateo ◽  
José Muñiz
Keyword(s):  
Higher Education ◽  
Decision Making ◽  
Social Climate ◽  
Three Dimensions ◽  
Academic Setting ◽  
Teaching And Research ◽  
Evaluation Questionnaire ◽  
University Teachers ◽  
The University

The conditions are investigated in which Spanish university teachers carry out their teaching and research functions. 655 teachers from the University of Oviedo took part in this study by completing the Academic Setting Evaluation Questionnaire (ASEQ). Of the three dimensions assessed in the ASEQ, Satisfaction received the lowest ratings, Social Climate was rated higher, and Relations with students was rated the highest. These results are similar to those found in two studies carried out in the academic years 1986/87 and 1989/90. Their relevance for higher education is twofold because these data can be used as a complement of those obtained by means of students' opinions, and the crossing of both types of data can facilitate decision making in order to improve the quality of the work (teaching and research) of the university institutions.

Development of the University of Toronto Skull Base Inventory (UT-SBI) Quality-of-Life Questionnaire

Skull Base ◽  
2009 ◽  
Vol 19 (03) ◽  
Author(s):  
John de Almeida ◽  
Allan Vescan ◽  
Jolie Ringash ◽  
Patrick Gullane ◽  
Fred Gentili ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Skull Base ◽  
Life Questionnaire ◽  
Quality Of Life Questionnaire ◽  
University Of Toronto ◽  
The University

A Futures Study on the Quality Of Life from the Point Of View of Iranian Youth

2017 ◽  
Vol 14 (2) ◽  
pp. 1
Author(s):  
Sina Saeedy ◽  
Mojtaba Amiri ◽  
Mohammad Mahdi Zolfagharzadeh ◽  
Mohammad Rahim Eyvazi
Keyword(s):  
Quality Of Life ◽  
Life Satisfaction ◽  
Mixed Model ◽  
Satisfaction With Life ◽  
Point Of View ◽  
Human Society ◽  
Futures Studies ◽  
The Social ◽  
The University

Quality of life and satisfaction with life as tightly interconnected concepts have become of much importance in the urbanism era. No doubt, it is one of the most important goals of every human society to enhance a citizen’s quality of life and to increase their satisfaction with life. However, there are many signs which demonstrate the low level of life satisfaction of Iranian citizens especially among the youth. Thus, considering the temporal concept of life satisfaction, this research aims to make a futures study in this field. Therefore, using a mixed model and employing research methods from futures studies, life satisfaction among the students of the University of Tehran were measured and their views on this subject investigated. Both quantitative and qualitative data were analysed together in order to test the hypotheses and to address the research questions on the youth discontentment with quality of life. Findings showed that the level of life satisfaction among students is relatively low and their image of the future is not positive and not optimistic. These views were elicited and discussed in the social, economic, political, environmental and technological perspectives. Keywords:  futures studies, quality of life, satisfaction with life, youth

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