Search results for "Peat"

Increasing Sustainability of Growing Media Constituents and Stand-Alone Substrates in Soilless Culture Systems

2020

Peat-free growing media constituents and stand-alone substrates are the basis for the economic and ecological efficiency of the soilless culture system. Nevertheless, divergence between the model and practice still exists, coming from large gaps in the knowledge of alternative organic materials and of their effects on crop performance. A more detailed understanding of these topics is necessary to increase the soilless culture management capacity. In this respect, this critical review collects research outcomes concerning the sustainability of soilless culture and growing media constituents and their impact on the environment. In particular, the review covers designated articles stressing th…

Partnership formation and dissolution over the life course: applying sequence analysis and event history analysis in the study of recurrent events

2015

We present two types of approach to the analysis of recurrent events for discretely measured data, and show how these methods can complement each other when analysing co-residential partnership histories. Sequence analysis is a descriptive tool that gives an overall picture of the data and helps to find typical and atypical patterns in histories. Event history analysis is used to make conclusions about the effects of covariates on the timing and duration of the partnerships. As a substantive question, we studied how family background and childhood socio-emotional characteristics were related to later partnership formation and stability in a Finnish cohort born in 1959. We found that high se…

Kūdras sastāva ietekme uz elementu akumulāciju zemajos purvos

2016

Elektroniskā versija nesatur pielikumus

Effect of Sex, Body Mass Index and Physical Activity Level on Peak Oxygen Uptake Among 14–19 Years Old Adolescents

2020

The aim was to describe longitudinal trends in peak oxygen uptake (VO2peak) among 14- to 19-year-old adolescents in Norway, and to examine effects of sex, body mass index (BMI), and physical activity (PA) level on VO2peak during adolescence. Of 124 invited students from two lower secondary schools in Norway, 116 eighth-grade students (61 boys and 55 girls; 14 years old at baseline) volunteered to participate. The study has a longitudinal design with 6 yearly repeated measures of body height and mass, VO2peak and PA level. VO2peak allometrically scaled to body mass raised to the power of 0.67 was measured using a walking or running incremental test on a treadmill, whereas PA level was self-r…

Effect of fertilization on growth of lingonberry (Vaccinium vitis-idaea L.)

2021

Received: January 29th, 2021 ; Accepted: April 10th, 2021 ; Published: April 20th, 2021 ; Correspondence: andis.karlsons@lu.lv Today, most of the global berry crop of Vaccinium vitis-idaea L. is obtained from wild berries. In recent years, however, their cultivation has become slightly more widespread, especially as demand has increased. As the commercial production of lingonberries is a completely new fruit-growing sector in Latvia, research on mineral nutrition, development of the crop production system and proper fertilizer management is critically important. The objective of this study was to elucidate the effect of different fertilizer rates on the nutrient status of lingonberry plant …

Power calculation of multi-band signals: design and implementation on FPGA

2017

International audience

Lifestyle and Empowerment Techniques in Survivorship of Gynaecologic Oncology (LETSGO study): A study protocol for a multicentre longitudinal interve…

2021

IntroductionThe number of gynaecological cancer survivors is increasing and there is a need for a more sustainable model of follow-up care. Today’s follow-up model is time-consuming and patients have reported unmet needs regarding information about their cancer and strategies for managing the consequences of treatment. The main aim of this study is to assess health-related empowerment—in terms of patient education, psychosocial support, and promotion of physical activity—in a new follow-up model by comparing it to standard follow-up in a quasi-randomised study involving intervention hospitals and control hospitals.Methods and analysisAt the intervention hospitals, patients will be stratifie…

Suora fotonituotto suurienergiaisissa ydintörmäyksissä sähkömagneettisen ja vahvan vuorovaikutuksen kertaluvussa O(α _em α_S)

2013

Ympäristönsuojelulaki vuotaa: turvekiista tunnustuskamppailuna

2023

Tutkimme Keski-Suomessa pitkään jatkunutta turvekiistaa selvittämällä kyselyllä ja haastatteluilla kansalaisten käsityksiä turvetuotannosta ja sen vesistövaikutuksista. Tutkimuksemme osoittaa, että poliittis-hallinnollinen järjestelmä ei ole kyennyt täyttämään ympäristönsuojelulain tavoitetta turvata kansalaisille terveellinen ja viihtyisä ympäristö ja parantaa kansalaisten mahdollisuuksia vaikuttaa ympäristöä koskevaan päätöksentekoon. Lailla ei ole edellytyksiä säännellä kaikkia niitä luontoa hyödyntäviä toimintoja, joiden kansalaiset kokevat saastuttavan vesiympäristöään. Tämä puute näkyy esimerkiksi turpeennoston kaltaisissa toiminnoissa, jotka aiheuttavat vesistöjen hajakuormitusta eri…

Analysis of MAC-level throughput in LTE systems with link rate adaptation and HARQ protocols

2015

LTE is rapidly gaining momentum for building future 4G cellular systems, and real operational networks are under deployment worldwide. To achieve high throughput performance, in addition to an advanced physical layer design LTE exploits a combination of sophisticated mechanisms at the radio resource management layer. Clearly, this makes difficult to develop analytical tools to accurately assess and optimise the user perceived throughput under realistic channel assumptions. Thus, most existing studies focus only on link-layer throughput or consider individual mechanisms in isolation. The main contribution of this paper is a unified modelling framework of the MAC-level downlink throughput of …