A Design Methodology for MPEG-21 based Digital Policy Management Systems

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Girassol Clearfield consorciado com Brachiaria ruziziensis utilizando herbicidas inibidores da enzima aceto-lactato sintase (ALS).

O objetivo desse experimento foi avaliar a tolerância do girassol (Helianthus annuus) e a supressão do capim-braquiária (Brachiaria ruziziensis) a herbicidas inibidores da enzima aceto-lactato sintase (ALS). O delineamento experimental foi blocos casualizados, com quatro repetições. Os tratamentos foram i) imazethapyr 30 g i.a./ha; ii) imazethapyr 70 g i.a./ha; iii) imazapyr 75 g e.a./ha; iv) imazapyr 125 g e.a./ha; v) chlorimuron-ethyl 7,5 g i.a./ha; vi) chlorimuron-ethyl 12,5 g i.a./ha; vii) nicosulfuron 8 g i.a./ha; viii) nicosulfuron 20 g i.a./ha; ix) testemunha sem capina e x) testemunha capinada. Os tratamentos com imazethapyr (30 e 70 g i.a./ha), imazapyr (75 e 125 g e.a./ha) e nicosulfuron (8 e 20 g i.a./ha) não causaram injúrias às plantas de girassol. O chlorimuron-ethyl nas doses de 7,5 e 12,5 g i.a./ha resultou em alto grau de fitointoxicação às plantas de girassol. O imazethapyr (30 e 70 g i.a./ha) e o nicosulfuron (8 g i.a./ha) causaram supressão do crescimento das plantas de B. ruziziensis. Entretanto, o imazapyr (75 e 125 g e.a./ha) e a maior dose de nicosulfuron (20 g i.a./ha) afetaram drasticamente a produção de fitomassa da forrageira, com morte das plantas

Tolerância diferencial de genótipos Clearfield e convencional aos herbicidas inibidores da enzima ALS.

O objetivo do presente trabalho foi comparar a sensibilidade de dois genótipos de girassol, um resistente (Paraiso 102 CL- Clearfield) e outro suscetível (Embrapa 122 V2000) aos herbicidas inibidores da enzima acetolactato sintase (ALS). O delineamento experimental foi blocos ao acaso, em parcelas subdivididas, com quatro repetições. Nas parcelas, foram avaliados dois cultivares de girassol, um resistente (Paraiso 102 CL) e outro suscetível (Embrapa 122 V2000) aos herbicidas inibidores da enzima acetolactato sintase. Nas subparcelas, foram aplicados sete tratamentos (i) testemunha capinada, (ii) testemunha sem capina, (iii) imazethapyr 100 g i.a./ha, (iv) imazapyr 250 g i.a./ha, (v) imazapyr 25 g i.a./ha, (vi) nicosulfuron 60 g i.a./ha e (vii) nicosulfuron 4 g i.a./ha. O imazethapyr 100 g i.a./ha, o imazapyr 25 g i.a./ha e o nicosulfuron 4 g i.a./ha proporcionaram valores baixos de fitotoxicidade ao girassol Paraíso 102 CL. Todos os tratamentos herbicidas e respectivas doses causaram alto grau de fitotoxicidade às plantas de girassol Embrapa 122 V2000

Consórcio de girassol e Brachiaria ruziziensis utilizando subdoses de herbicidas graminicidas.

O objetivo desse trabalho foi avaliar a supressão do capim-braquiária (Brachiaria ruziziensis) em consórcio com o girassol (Helianthus annuus) e submetida a doses reduzidas de herbicidas inibidores da acetil coenzima A carboxilase (ACCase). O delineamento experimental foi em blocos casualizados, com três repetições. Os tratamentos foram i) testemunha capinada; ii) testemunha sem capina; iii) tepraloxydim 10 g i.a./ha; iv) tepraloxydim 20 g i.a./ha; v) tepraloxydim 40 g i.a./ha; vi) fluazifop-p-butyl 12,5 g i.a./ha; vii) fluazifop-p-butyl 25,0 g i.a./ha; viii) fluazifop-p-butyl 50,0 g i.a./ha. É viável a utilização de doses reduzidas de graminicidas como reguladores de crescimento da B. ruzizizensis. Todos os herbicidas e doses aplicadas foram seletivos para a cultura do girassol. O herbicida tepraloxydim na menor dose (10 g i.a./ha) reduziu o crescimento da forrageira e as duas maiores doses 20 e 40 g i.a./ha causaram alto grau de fitotoxicidade às plantas de B. ruzizizensis e redução total da produção de forragem. As doses do fluazifop-p-butyl suprimiram o crescimento do capim-braquiária, havendo redução de produção de forragem com o aumento das doses desse herbicida

Girassol Clearfield consorciado com Brachiaria ruziziensis utilizando doses reduzidas de herbicidas inibidores de ACCase.

O objetivo desse trabalho foi avaliar a tolerância do girassol (Helianthus annuus) e o estabelecimento do capim-braquiária (Brachiaria ruziziensis) submetidos a doses reduzidas de herbicidas em sistemas de integração lavoura-pecuária. O delineamento experimental foi blocos casualizados, com quatro repetições. Os tratamentos foram i) tepraloxydim 10 g i.a./ha; ii) tepraloxydim 20 g i.a./ha; iii) fluazifop-p-butyl 12,5 g i.a./ha; iv) fluazifop-p-butyl 25,0 g i.a./ha; v) clethodim 12,0 g i.a./ha; vi) clethodim 24,0 g i.a./ha; vii) haloxyfop-methyl 6,0 g i.a./ha; viii) haloxyfop-methyl 12,0 g i.a./ha; ix) testemunha sem capina e x) testemunha capinada. É viável a utilização de doses reduzidas de graminicidas como reguladores de crescimento da B. ruzizizensis, reduzindo sua capacidade competitiva com a cultura do girassol. Todas as doses aplicadas causaram supressão do crescimento da B. ruzizizensis, a exceção da maior dose de clethodim e da maior dose de haloxyfop methyl, havendo morte total das plantas da forrageira. No tratamento onde foi aplicada a dose de 12,5 g i.a./ha de fluazifop-p-butyl houve a maior produtividade de fitomassa da forrageira. Todos os tratamentos herbicidas foram seletivos para a cultura do girassol

Introduction to the proceedings of the Piccola Impresa/Small Business 5th Workshop: “Beyond the crisis: what is the future for small businesses? Challenges, opportunities and lessons learned”

In this volume, we are pleased to present the proceedings of the 5th Workshop organised by the journal Piccola Impresa/Small Business in collaboration with the Association for the study of small enterprises (ASPI), the Research Center on Entrepreneurship and Small-medium firms (CRIMPI), the Italian Academy of Business Economics (AIDEA) and the European Council for Small Business and Entrepreneurship (ECSB). The workshop title was “Beyond the crisis: what is the future for small businesses? Challenges, opportunities and lessons learned”, and it took place online on December 4-5, 2021. The aim of the conference was to bring together scholars of entrepreneurship and small and medium-sized enterprises, to discuss the emerging issues following the Covid-19 pandemic. As we have highlighted in the call for papers of the workshop and a previous editorial published in the journal mentioned above (Pencarelli et al. 2021), the COVID-19 pandemic has triggered the largest public health crisis in living memory, with serious—and still unpredictable—consequences for the global economy. Available data clearly shows that SMEs have particularly suffered from economic downturn: their inherent weaknesses have amplified and accelerated the effects of the crisis compared to larger firms (Cowling et al., 2020; OECD, 2020). Notably, in Italy, the Covid-19 outbreak has challenged SMEs’ survival after a decade of a slow and incomplete recovery (CERVED, 2020, 2021)

Exploring entity-centric methods in the UK Government Web Archive

Being able to explore large digital collections effectively is of interest to both academics and practitioners alike. The need to go beyond the provision of keyword-driven functionality to features that support exploration and discovery is widely recognised. In addition, providers are seeking to support more diverse groups of users with varying information needs and tasks. Increasing amounts of cultural heritage are being stored in web archives that present unique challenges as a form of digital cultural heritage. This paper describes a collaboration between the University of Sheffield and the UK National Archives to investigate entity-based methods for exploring the UK Government Web Archive

Demonstration of Feed-Forward Control for Linear Optics Quantum Computation

One of the main requirements in linear optics quantum computing is the ability to perform single-qubit operations that are controlled by classical information fed forward from the output of single photon detectors. These operations correspond to pre-determined combinations of phase corrections and bit-flips that are applied to the post-selected output modes of non-deterministic quantum logic devices. Corrections of this kind are required in order to obtain the correct logical output for certain detection events, and their use can increase the overall success probability of the devices. In this paper, we report on the experimental demonstration of the use of this type of feed-forward system to increase the probability of success of a simple non-deterministic quantum logic operation from approximately 1/4 to 1/2. This logic operation involves the use of one target qubit and one ancilla qubit which, in this experiment, are derived from a parametric down-conversion photon pair. Classical information describing the detection of the ancilla photon is fed-forward in real-time and used to alter the quantum state of the output photon. A fiber optic delay line is used to store the output photon until a polarization-dependent phase shift can be applied using a high speed Pockels cell

Stimulated emission of polarization-entangled photons

Entangled photon pairs -- discrete light quanta that exhibit non-classical correlations -- play a crucial role in quantum information science (for example in demonstrations of quantum non-locality and quantum cryptography). At the macroscopic optical field level non-classical correlations can also be important, as in the case of squeezed light, entangled light beams and teleportation of continuous quantum variables. Here we use stimulated parametric down-conversion to study entangled states of light that bridge the gap between discrete and macroscopic optical quantum correlations. We demonstrate experimentally the onset of laser-like action for entangled photons. This entanglement structure holds great promise in quantum information science where there is a strong demand for entangled states of increasing complexity.Comment: 5 pages, 4 figures, RevTeX