Zeitschrift Für Physik A Hadrons And Nuclei, Feb 1, 1969
ABSTRACT Dynamical relations between masses and coupling constants have been studied using the su... more ABSTRACT Dynamical relations between masses and coupling constants have been studied using the superconvergent sum rule technique in vector meson — vector meson scattering. Unessential complications due to the spin have been removed by defining a set of 25 KSF invariant amplitudes. Commonly accepted analyticity properties and asymptotics estimated arguing along the line of unitarity then lead to superconvergent sum rules for three amplitudes. Their saturation by one-intermediate-particle contributions in the processes , BB andA 1A 1 results in a system of nine coupled equations which have been approximately solved for coupling constants and a--B- A 1 mass sum rule.
ABSTRACT Dynamical relations between masses and coupling constants have been studied using the su... more ABSTRACT Dynamical relations between masses and coupling constants have been studied using the superconvergent sum rule technique in vector meson — vector meson scattering. Unessential complications due to the spin have been removed by defining a set of 25 KSF invariant amplitudes. Commonly accepted analyticity properties and asymptotics estimated arguing along the line of unitarity then lead to superconvergent sum rules for three amplitudes. Their saturation by one-intermediate-particle contributions in the processes , BB andA 1A 1 results in a system of nine coupled equations which have been approximately solved for coupling constants and a--B- A 1 mass sum rule.
This volume contains the lectures covering the main lines of developments in the presently most a... more This volume contains the lectures covering the main lines of developments in the presently most active field of particle physics: string field theory, anomalies, unification and physics beyond the Planck length. The lectures are generally pedagogical in style, designed at the postdoctoral level, but at the same time they introduce one to the most recent results in the field.
Heat demand may decrease in the future due to changing weather conditions and building renovation... more Heat demand may decrease in the future due to changing weather conditions and building renovation policies, possibly impacting the efficiency and profitability of renewable heat production and distribution systems which are commonly proposed in the literature as an adequate measure for building sector emissions mitigation. In this work, the potential evolution of building heat demand in characteristic locations (within heating dominant climates) is assessed for different scenarios by using a sample building as a case study. Three future weather scenarios were created based on a previously developed methodology, along with one building renovation scenario based on market penetration rates of different renovation measures. Heat demand was calculated through a heat demand model previously developed and validated by the authors. To represent the results, heat demand-outdoor temperature function parameters were used. The results indicated that the impact of changed weather conditions was significantly lower than the impact of building renovation. Overall, the difference in the parameters rate of decrease/increase was lower than 2% between weather scenarios for the same year considered. After the initial building renovation in 2020, the slope coefficient of the outdoor temperature-heat demand function increased between 45% and 51%, while the intercept decreased within the range A c c e p t e d M a n u s c r i p t 2 of 48% and 51 % (depending on the weather scenario and location considered). The reduction in the number of heating hours was almost negligible in the colder climates considered, while in the warmer climates the decrease rate was significant-0.8% and 43% of heating hours respectively in 2050 compared to 2010, for the medium weather scenario. Such decrease in demand and heating hours could significantly impact the operational parameters of heat production and distribution units, as well as their feasibility.
We consider a large-N Chern-Simons theory for the attractive bosonic matter (Jackiw-Pi model) in ... more We consider a large-N Chern-Simons theory for the attractive bosonic matter (Jackiw-Pi model) in the Hamiltonian collective-field approach based on the 1/N expansion. We show that the dynamics of low-lying density fluctuations around the semiclassical wall solution is governed by the Calogero Hamiltonian . The relationship between the Chern-Simons coupling constant k and the statistical parameter l signalizes some sort of statistical transmutation accompanying the dimensional reduction of the initial problem.
Narrow-leaved ash (Fraxinus angustifolia Vahl) is a fast growing and light demanding forest tree ... more Narrow-leaved ash (Fraxinus angustifolia Vahl) is a fast growing and light demanding forest tree species. In Croatia, the largest complexes of this species can be found along the Sava River. The main objective of research was to determine the influence of environmental drivers on budburst dates. Research was carried out in the clonal seed orchard of Nova Gradiška through four vegetation seasons (2012, 2014, 2015 and 2016). In total, 42 clones were involved in this study. The target phase of phenology monitoring was the phase with distinct budburst and partial segregation of bud scales. Three environmental drivers were selected (temperature, precipitation and insolation) with three different summing dates (1 st November, 1 st December and 1 st January). Statistical data processing included the following analyses: Spearman Rank Correlation, Linear Regression, Multiple Regression and Stepwise Multiple Regression. Among three tested environmental drivers in all of the analyses performed in the study, insolation proved to be the most important factor in the description of budburst dates in narrow-leaved ash.
We consider a large-N anyonic system in the Hamiltonian, collective-field approach. We derive a c... more We consider a large-N anyonic system in the Hamiltonian, collective-field approach. We derive a collective-field representation of the Hamiltonian. In some interesting cases we determine the ground-state energy and the corresponding anyon collective motions.
As shown by Virasoro, Sakita and one of the authors (J.L.G.), dual models can be constructed from... more As shown by Virasoro, Sakita and one of the authors (J.L.G.), dual models can be constructed from any two dimensional, conformal invariant field model. This construction is carried out here in the case of the Thirring model.
ABSTRACT The authors use the collective-field method to discuss the weak- and strong-coupling pha... more ABSTRACT The authors use the collective-field method to discuss the weak- and strong-coupling phases of the one-plaquette U(N)-invariant model. In both phases they obtain a unified description in terms of collective fields and their collections. The ground-state energy including the next-to-leading-order term is finite owing to explicit cancellation of divergences except at the critical point of the phase transition.
We analyse a specific, duality-based generalization of the hermitean matrix model. The existence ... more We analyse a specific, duality-based generalization of the hermitean matrix model. The existence of two collective fields enables us to describe specific excitations of the hermitean matrix model. By using these two fields, we construct topologically nontrivial solutions (BPS solitons) of the model. We find the low-energy spectrum of quantum fluctuations around the uniform solution. Furthermore, we construct the wave functional of the ground state and obtain the corresponding Green function.
The main goal of this study is to assess the potential of green roofs and walls as a mitigation m... more The main goal of this study is to assess the potential of green roofs and walls as a mitigation measure for the climate-change-driven growth of building energy consumption in extremely hot climates. A comprehensive, interdisciplinary methodology was developed that bridged climate change and building modeling. The residential building stock of Qatar was considered, with a two-story residential villa selected as a representative of the stock and consequently a case study. Weather scenarios were created for the years 2020, 2050, and 2080, and four building renovation scenarios were developed. The findings suggested that without any mitigation measures, residential building energy consumption in Qatar could increase by up to 9%, 17%, and 30% in 2020, 2050, and 2080, respectively. The addition of 5-cm expanded polystyrene and the installation of energy-efficient windows proved to be far more efficient than the addition of green walls and roofs under the climate conditions (30% reduction in energy consumption vs. 3%). Additionally, the environmental impact of green wall and roof maintenance, specific to Qatar, should be considered. However, in the final judgment, other positive effects of a green infrastructure (such as the effect on air quality, heat island effect, and health of the inhabitants) should be considered.
Changed weather conditions (increased outdoor air temperatures and solar radiation levels) caused... more Changed weather conditions (increased outdoor air temperatures and solar radiation levels) caused by the climate change could decrease building heat demand in the future. Furthermore, improved building insulation levels implemented due to the new building energy efficiency legislation could further decrease the demand for heating services. The main scope of this study is to present a methodology to assess the possible long-term effects of climate change on building heat demand on a large scale. A building heat demand model based on the thermoelectricity analogy was developed within this study, which is capable to take into account all relevant weather (outdoor air and solar radiation) and building (geometry, thermal properties etc.) parameters. The model was verified through the comparison with Design Builder v4.6. (Energy Plus v.8.3), with satisfactory outcome (average percentage error in annual heat demand of 4.47% and standard deviation between the hourly heat demand values of 2.73), and then applied on the district of Alvalade located in Lisbon (Portugal). Three weather scenarios were developed (low, medium, high temperature and solar radiation increase) along with three district renovation scenarios (shallow, intermediate, deep). For the representation of the results, district heat demand density and heat demand slope coefficient (slope of the heat demand-outdoor temperature function) were used. The results suggest that heat demand density could decrease within the range of 22.3-52.4% in 2050 compared to 2010, depending on weather and renovation scenario studied. Accordingly, the heat demand slope coefficient increases within the range of-1.79 W/°C to-1.43 W/°C. However, even with all the heat demand reductions, the district still remains feasible for district heating (with heat demand density higher than 50GWh/km2/yr for all studied scenarios).
Zeitschrift Für Physik A Hadrons And Nuclei, Feb 1, 1969
ABSTRACT Dynamical relations between masses and coupling constants have been studied using the su... more ABSTRACT Dynamical relations between masses and coupling constants have been studied using the superconvergent sum rule technique in vector meson — vector meson scattering. Unessential complications due to the spin have been removed by defining a set of 25 KSF invariant amplitudes. Commonly accepted analyticity properties and asymptotics estimated arguing along the line of unitarity then lead to superconvergent sum rules for three amplitudes. Their saturation by one-intermediate-particle contributions in the processes , BB andA 1A 1 results in a system of nine coupled equations which have been approximately solved for coupling constants and a--B- A 1 mass sum rule.
ABSTRACT Dynamical relations between masses and coupling constants have been studied using the su... more ABSTRACT Dynamical relations between masses and coupling constants have been studied using the superconvergent sum rule technique in vector meson — vector meson scattering. Unessential complications due to the spin have been removed by defining a set of 25 KSF invariant amplitudes. Commonly accepted analyticity properties and asymptotics estimated arguing along the line of unitarity then lead to superconvergent sum rules for three amplitudes. Their saturation by one-intermediate-particle contributions in the processes , BB andA 1A 1 results in a system of nine coupled equations which have been approximately solved for coupling constants and a--B- A 1 mass sum rule.
This volume contains the lectures covering the main lines of developments in the presently most a... more This volume contains the lectures covering the main lines of developments in the presently most active field of particle physics: string field theory, anomalies, unification and physics beyond the Planck length. The lectures are generally pedagogical in style, designed at the postdoctoral level, but at the same time they introduce one to the most recent results in the field.
Heat demand may decrease in the future due to changing weather conditions and building renovation... more Heat demand may decrease in the future due to changing weather conditions and building renovation policies, possibly impacting the efficiency and profitability of renewable heat production and distribution systems which are commonly proposed in the literature as an adequate measure for building sector emissions mitigation. In this work, the potential evolution of building heat demand in characteristic locations (within heating dominant climates) is assessed for different scenarios by using a sample building as a case study. Three future weather scenarios were created based on a previously developed methodology, along with one building renovation scenario based on market penetration rates of different renovation measures. Heat demand was calculated through a heat demand model previously developed and validated by the authors. To represent the results, heat demand-outdoor temperature function parameters were used. The results indicated that the impact of changed weather conditions was significantly lower than the impact of building renovation. Overall, the difference in the parameters rate of decrease/increase was lower than 2% between weather scenarios for the same year considered. After the initial building renovation in 2020, the slope coefficient of the outdoor temperature-heat demand function increased between 45% and 51%, while the intercept decreased within the range A c c e p t e d M a n u s c r i p t 2 of 48% and 51 % (depending on the weather scenario and location considered). The reduction in the number of heating hours was almost negligible in the colder climates considered, while in the warmer climates the decrease rate was significant-0.8% and 43% of heating hours respectively in 2050 compared to 2010, for the medium weather scenario. Such decrease in demand and heating hours could significantly impact the operational parameters of heat production and distribution units, as well as their feasibility.
We consider a large-N Chern-Simons theory for the attractive bosonic matter (Jackiw-Pi model) in ... more We consider a large-N Chern-Simons theory for the attractive bosonic matter (Jackiw-Pi model) in the Hamiltonian collective-field approach based on the 1/N expansion. We show that the dynamics of low-lying density fluctuations around the semiclassical wall solution is governed by the Calogero Hamiltonian . The relationship between the Chern-Simons coupling constant k and the statistical parameter l signalizes some sort of statistical transmutation accompanying the dimensional reduction of the initial problem.
Narrow-leaved ash (Fraxinus angustifolia Vahl) is a fast growing and light demanding forest tree ... more Narrow-leaved ash (Fraxinus angustifolia Vahl) is a fast growing and light demanding forest tree species. In Croatia, the largest complexes of this species can be found along the Sava River. The main objective of research was to determine the influence of environmental drivers on budburst dates. Research was carried out in the clonal seed orchard of Nova Gradiška through four vegetation seasons (2012, 2014, 2015 and 2016). In total, 42 clones were involved in this study. The target phase of phenology monitoring was the phase with distinct budburst and partial segregation of bud scales. Three environmental drivers were selected (temperature, precipitation and insolation) with three different summing dates (1 st November, 1 st December and 1 st January). Statistical data processing included the following analyses: Spearman Rank Correlation, Linear Regression, Multiple Regression and Stepwise Multiple Regression. Among three tested environmental drivers in all of the analyses performed in the study, insolation proved to be the most important factor in the description of budburst dates in narrow-leaved ash.
We consider a large-N anyonic system in the Hamiltonian, collective-field approach. We derive a c... more We consider a large-N anyonic system in the Hamiltonian, collective-field approach. We derive a collective-field representation of the Hamiltonian. In some interesting cases we determine the ground-state energy and the corresponding anyon collective motions.
As shown by Virasoro, Sakita and one of the authors (J.L.G.), dual models can be constructed from... more As shown by Virasoro, Sakita and one of the authors (J.L.G.), dual models can be constructed from any two dimensional, conformal invariant field model. This construction is carried out here in the case of the Thirring model.
ABSTRACT The authors use the collective-field method to discuss the weak- and strong-coupling pha... more ABSTRACT The authors use the collective-field method to discuss the weak- and strong-coupling phases of the one-plaquette U(N)-invariant model. In both phases they obtain a unified description in terms of collective fields and their collections. The ground-state energy including the next-to-leading-order term is finite owing to explicit cancellation of divergences except at the critical point of the phase transition.
We analyse a specific, duality-based generalization of the hermitean matrix model. The existence ... more We analyse a specific, duality-based generalization of the hermitean matrix model. The existence of two collective fields enables us to describe specific excitations of the hermitean matrix model. By using these two fields, we construct topologically nontrivial solutions (BPS solitons) of the model. We find the low-energy spectrum of quantum fluctuations around the uniform solution. Furthermore, we construct the wave functional of the ground state and obtain the corresponding Green function.
The main goal of this study is to assess the potential of green roofs and walls as a mitigation m... more The main goal of this study is to assess the potential of green roofs and walls as a mitigation measure for the climate-change-driven growth of building energy consumption in extremely hot climates. A comprehensive, interdisciplinary methodology was developed that bridged climate change and building modeling. The residential building stock of Qatar was considered, with a two-story residential villa selected as a representative of the stock and consequently a case study. Weather scenarios were created for the years 2020, 2050, and 2080, and four building renovation scenarios were developed. The findings suggested that without any mitigation measures, residential building energy consumption in Qatar could increase by up to 9%, 17%, and 30% in 2020, 2050, and 2080, respectively. The addition of 5-cm expanded polystyrene and the installation of energy-efficient windows proved to be far more efficient than the addition of green walls and roofs under the climate conditions (30% reduction in energy consumption vs. 3%). Additionally, the environmental impact of green wall and roof maintenance, specific to Qatar, should be considered. However, in the final judgment, other positive effects of a green infrastructure (such as the effect on air quality, heat island effect, and health of the inhabitants) should be considered.
Changed weather conditions (increased outdoor air temperatures and solar radiation levels) caused... more Changed weather conditions (increased outdoor air temperatures and solar radiation levels) caused by the climate change could decrease building heat demand in the future. Furthermore, improved building insulation levels implemented due to the new building energy efficiency legislation could further decrease the demand for heating services. The main scope of this study is to present a methodology to assess the possible long-term effects of climate change on building heat demand on a large scale. A building heat demand model based on the thermoelectricity analogy was developed within this study, which is capable to take into account all relevant weather (outdoor air and solar radiation) and building (geometry, thermal properties etc.) parameters. The model was verified through the comparison with Design Builder v4.6. (Energy Plus v.8.3), with satisfactory outcome (average percentage error in annual heat demand of 4.47% and standard deviation between the hourly heat demand values of 2.73), and then applied on the district of Alvalade located in Lisbon (Portugal). Three weather scenarios were developed (low, medium, high temperature and solar radiation increase) along with three district renovation scenarios (shallow, intermediate, deep). For the representation of the results, district heat demand density and heat demand slope coefficient (slope of the heat demand-outdoor temperature function) were used. The results suggest that heat demand density could decrease within the range of 22.3-52.4% in 2050 compared to 2010, depending on weather and renovation scenario studied. Accordingly, the heat demand slope coefficient increases within the range of-1.79 W/°C to-1.43 W/°C. However, even with all the heat demand reductions, the district still remains feasible for district heating (with heat demand density higher than 50GWh/km2/yr for all studied scenarios).
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