Imaginary part of action, Future functioning as hidden variables (2009)
A model -- by myself and Masao Ninomiya -- which in principle predicts the initial conditions in a way as to minimze a certain functional of the history of the Universe through both past and future...
Initial Condition Model from Imaginary Part of Action and the Information Loss (2009)
We review slightly a work by Horowitz and Maldecena solving the information loss problem for black holes by having inside the blackhole - near to the singularity - a boundary condition, as e.g the no...
On the Smallness of the Cosmological Constant in SUGRA Models Inspired by Degenerate Vacua (2009)
Froggatt, C. D., Nevzorov, R., Nielsen, H. B.
In the no-scale supergravity global symmetries protect local supersymmetry and a zero value for the cosmological constant. The breakdown of these symmetries, which ensures the vanishing of the vacuum...
Homolumo Gap from Dynamical Energy Levels (2009)
Andric, I., Jonke, L., Jurman, D., Nielsen, H. B.
We introduce a dynamical matrix model where the matrix $X$ is interpreted as a Hamiltonian representing interaction of a bosonic system with a single fermion. We show how a system of second-quantized...
New Bound States of Top and Beauty Quarks at the Tevatron and LHC (2009)
Das, C. R., Froggatt, C. D., Laperashvili, L. V., Nielsen, H. B.
The present paper is based on the assumption that heavy quarks bound states exist in the Standard Model (SM). Considering New Bound States (NBS) of top-anti-top quarks (named T-balls) we have shown...
String from Veneziano model (2009)
This article is about my memories from the discovery that the Veneziano model describes in fact interacting strings. I came to the understanding of that the dual or Veneziano model is really a model...
P. B. Jeppesen, P. Lund, I. B. Gottschalck, H. B. Nielsen, J. J. Holst, J. Mortensen, ...
Background and aims. Glucagon-like peptide 2 (GLP-2) has been shown to improve intestinal absorption in short bowel syndrome (SBS) patients in a short-term study. This study describes safety,...
Zaar, M., Lauritzen, B., Secher, N. H., Krantz, T., Nielsen, H. B., Madsen, P. L., ...
Background This study tested the circulatory effectiveness of post-trauma administration of a large intravascular volume expander, hydroxyethyl starch 130/0.4 (HES), vs standard lactated Ringer's...
P. B. Jeppesen, P. Lund, I. B. Gottschalck, H. B. Nielsen, J. J. Holst, J. Mortensen, ...
Background and aims. Glucagon-like peptide 2 (GLP-2) has been shown to improve intestinal absorption in short bowel syndrome (SBS) patients in a short-term study. This study describes safety,...
P. B. Jeppesen, P. Lund, I. B. Gottschalck, H. B. Nielsen, J. J. Holst, J. Mortensen, ...
Background and aims. In a short-term study, Glucagon-like peptide 2 (GLP-2) has been shown to improve intestinal absorption in short bowel syndrome (SBS) patients. This study describes longitudinal...
P. B. Jeppesen, P. Lund, I. B. Gottschalck, H. B. Nielsen, J. J. Holst, J. Mortensen, ...
Background and aims. In a short-term study, Glucagon-like peptide 2 (GLP-2) has been shown to improve intestinal absorption in short bowel syndrome (SBS) patients. This study describes longitudinal...
New Bound States of Heavy Quarks at LHC and Tevatron (2008)
Das, C. R., Froggatt, C. D., Laperashvili, L. V., Nielsen, H. B.
The present paper is based on the assumption that heavy quarks bound states exist in the Standard Model (SM). Considering New Bound States (NBSs) of top-anti-top quarks (named T-balls) we have shown...
Bregar, G., Dvoeglazov, V. V., Filippini, J., Khlopov, M. Yu., Kleppe, A., Lukman, D., ...
Contents: 1. Does the Dark Matter Consist of Baryons of New Heavy Stable Family Predicted by the Approach Unifying Spins and Charges? (G. Bregar and N.S. Mankoc Borstnik) 2. Lorentz Transformations...
Remarkable coincidence for the top Yukawa coupling and an approximately massless bound state (2008)
Froggatt, C. D., Nielsen, H. B.
We calculate, with several corrections, the non-relativistic binding by Higgs exchange and gluon exchange between six top and six anti-top quarks (actually replaced by left-handed b quarks from time...
New Bound States of several Top-quarks bound by Higgs Exchange (2008)
Froggatt, C. D., Nielsen, H. B.
It is suggested that there is a fine tuning principle remarkably arranging the top-quark Yukawa coupling to be just so as to make the mass $m_{12}$ of a bound state of 6 top + 6 anti-top quarks...
Cosmological Constant in SUGRA Models Inspired by Degenerate Vacua (2008)
Froggatt, C. D., Nevzorov, R., Nielsen, H. B.
It is well known that global symmetries protect local supersymmetry and a zero value for the cosmological constant in no--scale supergravity. A particular breakdown of these symmetries, which ensures...
On the origin of Z(2) symmetry in the Two-Higgs Doublet extension of the SM (2008)
Froggatt, C D, Nevzorov, R, Nielsen, H B, Thompson, D
We argue that the consistent implementation of the multiple point principle (MPP) in the general non-supersymmetric two Higgs doublet model (2HDM) can lead to a set of approximate global custodial...
On the origin of approximate custodial symmetry in the Two-Higgs Doublet Model (2008)
Froggatt, C. D., Nevzorov, R., Nielsen, H. B., Thompson, D.
We argue that the consistent implementation of the multiple point principle (MPP) in the general non-supersymmetric two Higgs doublet model (2HDM) can lead to a set of approximate global custodial...
Froggatt, C D, Laperashvili, L V, Nevzorov, R B, Nielsen, H B, Das, C R
The present talk is based on the assumption that New Bound States (NBSs) of top-anti-top quarks (named T-balls) exist in the Standard Model (SM): a) there exists the scalar 1S - bound state of...
Froggatt, C. D., Laperashvili, L. V., Nevzorov, R. B, Nielsen, H. B., Das, C. R.
The present talk is based on the assumption that New Bound States (NBSs) of top-anti-top quarks (named T-balls) exist in the Standard Model (SM): a) there exists the scalar 1S - bound state of...
The present study focuses on process inhibitions in Danish centralized biogas plants. Collection of data from the plants and a number of interviews showed that inhibitions occur frequently. High...
Oleskowicz-Popiel, P, Ambus, P, Carter, M.S., Dalgaard, T., Hauggaard-Nielsen, H, Johansen, A, ...
The research programme called “international research cooperation and organic integrity” was commenced for a period 2006-2010. It is coordinated by DARCOF (The Danish Research Centre for Organic...
COMBINED BIOGAS AND BIOETHANOL PRODUCTION IN ORGANIC FARMING (2008)
Schmidt, J.E., Oleskowicz-Popiel, P., Thomsen, M.H., Nielsen, H.B., Thomsen, A.B
Bioenergy production from local bioresources has a great potential. It is important to reduce dependency on fossil fuels and decrease green house gas emission in organic agriculture (OA). Both biogas...
The present study focuses on process inhibitions in Danish centralized biogas plants. Collection of data from the plants and a number of interviews showed that inhibitions occur frequently. High...
Oleskowicz-Popiel, P, Ambus, P, Carter, M.S., Dalgaard, T., Hauggaard-Nielsen, H, Johansen, A, ...
The research programme called “international research cooperation and organic integrity” was commenced for a period 2006-2010. It is coordinated by DARCOF (The Danish Research Centre for Organic...
COMBINED BIOGAS AND BIOETHANOL PRODUCTION IN ORGANIC FARMING (2008)
Schmidt, J.E., Oleskowicz-Popiel, P., Thomsen, M.H., Nielsen, H.B., Thomsen, A.B
Bioenergy production from local bioresources has a great potential. It is important to reduce dependency on fossil fuels and decrease green house gas emission in organic agriculture (OA). Both biogas...
Homolumo Gap and Matrix Model (2007)
Andric, I, Jonke, L, Jurman, D, Nielsen, H B
We discuss a dynamical matrix model by which probability distribution is associated with Gaussian ensembles from random matrix theory. We interpret the matrix M as a Hamiltonian representing...
Homolumo Gap and Matrix Model (2007)
Andric, I., Jonke, L., Jurman, D., Nielsen, H. B.
We discuss a dynamical matrix model by which probability distribution is associated with Gaussian ensembles from random matrix theory. We interpret the matrix M as a Hamiltonian representing...
Localization of Gauge Fields and Monopole Tunnelling (2007)
Dvali, G., Nielsen, H. B., Tetradis, N.
We study the dynamical localization of a massless gauge field on a lower-dimensional surface (2-brane). In flat space, the necessary and sufficient condition for this phenomenon is the existence of...
Constrained Gauge Fields from Spontaneous Lorentz Violation (2007)
Chkareuli, J L, Froggatt, C D, Jejelava, J G, Nielsen, H B
Spontaneous Lorentz violation realized through a nonlinear vector field constraint of the type $A_{\mu}^{2}=M^{2}$ ($M$ is the proposed scale for Lorentz violation) is shown to generate massless...
Constrained Gauge Fields from Spontaneous Lorentz Violation (2007)
Chkareuli, J. L., Froggatt, C. D., Jejelava, J. G., Nielsen, H. B.
Spontaneous Lorentz violation realized through a nonlinear vector field constraint of the type $A_{\mu}A^{\mu}=M^{2}$ ($M$ is the proposed scale for Lorentz violation) is shown to generate massless...
Froggatt, C D, Nevzorov, R, Nielsen, H B
We argue that multiple point principle (MPP) can be used to ensure CP conservation and the absence of flavour changing neutral currents within the two Higgs doublet model (2HDM). We also discuss...
Froggatt, C. D., Nevzorov, R., Nielsen, H. B.
We argue that multiple point principle (MPP) can be used to ensure CP conservation and the absence of flavour changing neutral currents within the two Higgs doublet model (2HDM). We also discuss...
Froggatt, C D, Nevzorov, R, Nielsen, H B
The multiple point principle (MPP) can be used to suppress non--diagonal flavour transitions and CP violation in the two Higgs doublet extension of the standard model. We discuss the quasi--fixed...
Smallness of the cosmological constant and the multiple point principle (2007)
Froggatt, C D, Nevzorov, R, Nielsen, H B
In this talk we argue that the breakdown of global symmetries in no--scale supergravity (SUGRA), which ensures the vanishing of the vacuum energy density near the physical vacuum, leads to a natural...
Fixed point scenario in the Two Higgs Doublet Model inspired by degenerate vacua (2007)
Froggatt, C D, Nevzorov, R, Nielsen, H B, Thompson, D
We consider the renormalisation group flow of Higgs and Yukawa couplings within the simplest non--supersymmetric two Higgs doublet extension of the Standard Model (SM). In this model the couplings...
Fixed point scenario in the Two Higgs Doublet Model inspired by degenerate vacua (2007)
Froggatt, C. D., Nevzorov, R., Nielsen, H. B., Thompson, D.
We consider the renormalisation group flow of Higgs and Yukawa couplings within the simplest non--supersymmetric two Higgs doublet extension of the Standard Model (SM). In this model the couplings...
Froggatt, C. D., Nevzorov, R., Nielsen, H. B.
The multiple point principle (MPP) can be used to suppress non--diagonal flavour transitions and CP violation in the two Higgs doublet extension of the standard model. We discuss the quasi--fixed...
Smallness of the cosmological constant and the multiple point principle (2007)
Froggatt, C. D., Nevzorov, R., Nielsen, H. B.
In this talk we argue that the breakdown of global symmetries in no--scale supergravity (SUGRA), which ensures the vanishing of the vacuum energy density near the physical vacuum, leads to a natural...
9th Workshop on What Comes Beyond the Standard Model (2006)
Mankoc-Borstnik, N S, Nielsen, H B, Froggatt, Colin D, Lukman, Dragan
Borstnik, N. Mankoc, Nielsen, H. B.
The genuine Kaluza-Klein-like theories (with no fields in addition to gravity) have difficulties with the existence of massless spinors after the ompactification of some of dimensions of...
A simple physical interpretation of the critical dimension of space- time in dual models (2005)
The energy due to zero point fluctuations of the dual string is calculated and shown to be divergent. It is made finite by introducing a cut-off. The result is non-covariant but invariant under...
Dual-model spectrum analysis, using Virasoro-algebra representations (2005)
Frampton, Paul H, Nielsen, H B
The spectrum of states in the unit intercept Veneziano model is studied by noticing that there is exactly one physical state in each irreducible representation of the Virasoro algebra for spacelike...
A study of the Hilbert space properties of the Veneziano model operator formalism (2005)
Brink, L, Frampton, Paul H, Nielsen, H B
The mathematical basis of the operator formalism for the N-particle generalization of Veneziano's beta function dual model for two-body scattering is discussed. It is shown how the whole theory can...
The MAP kinase substrate MKS1 is a regulator of plant defense responses (2005)
Andreasson, E, Jenkins, T, Brodersen, P, Thorgrimsen, S, Petersen, N H T, Zhu, S, ...
Cosmological constant in SUGRA models and the multiple-point principle (2004)
Froggatt, C., Laperashvili, L.V., Nevzorov, R.B., Nielsen, H.B.
An attempt is made to explain the tiny order of magnitude of the cosmological constant in a model involving the following ingredients: supersymmetry breaking in N = 1 supergravity and the...
IMM METHODS FOR NON-LINEAR LEAST SQUARES PROBLEMS (2004)
K. Madsen, H. B. Nielsen, O. Tingleff, Mathematical Modelling
Family Replicated Gauge Group Models (2003)
Froggatt, C. D., Laperashvili, L. V., Nielsen, H. B., Takanishi, Y.
Family Replicated Gauge Group models of the type SU(n)^N\times SU(m)^N, (SMG)^3 and (SMG\times U(1)_{B-L})^3 are reviewed, where SMG=SU(3)_{c}\times SU(2)_{L}\times U(1)_{Y} is the gauge symmetry...
Family replicated gauge groups and large mixing angle solar neutrino solution (2002)
Froggatt, C.D., Nielsen, H.B., Takanishi, Y.
We present a modification of our previous family replicated gauge group model, which now generates the large mixing angle MSW solution rather than the experimentally disfavoured small mixing angle...
Quantum numbers of anti-grand-unified-theory Higgs fields from the quark-lepton spectrum (2002)
Froggatt, C.D., Nielsen, H.B., Smith, D.J.
A series of Higgs field quantum numbers in the anti-grand-unification model, based on the gauge group SMG/sup 3/*U(1)/sub f/, is tested against the spectrum of quark and lepton masses and mixing...
Minimal mixing of quarks and leptons in the SU(3) theory of flavour (2002)
Chkareuli, J.L., Froggatt, C.D., Nielsen, H.B.
We argue that flavour mixing, both in the quark and lepton sector, follows the minimal mixing pattern, according to which the whole of this mixing is basically determined by the physical mass...
Avoiding cross hybridization by choosing nonredundant targets on cDNA arrays (2002)
Summary: PROBEWIZ designs PCR primers for amplifying probes for cDNA arrays. The probes are designed to have minimal homology to other expressed sequences from a given organism. The primer selection...
Standard model Higgs boson mass from borderline metastability of the vacuum (2001)
Froggatt, C.D., Nielsen, H.B., Takanishi, Y.
We study imposing the condition that the standard model effective Higgs potential should have two approximately degenerate vacua, such that the vacuum we live in is just barely metastable: the one in...
Minimal Mixing of Quarks and Leptons in the SU(3) Theory of Flavour (2001)
Chkareuli, J. L., Froggatt, C. D., Nielsen, H. B.
We argue that flavour mixing, both in the quark and lepton sector, follows the minimal mixing pattern, according to which the whole of this mixing is basically determined by the physical mass...
Why Nature has made a choice of one time and three space coordinates? (2001)
Borstnik, N. Mankoc, Nielsen, H. B.
We propose a possible answer to one of the most exciting open questions in physics and cosmology, that is the question why we seem to experience four- dimensional space-time with three ordinary and...
Spontaneously generated gauge invariance (2001)
Chkareuli, J.L., Froggatt, C.D., Nielsen, H.B.
We argue that the non-observability of the spontaneous breakdown of Lorentz symmetry (SBLS) caused by the vacuum expectation values of vector fields could provide the origin of all internal...
SUSY a consequence of smoothness? (2001)
Nielsen, H. B., Pallua, S., Prester, P.
The consequences of certain simple assumptions like smoothness of ground state properties and vanishing of the vacuum energy (at least perturbatively) are explored. It would be interesting from the...
Lorentz Invariance and Origin of Symmetries (2001)
Chkareuli, J. L., Froggatt, C. D., Nielsen, H. B.
In this letter we reconsider the role of Lorentz invariance in the dynamical generation of the observed internal symmetries. We argue that, generally, Lorentz invariance can only be imposed in the...
Spontaneously Generated Gauge Invariance (2001)
Chkareuli, J. L., Froggatt, C. D., Nielsen, H. B.
We argue that the non-observability of the spontaneous breakdown of Lorentz symmetry (SBLS) caused by the vacuum expectation values of vector fields could provide the origin of all internal...
A Neutrino Mass Matrix Model with many Quantum charges and No SUSY (2001)
We present a model based on our favourite gauge group which we call Anti-GUT and which in its extended form to be applied for neutrinos in the see-saw picture consists in that we have for each family...
Lorentz invariance and origin of symmetries (2001)
Chkareuli, J.L., Froggatt, C.D., Nielsen, H.B.
The dynamic generation of gauge invariance for the role of Lorentz invariance and the origin of internal symmetries was analyzed. The physical non-observability of the spontaneous breakdown of...
Neutrino oscillations in extended Anti-GUT model (2000)
Froggatt, C.D., Nielsen, H.B., Takanishi, Y.
What we call the Anti-GUT model is extended a bit to include also right handed neutrinos and thus make use of the see-saw mechanism for neutrino masses. This model consists in assigning gauge quantum...
Kasper Olsen, Lars Jensen, Martin G. Harris, Juri Rolf, M. Blau, F. Larsen, ...
Contents Acknowledgements 1 1 Introduction 5 3 4 CONTENTS Chapter 1 Introduction Understanding the restrictions imposed by duality in quantum field theory and string theory is an important goal. One...
Thermodynamic Properties of the Piecewise Uniform String (1997)
Brevik, I., Bytsenko, A. A., Nielsen, H. B.
The thermodynamic free energy F is calculated for a gas whose particles are the quantum excitations of a piecewise uniform bosonic string. The string consists of two parts of length L_I and L_II,...
Could there be a Fourth Generation of Quarks Without More Leptons? (1996)
Froggatt, C. D., Nielsen, H. B., Smith, D. J.
We investigate the possibility of adding a fourth generation of quarks. We also extend the Standard Model gauge group by adding another SU(N) component. In order to cancel the contributions of the...
Semiconductor Spectroscopy and Ablation Processes with the Vanderbilt Fel (1993)
Tolk, N., Albridge, R. G., Barnes, A. V., McKinley, J. T., Nielsen, H. B., Ueda, A., ...
Direct Solution of Sets of Linear Equations whose Matrix is Sparse, Symmetric and Indefinite (1979)
DUFF, I. S., REID, J. K., MUNKSGAARD, N., NIELSEN, H. B.
We consider the use of 1�1 and 2�2 pivots for direct solution of sets of linear equations whose matrix is sparse and symmetric. Inclusion of 2�2 pivots permits a stable decomposition to be...
Volianitis, S, Fabricius-Bjerre, A, Overgaard, A, Strømstad, M, Bjarrum, M, Carlson, C, ...
Intense exercise decreases the cerebral metabolic ratio of O2 to carbohydrates (glucose +½ lactate) and the cerebral lactate uptake depends on its arterial concentration, but whether these variables...
Jeppesen, P. B., Lund, P., Gottschalck, I. B., Nielsen, H. B., Holst, J. J., Mortensen, J., ...
Background and aims. Glucagon-like peptide 2 (GLP-2) has been shown to improve intestinal absorption in short bowel syndrome (SBS) patients in a short-term study. This study describes safety,...
Jeppesen, P. B., Lund, P., Gottschalck, I. B., Nielsen, H. B., Holst, J. J., Mortensen, J., ...
Background and aims. In a short-term study, Glucagon-like peptide 2 (GLP-2) has been shown to improve intestinal absorption in short bowel syndrome (SBS) patients. This study describes longitudinal...