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B-PaDY: robot co-worker in a bumper assembly line

In an automobile assembly line, many processes require control and human intervention. A human’s dexterity and ability to react to unpredictable changes in production volume and product specifications are necessary for these processes. Thus, it remains difficult to rely on robots or other automated systems. Conversely, some tasks, such as moving to a tool rack and delivering...

A recessive allele for delayed flowering at the soybean maturity locus E9 is a leaky allele of FT2a, a FLOWERING LOCUS T ortholog

Background Understanding the molecular mechanisms of flowering and maturity is important for improving the adaptability and yield of seed crops in different environments. In soybean, a facultative short-day plant, genetic variation at four maturity genes, E1 to E4, plays an important role in adaptation to environments with different photoperiods. However, the molecular basis of...

Deep sequencing uncovers commonality in small RNA profiles between transgene-induced and naturally occurring RNA silencing of chalcone synthase-A gene in petunia

Matsumura Kentaro Yoshida Ryohei Terauchi Akito Taneda Akira Kanazawa 0 0 Research Faculty of Agriculture, Hokkaido University , Sapporo 060-8589 , Japan Background: Introduction of a transgene that

Genetic variation in four maturity genes affects photoperiod insensitivity and PHYA-regulated post-flowering responses of soybean

Background Absence of or low sensitivity to photoperiod is necessary for short-day crops, such as rice and soybean, to adapt to high latitudes. Photoperiod insensitivity in soybeans is controlled by two genetic systems and involves three important maturity genes: E1, a repressor for two soybean orthologs of Arabidopsis FLOWERING LOCUS T (GmFT2a and GmFT5a), and E3 and E4, which...

Static Properties of Baryons in the SU(3) Skyrme Model

We compute the static propeties of baryons in a variant of SU(3) Skyrme model proposed previously, where we can assume Fπ its empirical value without contraction to the baryon mass-spectrum. The predicted static observables, including gA, are mostly consistent with experiment. The effect of the higher order terms in the time derivative of the rotational variables is reasonably...

A Note on the Phenomenology of the SU(3) Skyrme Model

We recalculate the baryon mass-spectrums in the SU(3) Skyrme-model to confirm the difficulty that we must assume much smaller Fπ than the measured one to reproduce baryon masses. Then, we point out a way to avoid the difficulty, by utilizing an ambiguity which exists in defining quantized Hamiltonian.

The Anomalous Magnetic Moment of an Electron at Finite Temperature

Tetsuo YABUKI 0 Akira KANAZAWA 0 0 Department of Physics, Hokkaido University , Sapporo 060 We investigate the anomalous magnetic moment of an electron at finite temperature using "Thermo Field

Analysis beyond Leading Twist for F2p-n Moments

Masahiro HARUYAMA 0 Akira KANAZAWA 0 0 Laboratory of Physics, Medical College of Asahikawa, Asahikawa 078-11 Department of Physics, Hokkaido University , Sapporo 060 (Received March 3, 1980) Prog

Analyses of Singlet Structure Function Moments and Tests of QCD

We analyze the flavor-singlet moments using the simple formula which includes the next-to-the-leading-order corrections. We obtain ΛM̅S̅ = 0.61 ± 0.19 GeV and Λ(Λn) = 0.14 ± 0.05 GeV which are consistent with the results of the previous analyses of the nonsinglet moments.

Higher Order Effects of Structures Function Moments

We investigate the Q2-dependence of both the flavor non-singlet and the singlet Nachtmann moments of deep inelastic structure functions in the framework of QCD with full order-g̅2 corrections. The non-singlet moments-data are consistent with QCD as have been claimed so fat. The order-g̅2 corrections are absorbed almost to the resetted value of scale parameter. However, there is a...

Bias-Free Determination of Δ(1232) Pole Position

Tadashi MIYAKOSHI 0 Akira KANAZAWA 0 0 Department of Physics, Hokkaido University , Sapporo 060 A stabilized bias-free method for pole-search is applied to the L1 (1232). The pole position predicted

On the Pole-Search Problem of Scattering Amplitudes in L2 Norm

Akira KANAZAWA 0 Tadashi MIYAKOSHI 0 0 Department of Physics, Hokkaido University , Sapporo The pole-search problem of scattering amplitudes is investigated in L' norm. It is pointed out that the

Pion Electromagnetic Form Factor with Dipion Unitarity

We construct the pion electromagnetic form factor which is consistent with the dipion unitarity and the analyticity, and it is compatible with the Veneziano-Lovelace-type pion-pion scattering amplitude. Several assumptions are made which restrict the validity of the result in the low and intermediate energy regions. The form factor thus obtained can be fixed uniquely if we give...

On the Static Approximation of the γ5 Meson Theory

The 1/m correction to the static approximation assumed by Sugawara has been estimated within the non-recoil framework in the case of the low energy pion-nucleon scattering. It is here assumed that the Foldy transformation generates a valid static Hamiltonian in the relativistic γ5-theory. It is shown that two extra parameters appear besides three renormalized coupling constants...

Optimum Renormalization-Scheme in the Perturbative QCD

A recipe to realize the optimum choice of the renormalization scheme (RS) is presented in the perturbative QCD. The optimum RS(ORS) is the scheme in which the residual terms of a turncated expansion is minimized. Hence, the ORS depends on the physical quantity in question. The recipe tells us how to determine the scale parameter Λ by analyzing the data on one quantity and how to...

A Choice of Expansion Parameter and Higher Order Corrections in QCD

Masahiro HARUYAMA 0 Akira KANAZAWA Osamu ABE 0 Laboratory of Physics, Medical College of Asahikawa Asahikawa 078-11 Department of Physics, Hokkaido University , Sapporo 060 (Received February 27

Three-Pion Decays of η and K and the Final State Interactions

Akira KANAZAWA 0 Tadaaki KARIYA 0 0 Department of Physics, Hokkaido University , Sapporo The three-pion decays of the r; and the K mesons are simultaneously investigated in the light of new data and

X0-η Mixing and Radiative Meson Decays

The two-gamma decay of the η-meson and other related processes are reinvestigated in a simple quark model. We assume that the [36] meson states have the same space part of the wave functions, and the η- and X0-mesons are approximately in the pure nucleon and the lambda quark-antiquark states, respectively. We predict Γ(η→2γ)=1.36 KeV which is quite consistent with the recent...

A Dynamical Approach to the Leptonic Decays of Baryons

Akira KANAZAWA Tetsuro SAKUMA 0 0 IJej:>artment of Engineering Sciences, 1-Iokkaido University , .Syaj:>jJoro The leptonic decays of hyperons are analysed using the dynamical self-consistency

V-Strap Model for PS-PS Scattering and the Stabilities of Various Solutions

Akira KANAZAWA 0 Naoki TOKUDA 0 0 DejJartment of Physics We examine the V (J ~'=1-) -strap model of the scattering between the mass-degenerated PS mesons, in connection with the possible dynamical