Hitachi (Netherlands)

Abstract This article presents a model agnostic methodology for producing property price indices. The motivation to develop this methodology is to include non-linear and non-parametric models, such as Machine Learning (ML), in the pool of algorithms to produce price indices. The key innovation is the use of individual out-of-time prediction errors to measure price changes. The data used in this study consist of 29,998 commercial real estate transactions in New York, in the period 2000–2019. The results indicate that the prediction accuracy is higher for the ML models compared to linear models. On the other hand, ML algorithms depend more on the data used for calibration; they produce less stable results when applied to small samples and may exhibit estimation bias. Hence, measures to reduce or eliminate bias need to be implemented, taking into consideration the bias and variance trade-off.

We have investigated the properties of YBa/sub 2/Cu/sub 3/O/sub 7-x/ ramp-edge Josephson junctions with surface-modified barriers produced by Ar-ion irradiation followed by oxygen annealing. The fabricated junctions displayed RSJ-like I-V characteristics and excellent uniformity. The stray capacitance of the junctions was estimated from the ramp-edge structure. The junction capacitance was obtained by subtracting the stray capacitance from the shunting capacitance. We estimated the barrier thickness from the junction capacitance, and found that the critical current density of the junction increased exponentially with decreasing barrier thickness. The relative dielectric constant of the barriers ranged from 13 to 18.

This paper examines what determines the correlation between prices and turnover in European housing markets. Using a panel vector autoregressive model, we find that there is a particularly strong feedback mechanism between prices and turnover. Momentum effects are another important reason why prices and turnover are correlated. Common underlying factors, such as GDP and interest rates, also explain part of the price-turnover correlation. The results in this paper imply that, to understand price and turnover dynamics, it is important to model prices and turnover as two interdependent processes. There is a considerable bias in the coefficient estimates of standard house price models if this dependency is not explicitly taken into account.

日立変成地域のカンブリア系について，ジルコンU-Pb SHRIMP年代値を追加し，既報の年代値をまとめ，各地層を再定義し，地質図を改めた．層序については，早期から晩期のカンブリア系を日立火山深成複合岩体として一括し，その中に赤沢層，玉簾層，変成花崗岩類，変成ポーフィリィを含めた．玉簾層の一部を分離して滝沢層を新設した．西堂平層の堆積年代は白亜紀前期である．さらに，白亜紀後期に火成岩貫入と中圧型変成作用が起った．これは阿武隈帯の竹貫変成岩類の変成履歴とも共通し，東北日本列島でこのような急激なテクトニクスが起こった時期があったと推定した．古第三紀の中央構造線が日本列島全体を縦断していたと仮定して，日本海形成前における，カンブリア系を含む日立古生層と東北日本列島基盤の復元を試み，日立古生層や阿武隈帯は中国東北部の佳木斯・ハンカ地帯に近接することを示した．カンブリア系日立火山深成複合岩体は北中国地塊の東縁に帰属することを主張した．

The StartingTogether program (in Dutch SamenStarten) is a family-centred method for early identification of social-emotional and behavioural problems in young children. Nurses in preventive child health care find it challenging to: determine family issues and need for care; provide education; refer to social services; increase parent empowerment. To mitigate these challenges, we developed and evaluated the StartingTogether App, offering nurses and parents conversational support, tailored education and information on social services. A mixed method design, consisting of a qualitative evaluation of the StartingTogether App, with group discussions with nurses (N = 14) and a pilot test (N = 5), and a randomized controlled trial, evaluating the effectiveness of the app. Nurses (N = 33) made home visits to parents (N = 194), in teams with or without the app. Nurses were surveyed on the challenges experienced during visits. Parents (N = 166) were surveyed on their satisfaction with health care and app. Nurses were interviewed on the benefits and barriers to use the app. Parents with the StartingTogether App were more satisfied with the visits than parents without (p = .002). Parents with a high educational level were more satisfied with the visits than the parents with a low educational level. With the app, their satisfaction level was similar (p < .001). Nurses using the app felt more equipped to communicate with parents (p = .012) and experienced that parents were more knowledgeable and skilled (p = .001). Parents felt that with the app the nurse was more polite (p = .02), listened more carefully (p = .03), and had more time (p = .02). Nurses with the app gave parents more opportunity to ask questions (p = .001) and gave clearer answers (p < .001). The qualitative evaluation indicated that some nurses needed extra time to develop the habit of using the app. The StartingTogether App contributes to parents’ satisfaction with home visits. An interaction effect between parents’ educational level and rating of home visits indicated that the app has an additional value for parents with a lower educational level. Applying mobile applications, such as the StartingTogether App, potentially has a positive effect on communication between nurses and parents about the family situation in relation to parent empowerment and the child’s development. The study is registered with ISRCTN under the number ISRCTN12491485 , on August 23, 2018. Retrospectively registered.

In the fabrication of steel structures, welding is widely utilized to join the materials. Due to the welding, distortions are inevitably generated, and these distortions may cause problems in accuracy or labor costs. In this research, to establish an analysis method which can predict the welding distortions in complex large-scale structures, we proposed a new analysis method based on the Idealized Explicit FEM. In the proposed method, an algebraic multigrid method was introduced to the Idealized Explicit FEM to achieve an efficient analysis in realistic structures. The proposed method was applied to the prediction of the welding distortion in the base structures of the construction machine. The number of welding passes was 28. The predicted and measured distortions were compared. As a result, it was demonstrated that the proposed method has a high analysis accuracy. The analysis finished within the realistic time within 35 hours. The influence of welding sequence on the deformation was also investigated by changing welding sequence. The result indicated that the welding sequence may have considerable effect on the welding distortion and is necessary to be investigated in advance of the production.

This paper presents a method for estimating the absolute lock effect in bolted joints during off-road vehicle operation. There is a good linear relation between axial tension decrease tendency (Loosening phenomenon) and the operation time (or mileage or number of operations) after the tightening on logarithmic coordinates. Based on this relation, this report leads to two estimating methods described below.

We report the occurrence of preiswerkite and högbomite as inclusion phases within the garnets of eclogite from the Aktyuz area of Northern Tien Shan, Kyrgyzstan. Preiswerkite and högbomite occur both as a constituent of multiphase solid inclusions (MSI) and as single discrete grains in the mantle and rim of the garnets. However, they do not occur in the core of the garnet and in the matrix of the eclogite. Preiswerkite is associated with the minerals paragonite ± staurolite ± Mg-taramite ± Na-biotite ± hematite ± högbomite ± chlorite ± titanite ± phengite ± magnetite, and högbomite is associated with paragonite ± preiswerkite ± staurolite ± hematite ± chlorite ± Na-biotite ± magnetite in MSI. The average compositions of preiswerkite and högbomite are (Na0.96K0.02Ca0.01)0.99(Mg1.52Fe2+0.54VIAl0.93)2.99(IVAl1.93Si2.07)4.00O10(OH)2 and (Mg1.47Fe2+3.02Zn0.04Fe3+1.45)5.98(Fe3+0.31Al15.13Ti0.56)16O30(OH)2, respectively. Na-biotite, with an average composition of (Na0.89K0.07Ca0.01)0.97(Mg1.66Fe2+0.69VIAl0.63)2.98(IVAl1.57Si2.43)4.00O10(OH)2, corresponding to the intermediate composition between preiswerkite and aspidolite (i.e., Na-phlogopite), is also observed. The compositions of the newly found preiswerkite and Na-biotite with similar XMg values (0.66-0.78) are arrayed along preiswerkite-aspidolite solid solution series. The mode of occurrence of inclusion phases in garnets may suggest that the activity of Na-Al-rich and Si-undersaturated aqueous fluids played a major role in the formation of preiswerkite during the prograde stage of high-pressure eclogitic metamorphism.

A novel DC current transformer (CT) based on the Faraday Effect has developed for DC railway power system. The advantages of the developed optical fiber CT are simple and light structure, easiness to handle and robustness to the external magnetic field caused by the adjacent electric current. The basic characteristics of the optical fiber CT are confirmed and compared with those of the conventional Hall CT and saturable reactor CT. Through the fired test and DC short circuit test, it is shown that the optical fiber CT realizes enough response and enough resolution for the practical application. Furthermore, its strong robustness to the external magnetic field is experimentally confirmed.

茨城県多賀山地の日立変成古生層は，産出化石により前期石炭紀以降の地層とされてきた．しかし最近広範にSHRIMP年代が測定され，多賀山地に日本最古のカンブリア系が60 km2以上にわたって広く分布することが明らかになった．A班では，原岩構造のわかるカンブリア系のうち，枕状構造や発泡構造，急冷組織などがみられる火山岩を原岩とする赤沢層と，堆積構造を残す砂泥質堆積岩や礫岩を原岩とする西堂平層，さらに赤沢層に貫入するカンブリア紀花崗岩類を見学する．また，赤沢層を不整合で覆う石炭系大雄院層基底部の礫岩などを見学する．今後，これらの露頭は日本におけるカンブリア系の模式地となることが予想される．今回は当初の研究成果に基づくものであり，今後さらに多くの研究者によってより深く研究され，日本列島形成の初期の様子が明らかになるであろう．

This article introduced the calculating and testing method about the inductances of the PM brushless DC motor.This method changed the calculating and testing about self and mutual inductances in the ABC axis into the d-q axis using the axis changing.The method can calculate the d-axis and q-axis inductances directly through measuring the voltage,current and power under the different rotor position.The method was applied to a prototype PM brushless DC motor to analysis the inductance parameters variation with the rotor position,current,frequency and temperature.

We have theoretically investigated poly-Si and metal gates on Hf-related high-k gate dielectrics. First, we have investigated the cause of the substantial threshold voltage (Vth) shifts observed in Hf-related high-k gate stacks with p+poly-Si gates. The oxygen vacancy (Vo) level in ionic HfO2 is located in a relatively higher part of the band gap. If the p+poly-Si-gate is in contact with HfO2, Vo formation in the HfO2 induces a subsequent electron transfer across the interface because of the higher energy level position of Vo, causing a substantial Vth shifts in p+poly-Si gate MISFETs. Next, we also investigate the microscopic electronic structures at metal gates/HfO2 interfaces. We have found that the wave functions of metal induced gap states (MIGS) have large amplitudes both around Hf and O atoms, which may be the cause of unusual work function behaviors of p-like metals.

アメリカビーバー（Castor canadensis），雄，12歳，が継続的な吐出を呈し死亡した。剖検では，狭窄を伴う食道壁の肥厚を認めた。病理組織学的検査では，食道において粘膜面から外膜にかけての全層に渡って角化細胞への分化を示す腫瘍細胞が島状，索状に増殖しており，その中心部には同心円状の角化巣（癌真珠）が認められた。以上の所見より，食道扁平上皮癌と診断した。本報告は，アメリカビーバーにおける食道扁平上皮癌の初の報告である。

Dynamic dispatching rules that allocate resources to tasks in real-time play a critical role in ensuring efficient operations of many automated material handling systems across industries. Traditionally, the dispatching rules deployed are typically the result of manually crafted heuristics based on domain experts’ knowledge. Generating these rules is time-consuming and often sub-optimal. As enterprises increasingly accumulate vast amounts of operational data, there is significant potential to leverage this big data to enhance the performance of automated systems. One promising approach is to use Decision Transformers, which can be trained on existing enterprise data to learn better dynamic dispatching rules for improving system throughput. In this work, we study the application of Decision Transformers as dynamic dispatching policies within an actual multi-agent material handling system and identify scenarios where enterprises can effectively leverage Decision Transformers on existing big data to gain business value. Our empirical results demonstrate that Decision Transformers can improve the material handling system’s throughput by a considerable amount when the heuristic originally used in the enterprise data exhibits moderate performance and involves no randomness. When the original heuristic has strong performance, Decision Transformers can still improve the throughput but with a smaller improvement margin. However, when the original heuristics contain an element of randomness or when the performance of the dataset is below a certain threshold, Decision Transformers fail to outperform the original heuristic. These results highlight both the potential and limitations of Decision Transformers as dispatching policies for automated industrial material handling systems.

A satisfactory theory must account quantitatively both for the Kerr magneto-optical loop displacement and the anomalous torque segments observed in exchange-coupled ferrimagnetic bilayer films. The bilayer free magnetic energy density, E(α), must be even [E(α) = E(-α)] in angular dependence and in the form of an inverted parabola near α = 0 (H perpendicular to the plane). The thin wall model satisfies symmetry; however versions of the distributed wall model do so only partially. The anomalous torque behavior cannot be properly predicted from any of the theories employed.

This paper presented the control system for compressor of electrical vehicle air conditioning system, In this system the design and reseach of communication interface and driven control system technology are carried out. The communication interface is suitable for automotive parts—controller area network(CAN) communication. The drive control part in cars is based on the efficient permanent magnet synchronous motor, the vector variable frequency control technology principle and algorithm of space vector pulse width modulation(SVPWM) were described, modeled and simulated in MATLAB/SIMULINK systems build a simulation model of the control systems and components. The results proved the validity of the method, and provide a theoretical basis for design and debugging of the actual compressor control.

飼育下アメリカビーバー（Castor canadensis）にハズバンダリートレーニングを実施し，行動的保定による尾静脈からの採血に初めて成功した。採血部位の刺激には拮抗条件づけや系統的脱感作を行い，採血の成功はトレーニング開始から第31 セッション目であった。ハズバンダリートレーニングを取り入れることで動物の捕獲や麻酔を行わずに採血が可能となり，正の強化を用いて実施したことから，動物福祉の観点からも望ましいと考えられた。

For tightening bolted joints, the calibrated wrench method is widely used in practice. In this method the axial tension of a bolt is controlled by measuring the wrench torque. Also widely know the high initial axial tension assure the tightening reliability. However the method is not so accurate since the measurement of axial tension is indirect. In this paper, the statistical distribution of the magnitude of the combined stress(the von Mises Equivarent Stress) by shear strain energy criterion in bolts, which are tightened by the calibrated wrench method was formulated. And also we discussed the safety factor for capability stress limit and/or fatigue limit vs. additional stress by working load. As an example, the distribution of combined stress was shown for a metric screw. Finally this research established the analysis and calculating routine for the optimum tightening torque on bolted joints using the ellipse of confidence limit.

The heat pump driers(HPD)have great energy efficiency advantage compared to conventional driers and have wide market prospects.For special operating mode of heat pump driers such as high discharge pressure,heavy load,high suction and discharge temperature,the compressor for HPD core component has been optimized RD.Firstly,the refrigerant has selected the appropriate compressor of HPD,thereby effectively reducing the intake and discharge temperature.Then compressor pump structure has been fully new design,under working condition of HPD to enhance the pump reliability and efficiency.Thirdly the motor of compressor is also optimized according HPD working condition.Finally the reliability assessment program of suitable HPD has been enacted and in accordance with the conditions of this assessment,the life assessment carried out.HPD compressors are successfully completed based on above solutions.

Coherent structures were experimentally investigated in a heated air jet vertically ejected from a round nozzle of 30mm in diameter. Some experiments of the present jet, mean velocity at the exit U_a=1.5〜5.0m/s and temperature difference ΔT=0〜100K, were conducted by smoke wire method and smoke method. Coherent structures, vortex pairing and side jet were observed. The side jet occurred in the jet with ΔT=75, 100K and ρ/ρ_∞=0.74〜0.8.