Nippon Telegraph and Telephone Corporation

Norihiro Fujimoto

Hisatoshi Kasahara

Tomoyasu Nagai

Shunsuke Tsuda

Seiya Sato

Hitoshi Mizuno

Takashi Sugiura

Masayuki Tsuda

Takuya Kamisho

Kazuhiko Goto

Ryuta Ishii

Yosuke Okamura

Yoshihiro Iriyama

Masashi Shintaku

An occluded hydrogen content estimation method implemented by an occluded hydrogen content estimation device performs an occluded hydrogen content estimation step in which, based on an occluded hydrogen unit content which is a content of hydrogen occluded in a metal due to a change in humidity from a wet state to a dry state, a period after the metal is placed, and meteorological data corresponding to the period for an area where the metal is located, a content of occluded hydrogen that is absorbed in the metal for the period after the metal is placed is estimated. In the occluded hydrogen content estimation step, the occluded hydrogen content is estimated by multiplying the number of rainfalls in the meteorological data by the occluded hydrogen unit content.

Storage hydrogen amount estimation method and device

Provided are a reinforcing method and a reinforcing structure for a manhole having a neck part in a position shifted from the middle part of an upper slab which allow the buried manhole to be reinforced sufficiently against stress inflicted thereon while reducing the operation and material costs involved in the reinforcement. The manhole reinforcing method according to the invention is a method for reinforcing a manhole including a rectangular trunk part having an upper slab, a sidewall, and a lower slab and a neck part provided in a position shifted from a middle part of the upper slab of the trunk part, the method includes providing a strip-shaped reinforcing member of reinforced fiber at the upper slab and the lower slab while refraining from providing the strip-shaped reinforcing member at the sidewall, and fixing an upper part of the sidewall and the upper slab and a lower part of the sidewall and the lower slab each by a reinforcing member at the middle part of the sidewall in the longitudinal direction of the trunk part.

Reinforcement method and reinforcement structure of a manhole

A conduit inspection method includes a first specifying step (S) of specifying, as a normal section of a conduit, a section from a first end (Pa) of the conduit that is connected to one manhole to a first position (P1) in the conduit at which airtightness can be confirmed, a second specifying step (S) of specifying, as a normal section of the conduit, a section from a second end (Pb) of the conduit that is connected to another manhole to a second position (P2) in the conduit at which airtightness can be confirmed, and a third specifying step (S) of specifying a section from the first position (P1) to the second position (P2) as an abnormal section of the conduit.

Pipeline inspection method for carrying out an airtightness inspection on a conduit

A degradation predicting method is a degradation predicting method for predicting degradation of a reinforced concrete structure buried in the ground, the method including: a condensation occurrence condition evaluating step (S) of evaluating a condensation occurrence condition on which condensation occurs on reinforcing steel; a condensation time calculating step (S) of calculating a condensation time that is a total time in which condensation occurs on the reinforcing steel based on the condensation occurrence condition for each of a plurality of the reinforced concrete structures; a threshold determining step (S) of determining a threshold of underground depth at which the reinforced concrete structure is less prone to degradation based on a relationship between the condensation time and a underground depth of the reinforced concrete structure; and a degradation predicting step (S) of predicting degradation of a prediction-target reinforced concrete structure based on the threshold.

Deterioration prediction method

A calculation apparatus includes a first acquisition unit that acquires a first approximation expression based on a change in a temperature of a temperature controlled member with respect to a change in an outside temperature measured for a plurality of temperatures of a temperature controlling member, a second acquisition unit that obtains a second approximation expression based on the first approximation expression, a temperature input unit that receives input of a first set temperature of the temperature controlled member and a second set temperature of the temperature controlling member, a generation unit that substitutes the second set temperature into the second approximation expression to generate a third approximation expression representing relationship between the outside temperature and the temperature of the temperature controlled member, and a calculation/output unit that substitutes the first set temperature into the third approximation expression to calculate an outside temperature to be set.

Calculation device, calculation method, and program

A communication system () includes multiple transmission apparatuses () that transmit beacon signals to a moving body (), and a terminal apparatus () that is mounted in the moving body () and, upon receiving a beacon signal of a predetermined intensity or more from a transmission apparatus (), presents information to a user based on the beacon signal of the predetermined intensity or more and a past reception record.

Communication system, communication method, terminal device, and program

An object is to estimate the course of a movable terminal device. An information processing system (S) includes a plurality of transmission devices () capable of transmitting predetermined radio waves, a terminal device () capable of receiving the predetermined radio waves, and a management device () communicably connected to the terminal device. The terminal device () measures intensities of radio waves received from the transmission devices () at predetermined times, and transmits measurement results to the management device (). The management device () calculates distances between the terminal device () and each of the transmission devices () at the predetermined times from the measurement results, and calculates positions of the terminal device () at the predetermined times from the calculated distances.

Information processing system, information processing method, management device, and program

Provided are a reinforcing member and a construction method capable of easily securing a side wall contact height even in the case where installed equipment is provided on a side wall. A reinforcing member according to the present invention is a reinforcing member which reinforces a manhole by being fixed to the manhole in a state in which at least part of the reinforcing member is in contact with a side wall inner surface of an inner surface of the manhole, an insertion hole into which an anchor bolt provided to protrude from the inner surface of the manhole can be inserted is formed, and the insertion hole is an elongated hole which allows the reinforcing member to move relative to the anchor bolt in an inserted state in which the anchor bolt is inserted into the insertion hole and an unfixed state in which the reinforcing member is not fixed to the manhole.

Growing community of inventors

Tokyo, Japan

Norihiro Fujimoto