K. Niwa

3.0k total citations
19 papers, 762 citations indexed

About

K. Niwa is a scholar working on Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering and Ceramics and Composites. According to data from OpenAlex, K. Niwa has authored 19 papers receiving a total of 762 indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Atomic and Molecular Physics, and Optics, 7 papers in Electrical and Electronic Engineering and 5 papers in Ceramics and Composites. Recurrent topics in K. Niwa's work include Photorefractive and Nonlinear Optics (7 papers), Ferroelectric and Piezoelectric Materials (3 papers) and Glass properties and applications (3 papers). K. Niwa is often cited by papers focused on Photorefractive and Nonlinear Optics (7 papers), Ferroelectric and Piezoelectric Materials (3 papers) and Glass properties and applications (3 papers). K. Niwa collaborates with scholars based in Japan and United States. K. Niwa's co-authors include Yasunori Furukawa, Kenji Kitamura, Shunji Takekawa, Terence E. Mitchell, Venkatraman Gopalan, Eisuke Suzuki, Hideki Hatano, J.M. Encinar, Nobuo Iyi and Yoshiyuki Yajima and has published in prestigious journals such as Applied Physics Letters, Stroke and Biochemical and Biophysical Research Communications.

In The Last Decade

K. Niwa

19 papers receiving 739 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
K. Niwa Japan 10 636 484 294 123 53 19 762
Peter A. Thielen United States 14 487 0.8× 724 1.5× 261 0.9× 86 0.7× 59 1.1× 29 910
J.-O. Ndap United States 14 306 0.5× 631 1.3× 315 1.1× 79 0.6× 30 0.6× 23 688
D. Haertle Germany 13 489 0.8× 428 0.9× 166 0.6× 70 0.6× 110 2.1× 24 624
R. W. Hansen United States 11 239 0.4× 249 0.5× 43 0.1× 58 0.5× 95 1.8× 20 457
S.M. Ryvkin Russia 10 234 0.4× 324 0.7× 166 0.6× 43 0.3× 26 0.5× 38 458
Toru Mizunami Japan 13 387 0.6× 748 1.5× 56 0.2× 73 0.6× 11 0.2× 72 838
Т. С. Шамирзаев Russia 18 782 1.2× 536 1.1× 421 1.4× 112 0.9× 33 0.6× 104 903
W. J. Brya United States 10 224 0.4× 178 0.4× 268 0.9× 61 0.5× 70 1.3× 15 435
P. Randall Staver United States 7 191 0.3× 174 0.4× 171 0.6× 42 0.3× 13 0.2× 15 432
D.J.W. Klunder Netherlands 12 389 0.6× 542 1.1× 98 0.3× 124 1.0× 14 0.3× 35 635

Countries citing papers authored by K. Niwa

Since Specialization
Citations

This map shows the geographic impact of K. Niwa's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by K. Niwa with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites K. Niwa more than expected).

Fields of papers citing papers by K. Niwa

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by K. Niwa. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by K. Niwa. The network helps show where K. Niwa may publish in the future.

Co-authorship network of co-authors of K. Niwa

This figure shows the co-authorship network connecting the top 25 collaborators of K. Niwa. A scholar is included among the top collaborators of K. Niwa based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with K. Niwa. K. Niwa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

19 of 19 papers shown
1.
Niwa, K., Rie Tanaka, Toyoko Ishikawa, et al.. (2003). Two lysosomal membrane proteins, LGP85 and LGP107, are delivered to late endosomes/lysosomes through different intracellular routes after exiting from the trans-Golgi network. Biochemical and Biophysical Research Communications. 301(4). 833–840. 15 indexed citations
2.
Niwa, K., Yasunori Furukawa, Shunji Takekawa, & Kenji Kitamura. (2000). Growth and characterization of MgO doped near stoichiometric LiNbO3 crystals as a new nonlinear optical material. Journal of Crystal Growth. 208(1-4). 493–500. 69 indexed citations
3.
Furukawa, Yasunori, Kenji Kitamura, Shunji Takekawa, et al.. (2000). The correlation of MgO-doped near-stoichiometric LiNbO3 composition to the defect structure. Journal of Crystal Growth. 211(1-4). 230–236. 99 indexed citations
4.
Niwa, K., et al.. (2000). Comparison of the efficacy of two air-based contrast agents in dogs. European Journal of Ultrasound. 11(2). 127–133. 4 indexed citations
5.
Niwa, K., et al.. (1999). In vivo kinetics of microbubbles of SH U 508 A (Levovist®): comparison with Indocyanine Green in rabbits. Ultrasound in Medicine & Biology. 25(9). 1365–1370. 4 indexed citations
6.
Furukawa, Yasunori, Kenji Kitamura, Eisuke Suzuki, & K. Niwa. (1999). Stoichiometric LiTaO3 single crystal growth by double crucible Czochralski method using automatic powder supply system. Journal of Crystal Growth. 197(4). 889–895. 164 indexed citations
7.
Furukawa, Yasunori, et al.. (1999). Improved Properties of Stoichiometric LiNbO3 for Electro-Optic Applications. Journal of Intelligent Material Systems and Structures. 10(6). 470–475. 8 indexed citations
8.
Ereditato, A., K. Niwa, & P. Strolin. (1998). OPERA: an emulsion detector for a long baselin ν − ν oscillation search. Nuclear Physics B - Proceedings Supplements. 66(1-3). 423–427. 3 indexed citations
9.
Kitamura, Kenji, Yasunori Furukawa, K. Niwa, Venkatraman Gopalan, & Terence E. Mitchell. (1998). Crystal growth and low coercive field 180° domain switching characteristics of stoichiometric LiTaO3. Applied Physics Letters. 73(21). 3073–3075. 210 indexed citations
10.
Furukawa, Yasunori, Kenji Kitamura, Shunji Takekawa, K. Niwa, & Hideki Hatano. (1998). Stoichiometric Mg:LiNbO_3 as an effective material for nonlinear optics. Optics Letters. 23(24). 1892–1892. 132 indexed citations
11.
Yogo, Toshinobu, Koichi Kikuta, K. Niwa, et al.. (1997). Processing of β-BaB2O4 thin films through metal organics. Journal of Sol-Gel Science and Technology. 9(2). 201–209. 9 indexed citations
12.
Garino, G., K. Niwa, H. Hirosawa, et al.. (1997). A straw drift chamber for the TAGX spectrometer. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 388(1-2). 100–108. 1 indexed citations
13.
Yogo, Toshinobu, K. Niwa, Koichi Kikuta, et al.. (1997). Synthesis of β-BaB2O4 thin films from a metallorganic precursor. Journal of Materials Chemistry. 7(6). 929–932. 9 indexed citations
14.
Itoh, Taiji, Masayasu Matsumoto, Natsuko Takahashi, et al.. (1995). Perfusion Imaging of the Brain by B-Mode Ultrasonography. Stroke. 26(12). 2353–2357. 8 indexed citations
15.
Yamazaki, H., K. Maeda, S Asano, et al.. (1995). TheC12(γ,K+) reaction in the threshold region. Physical Review C. 52(3). R1157–R1160. 9 indexed citations
16.
Yogo, Toshinobu, Koichi Kikuta, K. Niwa, et al.. (1994). Sol-gel processing of β-BaB 2 O 4 thin films through metal organics. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 2288. 484–484. 2 indexed citations
17.
Hirano, Shin‐ichi, Toshinobu Yogo, Koichi Kikuta, Katsuya Yamagiwa, & K. Niwa. (1994). Processing of β-BaB2O4 powders and thin films through metal alkoxide. Journal of Non-Crystalline Solids. 178. 293–301. 12 indexed citations
18.
Nakano, Takayoshi, Osamu Sato, Takeshi Kawai, et al.. (1992). Research and development of scintillating fiber tracker for nu /sub mu /- nu /sub tau / oscillation experiment. IEEE Transactions on Nuclear Science. 39(4). 680–684. 3 indexed citations
19.
FUNADA, Hisashi, Shin‐ichi Fujita, K. Niwa, & Kenichi Hattori. (1979). The Significance of Propionibacteria in Bone Marrow Cultures. Japanese Journal of Medicine. 18(1). 1–5. 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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