Public service is a measure of the performance of the government's most visible. Communities can directly assess the government Keywords: Innovation, Public Services, Local Government AbstrakPelayanan publik merupakan suatu tolok ukur kinerja pemerintah yang paling kasat mata. Masyarakat dapat menilai langsung kinerja pemerintah berdasarkan pelayanan yang diterimanya. Untuk itu kualitas pelayanan publik di semua kementerian/lembaga adalah suatu hal yang mendasar yang harus segera ditingkatkan. Peningkatan pelayanan publik, Kementerian Pendayagunaan Aparatur Negara dan Reformasi Birokrasi (KemenPAN RB) menerapkan kebijakan bahwa sejak tahun 2014 adalah tahun inovasi pelayanan publik. Seluruh instansi pemerintah, baik di pusat maupun daerah

ESR measurements in the double-chain compound NH 4 CuCl 3 , which has magnetization plateaus at one-quarter and three-quarters of the saturation magnetization, have been performed in magnetic fields up to 30 T in the frequency range ϳ95 762 GHz. It is found that the frequency versus field diagrams for H k a and H k b coincide when normalized by the g factors. In each plateau region, a pair of excitations expressed as v g͑H 2 H lc ͒ and v g͑H hc 2 H͒ are observed, where H lc and H hc are the lower and higher edge fields of the plateau, respectively. These two modes correspond to the quantum gap in the lower-and higher-field halves in the plateau region. [S0031-9007(98)08295-7] PACS numbers: 75.30.Cr, Recently, the plateau of the magnetization curve in a quantum spin system has been attracting considerable attention. The magnetization plateau is predicted at one-third of the saturation magnetization M s in a spin- 2Heisenberg chain with ferromagnetic-ferromagneticantiferromagnetic interactions [1,2] and at half of M s in a spin-1 2 antiferromagnetic alternating Heisenberg chain with the next-nearest-neighbor interactions [3,4] and a spin-1 antiferromagnetic alternating Heisenberg chain [5,6]. The plateau results from the quantum gap which opens between the ground state and the lowest excited state in the appropriate magnetic field range. Since the magnetization plateau appears irrespective of the magnetic field direction, the plateaus in these systems are different from those observed in the metamagnetic systems. Recently, Oshikawa et al. [7] demonstrated that the magnetization curves of general quantum spin chains with axial symmetry can have plateaus, and that the magnetization is quantized at the plateaus as n͑S 2 m͒ an integer, where n is the period of the ground spin state, S is the magnitude of spin, and m is the magnetization per site in the unit of gm B . The excitation gap responsible for the plateau can exist only when this condition is satisfied. All of the above-mentioned plateaus satisfy this quantization condition. Experimentally, the magnetization plateau has been observed at ͑ 1 2 ͒M s in an S 1 antiferromagnetic alternating chain system ͓Ni 2 ͑methyl-bis͑3-aminopropyl͒amine͒ 2 ͑m-ox͒ ͑m-N 3 ͔͒ClO 4 ? 0.5H 2 O [8].In our previous paper [9], we have reported that the magnetization curve of NH 4 CuCl 3 has two plateaus at one-quarter and three-quarters of M s . NH 4 CuCl 3 is isostructural with KCuCl 3 at room temperature [10,11]. The feature of the crystal structure is the double chain of edge-sharing CuCl 6 octahedra along the crystallographic a axis. From the chemical point of view, the present system seems to be described as an S 1 2 Heisenberg double-spin chain system.In NH 4 CuCl 3 , two plateaus are clearly observed at ͑ 1 4 ͒M s and ͑ 3 4 ͒M s . It was confirmed that the magnetization curves for H k a and H k b coincide when normalized by the g factor, and that the plateaus appear in every external field direction. Therefore, the origin of the plateaus is attributed not to the magnetic aniso...

Low-temperature specific heat and magnetization measurements have been performed on the quantum spin system NH4CuCl3 which has magnetization plateaus at one-quarter and three-quarters of the saturation magnetization. It is found that the present system undergoes three-dimensional magnetic ordering at TN = 1.3 K. It is suggested that one-quarter of the spins are ordered below TN, and the remaining spins are in the singlet state. The small magnetic entropy at TN indicates that the phase transition occurs under the condition of a well-developed spin correlation around TN. The field dependence of the three-dimensional ordering is also investigated on the basis of magnetization measurements. Based on this evidence, a magnetic phase diagram for NH4CuCl3 is proposed.

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Indonesia menjadi salah satu Negara yang pengguna aktif harian twitternya cukup tinggi, berdasarkan hal tersebut twitter dapat dijadikan sebagai media untuk melakukan analisis sentimen terhadap topik corona. Analisis sentimen merupakan salah satu cabang dari text mining yang melakukan proses klasifikasi pada dokumen atau teks. Penelitian ini bertujuan untuk mengetahui bagaimana dampak virus corona di Indonesia sesuai opini masyarakat melalui twitter. Pengumpulan data dilakukan dengan teknik web scraper yang menghasilkan 1000 record sejak tanggal 20 Januari sampai 1 Februari 2020, data yang telah di scraping kemudian dianalisis mengikuti tahapan text mining yaitu case folding, tokenizing dan filtering. Hasil dari penelitian ini menunjukan persentase opini masyarakat terhadap virus corona yaitu 79% negatif, 11% Netral dan 10% Positif. Kata kunci : corona, analisis sentimen, twitter;