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"This book is intended for advanced students and young researchers interested in the analysis of partial differential equations and differential geometry. It discusses elementary concepts of surface geometry in higher-dimensional Euclidean spaces, in particular the differential equations of Gauss-Weingarten together with various integrability conditions and corresponding surface curvatures. It includes a chapter on curvature estimates for such surfaces, and, using results from potential theory and harmonic analysis, it addresses geometric and analytic methods to establish the existence and regularity of Coulomb frames in their normal bundles, which arise as critical points for a functional of total torsion."

"ABSTRACTAs the largest nation with an Islamic population, Indonesia is also home to an intellectual tradition that has received, preserved and cultivated the Platonic-Aristotelean philosophy, the seedbed of Western Philosophical tradition. Along with Hinduism, Buddhism and other religious traditions, we must not forget the enormous influence of the hard working Chinese traders in Indonesia and in the ASEAN who are inspired by Confucian ethics. The main features of these great Asiatic philosophical traditions blend within the context of our malay-polynesian linguistic sensibilities and our colonial encounter with the West. It shows that despite our differences, there are many commonalities that confirm the parallel structure of humanity's great depositories of wisdom and the basic neurological structure of all human beings."

"Kerangka naratif buku ini berawal ketika sang tokoh, Almustafa bersiap naik ke kapal yang akan membawanya pulang ke negeri asalnya setelah 12 tahun berada di negeri asing. Ia dihentikan oleh sekelompok penduduk kota tempatnya tinggal selama 12 tahun itu, yang memintanya berbicara tentang rahasia kehidupan yang membentang antara kelahiran dan kematian."

"Teknik rekonstruksi double bundle ACL (DBACL) atau single bundle ACL (SBACL) adalah cara operasi untuk memperbaiki putusnya anterior cruciate ligament (ACL), namun teknik rekonstruksi terbaik masih menjadi perdebatan. Tes Lachman, tes Pivot, dan rolimeter memberikan gambaran stabilitas anterior dan rotasi sendi lutut sedangkan biomarker cartilage oligomeric matrix protein cairan sinovium lutut (sfCOMP) dan MRI T2-map dapat menggambarkan integritas kartilago sendi. Tujuan penelitian ini adalah menganalisis stabilitas sendi dan integritas kartilago untuk mengetahui teknik rekonstruksi ACL yang terbaik, DBACL atau SBACL.Dilakukan uji klinis acak tersamar tunggal pada pasien Rumah Sakit Pusat Angkatan Darat Gatot Soebroto Jakarta yang menjalani operasi rekonstruksi ACL pada Januari 2019– Januari 2022. Pada kedua kelompok dilakukan tes Lachman, tes pivot, dan rolimeter, serta penilaian sfCOMP dan p MRI T2-map. Uji statistik beda dua kelompok dilakukan setelah uji normalitas pada karakteristik subjek penelitian, luaran stabilitas dan integritas sendi pada saat sebelum operasi, setelah tiga dan enam bulan operasi. Seluruh data diuji normalitas sebarannya dengan menggunakan uji Shapiro-Wilk atau Kolmogorov-Smirnov. Analisis bivariat dilakukan dengan uji T tidak berpasangan atau Mann-Whitney, analisis data kategorik menggunakan uji Chi square, analisis berpasangan dengan menggunakan Friedman dan tes Wilcoxon. Uji korelasi menggunakan Spearman. Batas kemaknaan yang dianggap bermakna adalah p < 0,05.Dari 43 pasien yang dianalisis, sebanyak 22 pasien masuk kelompok SBACL dan 21 pasien kelompok DBACL. Tidak terdapat perbedaan bermakna pada tes Lachman (p = 0,849, p = 0,126, dan p = 0,466), tes pivot (p = 0,877, p = 0,678, p = 0,904), rolimeter (p = 0,395, p = 0,566, p = 0,455), sfCOMP (p = 0,375, p = 0,990, p = 0,409), MRI T2-map (p = 0,846, p = 0,106, p >0,999), dan MRI T2-map semikuantitatif (p = 0,970, p = 0,643, p = 0,190) pada kedua kelompok sebelum operasi serta setelah tiga bulan dan enam bulan operasi. Rerata pemeriksan stabilitas sendi setiap kelompok mengalami perbaikan dari sebelum operasi, setelah tiga bulan dan enam bulan operasi (p < 0,05). Kelompok SBACL dan DBACL tidak memiliki perbedaan bermakna pada nilai sfCOMP (SBACL, p = 0,58; DBACL, p = 0,084), MRI T2-map (SBACL, p = 0,055; DBACL, p = 0,717) dan MRI T2-map semikuantitatif (SBACL, p = 0,05; DBACL, p = 0,06) saat setelah tiga bulan dan enam bulan operasi. Biomarker sfCOMP menurun setelah tiga bulan dan tidak menunjukkan perbaikan setelah enam bulan pada kedua kelompok. Pemeriksaan rolimeter tidak memiliki perbedaan bermakna dengan penanda integritas kartilago sfCOMP dan MRI T2-map. Disimpulkan rekonstruksi DBACL memberikan luaran klinis, biokimia, dan radiologis setara dengan SBACL ditinjau dari tes Lachman, tes pivot, rolimeter, serta pengukuran sfCOMP dan penilaian MRI T2-map. Tidak ada perbedaan bermakna antara stabilitas sendi dengan kadar sfCOMP dan MRI T2-map, setelah operasi rekonstruksi SBACL dan DBACL.

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The double bundle ACL (DBACL) or single bundle ACL (SBACL) reconstruction technique is a surgical technique to repair the ruptured anterior cruciate ligament (ACL). Examination of the Lachman test, Pivot test, and rolimeter represent the anterior and rotational stability of the knee joint. In addition, the biomarker cartilage oligomeric matrix protein in synovial fluid of the knee (sfCOMP) and MRI T2-map can be used to provide an overview of joint cartilage integrity. Therefore, the best ACL reconstruction technique, DBACL or SBACL, can be identified by analyzing changes in joint stability and cartilage integrity.

A single-blind randomized clinical trial was conducted to determine whether DBACL reconstruction surgery is superior to SBACL reconstruction in terms of subclinical measurements of joint stability and cartilage integrity. Lachman test, pivot test, and rolimeter, as well as the sfCOMP measurement and the MRI T2-map assessment, were evaluated on both groups. In addition, normality tests on the characteristics of the study subjects on each outcome of joint stability and joint integrity were conducted, followed by paired and unpaired statistical tests of both groups.

Of the 43 patients analyzed, 22 were allocated to the SBACL group and 21 to the DBACL group. No significant difference was found on the Lachman test (p = 0.849, p = 0.126, and p = 0.466), pivot test (p = 0.877, p = 0.678, p = 0.904), and rolimeter (p = 0.395, p = 0.566, p = 0.455), as well as sfCOMP (p = 0.375, p = 0.990, p = 0.409), MRI T2-map (p = 0.846, p = 0.106, p > 0.999), and MRI T2-map semiquantitative (p = 0.970, p = 0.643, p = 0.190) in both groups before surgery, after three months and after six months postoperative. The mean value of the joint stability examination for each group improved from before surgery, after three months, and after six months postoperative (p < 0.05). The SBACL and DBACL groups had no significant difference in sfCOMP (SBACL, p = 0.58; DBACL, p = 0.084), MRI T2-map (SBACL, p = 0.055; DBACL, p = 0.717) and MRI T2-map semiquantitative (SBACL, p = 0.05; DBACL, p = 0.06) at three months and six months. The sfCOMP biomarker showed a decrease in values after three months and did not show further improvement after six months in both groups. Rolimeter examination did not significantly correlate with the cartilage integrity marker sfCOMP and MRI T2-map. DBACL reconstruction provides results that are equivalent to SBACL in terms of Lachman tests, pivot tests, and rolimeters, as well as sfCOMP measurements and MRI T2-map assessments. No significant relationship between joint stability and sfCOMP levels and MRI T2-map, both after SBACL and DBACL reconstructive surgery."